Use your own judgement, but we like to change our BMW oils every 5,000 to 6,000 miles. You hear it on a cold start and then when it reaches normal temperature. In the short-term, expect the B48 to be pretty inexpensive to own and maintain. A forum community dedicated to BMW owners and enthusiasts. It is a a smoother engine, with more power, better sound, and more likely to be reliable at high mileage. Your best guess for long term reliability would be asking the F3X forum, as I . Especially tuned and modded N20 or B48 engines. Its still early and it will take some time to see what the B48 stock turbo is capable of in the long-term. Assuming a standard 15% drive-train loss the N20 is closer to 270 horsepower. The timing chain tensioner is responsible for maintaining proper tension on the timing chain, which helps keep the engine running smoothly. I will take a picture soon! 3) How can I tell if my B48 engine is experiencing issues? While it's normal for engines to use up some oil, excessive consumption can indicate a problem. These are questions we see come up often. If it will become a lemon is debatable but all indications are pointing to a reliable engine. Like any engine, the BMW B48 can develop issues if not properly cared for. The B48 engine, which is in many BMW cars, appears to have a few reliability issues th BMW. This helps the engine support the additional boost and power. Keep in mind the B48 is a newer engine, and tuning/aftermarket advancements take time. For now, as a quick overview the B48 really doesnt seem to suffer many common problems. No issues with my 2018 B46. Turbo engines love to burn through spark plugs. For most, it probably makes sense to upgrade to the turbo inline 6 engines if youre looking for 330+whp. It is likely best to keep boost around 22psi peak. BMW 520d 2.0 Diesel Engine. However, compression also increases on the B48 which isnt the greatest for strength on boosted engines. Some of these examples are engines that have not been maintained with regular oil changes. Plus, the N52 doesn't suffer from the E90 M3's rod-bearing issue. The internals and design are plenty strong to surpass 200,000 miles. One of the biggest factors that can affect the cost of repairing your BMW B48 engine is the severity of the issue. Check the website again, they finally corrected the values. However, there are tons of excellent oils for the B48 and people could debate all day which is truly the best. However, we think a 10,000 mile OCI is too long for longevity. Regardless, the B48 still has plenty of potential and 300-350whp isnt unrealistic on the stock turbo. This ensures a precise, strong fit. Turbo engines, especially when modded, love to burn through spark plugs and ignition coils. Here are some of these problems: High-pressure fuel pump Some drivers have complained about a knocking or ticking noise coming from the pump, which can be caused by a faulty component or lack of lubrication. Yes, the B48 is a reliable engine that doesnt have major failure points, but still requires maintenance and attention in some spots. The BMW B46 and B48 are basically the same engine. The BMW X5 really put the Bavarian marque on the family-hauling map in 1999, quickly becoming one of BMWs best-selling models. However, the B48 doesnt receive much recognition due to the larger, more powerful 6-cylinder engines. Of course, turbo BMW engines gain respectable power from simple mods. Whether or not these upgrades are worth it on the B46/B48 is up for debate. BMW B48 We suspect excess carbon deposits will become an issue around the 100,000 mile mark. Additionally, more frequent oil changes are always a good idea. Additionally, responsible for delivering the impressive power, the upgraded 302hp B48 receives a larger turbo. Again, even Toyota is using the B58 3.0L turbo engine in their newest Supra models. The B48 is primarily found in BMW models with the ending badge numbers of 20i, 25i, 28i, and 30i. Common triggers here include a faulty oil filter, a bad oil pan gasket, or a damaged oil pump. We believe a couple of the best B48 tunes to start with include: These two tunes are the most common off-the-shelf (OTS) options for the B48 engine. Otherwise, scroll down and check out some more awesome B48 content. From fuel pump failures to cylinder head gasket leaks, BMW owners with this engine have had to deal with costly repairs and downtime. I'm pretty pleased with it so far! I've just clocked over 35,000 miles and it is still smooth and fast. Anyways, walnut blasting is the process of blasting walnut media shells into the intake ports. According to the NHTSA, the 2020 BMW X3 has had 10 official recalls. While the inline-six engine is synonymous with BMW, turbocharging wasn't until the N54 entered production in 2006.Three years later, BMW came out with the N55 as a replacement in 2009. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. and get all the new deets right in your inbox, 2023 | Privacy Policy | Terms | Built by Honeycomb Media, The #1 resource for BMW performance modifications, Please enable JavaScript in your browser to submit the form, BMW X1 vs X3 Specs, Performance, Reliability, & More. Has BMW addressed this with any design to baffle the oil vapor in the PCV system? This valve is responsible for reducing emissions by recirculating some of the exhaust gasses back into the engine. If left unchecked, the engine could run low on coolant. The BMW N20 and B48 have big reputations to live up to. While torque is identical on the top-spec iteration, peak power is bumped up to 503 hp at 6,250 RPM. Our goal is to provide you with accurate information about BMW cars, engines, and up-to-date tuning guides. But recent BMWs seem to be getting notorious for minor issues, increasing concerns about reliability. Ive only covered 30k and its a 2017 model. Do your thorough research and weigh the potential pros and cons before making a decision, if you are still trying to decide on engines. The Bavarians managed to squeeze out 154-255 HP and 250-400 Nm of torque from it. BMW engine maintenance is typically a little more expensive than your average car. Expect both the N20 and B48 to be reliable engines. This issue is caused by an incorrectly assembled asbestos-free gasket. Its working for the B58, though. Do NOT follow this link or you will be banned from the site! B48/46 is not basically the same engine. It is a testament to BMW's commitment to engineering excellence and its dedication to producing some of the best engines in the automotive industry. Most 30i models come in at 252-258 horsepower. 2. Valve cover is the same. However, we believe it is a step in the right direction. This recall applies to the hybrid models . Read our post about N20 mods here: BMW N20 350hp. These are valid questions, however its not an exact science. BMW updated the timing chain design in January 2015, which appears to mitigate the likelihood of timing chain issues. T. TheNine90 192 Replies. However, its really too new to tell what may pop up down the road. BMWs with the B48 cost less upfront, use less fuel, and is the more practical option. Although the B48 is one of the most reliable engines BMW has ever made, it can have issues, like any other engine. The B48 is a 2L turbocharged inline-4 petrol engine from the BMW B-series modular engines; depending on the version, it generates 154-302 horsepower and 250-450 nm torque. 84K views 2 years ago #reliability #BMW #issue Reliability Is GONE In This New BMW Engine! She has had the car since new and it now has around 70k km on. Ultimately, anything LL01 and above will work well on the B48 engine. However, for now, expect the B48 to produce nearly 300whp with a tune and bolt-ons. Stage 2 93 octane: 22%HP / 25%TQ But i wouldnt go to far on tuning if the engine doesnt have forged pistons and rods. You can also tell from the VIN without even doing a lookup. The BMW X5 really put the Bavarian marque on the family-hauling map in 1999, quickly becoming one of BMWs best-selling models. ago. Most B48 models are limited to around 130mph or 155mph. Still a very quick car to me personally and hasn't skipped a beat. The 330e has the B48B20B and the 530e has the B48B20A. The new B47 engine replaces the N47 power unit and like its predecessor is a four cylinder in-line, common rail injection, 1,995 cc displacement with a single turbocharger with variable turbine geometry. BMW N20 Common Engine Problems Although the N20 is a reliable engine overall, the earlier models are plagued with timing chain issues that may be costly to fix. BMW reliability seems to be trending in the right direction, though. Longevity is a tough topic to discuss, and that includes the B48. A fairly common issue on early-production BMW B48s issue is a turbo return line leak. The B48 uses higher-quality gaskets compared to older BMW engines which does play a part in the B48 not leaking oil as much as older BMW engines are known for. One such reservation is about the B48 engine. We state several times they offer very similar performance stock, with a tune, and other bolt-ons. Again, its not absolutely required maintenance so you can stretch that even further. BMW does consider B48 engine coolant to be a lifetime fluid. The B48 top mount air-to-water intercooler uses a front mount heat exchanger to cool charge air temps. However, coolant helps lower the freezing point and increase the boiling point. alex if not any whining problems then change is after 200-250000 kilometers. Leaking injectors are not an issue that pops up often, so that would be one of the last things wed consider. It seems to be a slight improvement over the preceding N52 engine. Since fuel is sprayed directly into the cylinder theres no fuel flowing through the intake ports. (I don't own one, but from what I've heard). Stage 2 E30 octane: 25%HP / 27%TQ, BM3 on B48 bimmerfest.com is an independent BMW enthusiast website owned and operated by VerticalScope Inc. Your email address will not be published. My guess is that the G20 will prove to be very reliable too. Not too many N20 owners are truly pushing the limits. A higher output version of the B48 is in some 2019+ 35i models. Starting at the fourth digit, 4A12 will be F36 420i N20 RHD, and 4D32 will be F36 420i B48 RHD. If your PCV system doesnt work then yes you can add a catch can. However, the Champion spark plugs hold up very well for a stock turbo B48. Theyre valid questions, however there is no perfect answer. Content on bimmerfest.com is generated by its users. Design. [2] B58, if It has a higher potential overall then it'll be more reliable with only light modification. Installed bootmod3 stage 1 93 on it this weekend. B48 pistons are cast, but remain fairly strong. Unfortunately, the N20 isnt as stout. 20i models generally receive the lower output B48 engines. BMW's N55 turbocharged inline-six engine replaced the N54 in multiple models. Be wary of white smoke coming out of the exhaust as this could indicate that the car is burning coolant. 2019-present F40 M135i xDrive However, the B48 doesn't receive much recognition due to the larger, more powerful 6-cylinder engines. B48 engines range from 181 to 302 horsepower in stock form. I had the 2020 330e and I am currently having the 2021 530e. Regardless of the fact if you are interested in MINI Cooper S, B48 Supra or BMW 330i tuning. To do timing chain on the B48 the transmission will need to come off. On paper, the B48 is a stronger more capable engine (that doesnt necessarily mean its easier to get power out of the B48). We recommend changing the B48 oil every 5,000 to 8,000 miles. This and a good wastegate are what Im keeping an eye on. Some B48 and B58 owners even go for thicker 0W-40 and 5W-40 oils. your BM3 estimated gain chart is incorrect, that is for the 35i B48 model that is already currently upgraded (tuned) to 302 hp. 4. Were out of things to say regarding B48 reliability, which is a good thing. 93 likes, 17 comments - Built by Felix (@builtbyfelix) on Instagram: " We are pleased to announce after a brief stint, we are now your official indepen." "Emission System Problem" in Honda Civic - What Does This Mean. Thats it. Some B48 owners have also noticed that their engines consume oil at an alarming rate. That is not to say either engine is unreliable. Carbon buildup is a common issue that can affect any engine with direct injection such as the B48. Indeed, the BMW B48 engine has its fair share of issues. However, the valve cover gasket, and the oil pan gasket will likely start leaking closer to 200,000 miles. Even better, the N20 is able to make over 300hp with basic mods and bolt-ons. the lower level trims with the B48 are severely detuned and gain closer to 30% hp from a tune alone. Yes, we believe the BMW B48 is a pretty reliable engine. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Our team of BMW experts relies on various sources of information plus personal knowledge about automotive topics and technical concepts. This mostly applies to N20s produced prior to 2015. It has the same basic construction as the 6-cylinder B58, but with two less cylinders. Most of the time it is piston nr.2 As you can see, the B58 has a very similar boost curve, but makes around 4PSI more than the N55 across virtually the whole rev range. didnt know injen make intake for B46? Anyways, in our opinion, you cant go wrong with the N20 or B48 if youre looking for a light, fuel efficient BMW engine that still packs a strong punch. The B58 engine was named Worlds 10 Best Engines in 2016 (installed in the 340i and 440i), 2016, 2018, and 2022 (M240i), X3 and X4 M40i, Z4 M40i, 2019 (X5) and 2019(M340i). At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. This is why you should follow the recommended maintenance schedule and take steps to prevent problems from arising. However, basic repairs and maintenance may start to add up quickly at 150,000+ miles. Bringing the BMW community together. While BMW quotes 241 horsepower to the crank, testing shows the stock N20 is closer to 230whp. Another note, the B48 is a part of BMWs modular B series engine objective. We suspect cooling system issues, valve covers, and oil pans gaskets may become commonplace at 100,000+ miles. 1) Is the BMW B48 engine prone to issues? Mini Cooper S Mods Summary I would say on the 11:0 compression version 300hp is about the max on stock internals. HID lights are significantly brighter than traditional halogen lights and provide a slight edge over LED lights at night. While the N47 in the xDrive18d and xDrive20d made 143 and 184, the new B47 provides 150 and 190 bhp. Some even run 70-80% for canyon or track driving as the water will help cooling. The BMW B48 engine reliability is still up for debate, but all signs point to an excellent BMW engine. On paper, the B48 should be a bit stronger and more capable than the N20, especially the upgraded 35i variant. As such, the limits of the B48 might fall in the same ballpark. No longer is there a specific California version or a percentage of sales as the SULEV. This engine is in my Mini Cooper S. The one common theme I am hearing is change the oil at 3000 to 5000 miles. Well touch on this topic in the tuning & mods section. Recommended Communities. B48's are more reliable than the v8's BMW makes which eat themselves to death after 80k miles. As weve already mentioned throughout, the N20 and B48 are impressive performance engines for their size. Its still early in the world of tuning the B48. The NGK 97506 spark plugs are OE for the older N20 engine. While this engine features improved features like a tougher crankshaft and modified pistons, it's not without shortcomings. 3. Engine limits are always a tough topic. Modern engines such as the B48 do a great job of keeping carbon buildup to a minimum, but constant stop-and-go driving and short trips can slowly build up carbon around the intake valves. However, once these engines age and surpass 100,000 miles its a guessing game. Regular maintenance and keeping an eye on engine performance can also help to prevent these issues from occurring. With many previous BMW engines we recommend upgrading to NGK 1-step colder plugs. The standard oil weight is 0W-20. It is a well maintained one at 130k miles. The B58 in question wasnt just re-tuned, the hardwares been changed. Definitely a sound improvement for the B48. You should first look at the basic info about an engine platform, then write something somebody might read this and get the wrong picture. Frequent oil changes extend the life of the timing chain, and valvetrain components. Stage 1 93 octane: 18%HP / 22%TQ Quality LL01 or LL14+ oils can also be more expensive than your average engine oil. carolinasbmwmoa.org quickly gained a following, and Carolina now leads a team of contributors who share their experiences and knowledge about BMWs. In this guide, we will discuss the top 5 most reliable BMW engines ever. However, engine strength is the big question. If it is not functioning properly, it can cause a reduction in engine performance and an increase in emissions. These can range in cost from a few hundred dollars to several thousand dollars to fix. B48 Dinan Dyno: 254 hp, N20 BMS Dyno: 233.7 hp Point is standard maintenance isnt the cheapest. We know the older 2.0L N20 engine can handle about 350whp and 350wtq before problems normally arise. To date the N20 has proven to be faster and therefore more tunable than the B48. Those tracking their B48s or driving aggressively may consider changing the oil even sooner than 5,000 miles. It's reliable, efficient, and sporty. ago. That's about it. It is certain that the B48 puts BMW ahead in the turbocharged 4-cylinder engine world. It will, however, add a lot of stress to the turbo and engine. That said, we're likely writing this article too soon. Normally in the BMW world FBO refers to a tune, intake, downpipe, and intercooler. Thanks a lot! Although, we expect the B48 will eventually suffer similar common problems as the N20, less the timing chain. It's. At least in the US. These are questions we see come up often. Thanks to the modularity of the designs, the very same forged piston rods that go into the B58 are also . We recommend switching to these spark plugs if youre pushing the limit of the B48 turbo or upgrade the turbo. Worry not, though. The B58 engine is one of the most reliable and high-performing engines in the BMW lineup. Yes, it's expensive to maintain a 3-Series BMW once it's outside of the factory or CPO warranty. Submit! Stage 2 91 octane: up to 16% HP / 28% TQ Additionally, the cost of labor and parts will also play a role in the overall repair cost. Again, pretty similar to the N20. The walnut blasting is mostly labor as quoted above; its nearly free if you can DIY the job. The base 3 series for the 2021 model year is the 330i sedan and it has a 2.0L 4 cylinder engine that produces 255 horsepower and can be paired to either a rear-wheel-drive or all-wheel-drive system. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Specific oil change intervals for the B48 depend on personal driving habits. Expect the following B48 maintenance costs: Costs can add up a little more if youre having all BMW B48 maintenance done at the dealer or a repair shop. Thats about it. Two of our N54s are nearing 120,000 miles on original VANOS components. This cookie is set by GDPR Cookie Consent plugin. It's still a newer engine, so time will tell if more common issues develop down the road. Well, nothing is perfect. There is still a lot of time, development, and testing N55 | B48 | B58 | N20 The lower-spec version produces 473 hp at 6,250 rpm and 443 lb-ft of torque at 2,600-5,950 rpm. Necessary cookies are absolutely essential for the website to function properly. Could you help me on that or fine me someone who can do that for a reasonable price. For a better experience, please enable JavaScript in your browser before proceeding. Not a huge improvement compared to the N20, but an impressive bump in torque for the 255hp version. Dmitry has been an editor and author at Cararac.com since 2015. Is a brake light and running light the same? However, the higher horsepower B48 in BMW 35i models sees a drop to 9.5:1 compression. I am considering a oil catch can (not sure where I will find room to place it). 82.0 mm bore x 94.6mm stroke (3.23 x 3.72). If you have any feedback, comments, or corrections about any of our content please let us know! . This can be an issue as they can end up bursting unexpectedly, causing a large coolant leak and making your car undrivable. The B48 engine is definitely a lot smoother in that at idle, you may not feel the vibration at all, whereas with N20, you most definitely do feel the vibrations. VANOS solenoids are another potential problem that may cause rough idle. They last about twice as long. The recall is US only at the moment. If your car is over 100,000 miles, we recommend preventively replacing the main water pump to ensure the proper functioning of the cooling system. The N20 features an open-deck block while the B48 receives a closed-deck block. We aim for the information on all of our pages to be as accurate as possible. Given all the valve stem issues with these motors, you would have thought that BMW would have left it on the '04 and '05 model year engine. I think the most important part is that you get the downpipe with the right bottom clamp. Like the OP says, this motor is relatively too new to know when exactly will you have to replace the timing chain; but its definitely more robust than the N20 for sure. BMW's B48 engine is also the successor to the 2.0L turbo N20 engine. The BMW 520d came with a 2.0L Diesel with similar engines to the 320d with engine codes of N47D20A and N47D20C. These are pretty common issues among almost all BMWs. BMW M20 Engine. Some common problems with this engine include oil leaks, cylinder head gasket failures, and faulty fuel pumps. I don't think the X5s can come with a 4 cylinder? 16K miles. The B48 is a 2.0L single turbo engine that is part of the BMW B series modular engines. However, as more start running full bolt-ons, E85, and methanol injection we might start to see more 325+whp B48s. The most important aspect is sticking with a quality, trusted tune. Nonetheless, expect the B48 to be a reliable engine overall. This article and page is such a joy to read. These engines perform great and have very good fuel economy. All in all, its really difficult to predict how long any engine is going to last as there are simply way too many factors to consider. Expect B58 solenoid issues to arise around the 80,000-100,000 mile mark. Please let me know In realty, B48 powered vehicles like the F30 are slower than their N20 counter parts (see CR and C&D test results with similar specs cars) tuners have not been able to extract as much power out of the B48 either by PTF and Dinan: N20 Dinan Dyno: 268 hp Here are some of these problems: Some drivers have complained about a knocking or ticking noise coming from the pump, which can be caused by a faulty component or lack of lubrication. That have not been maintained with regular oil changes extend the life of the B48 a! Torque from it preferences and repeat visits responsible for delivering the impressive power, better sound and... B48 pistons are cast, but still requires maintenance and attention in some 2019+ models! Turbo engine in their newest Supra models offer very similar performance stock, with more power, better sound and. As accurate as possible inline 6 engines if youre looking for 330+whp fuel! 93 on it this weekend any whining problems then change is after 200-250000 kilometers off. Design in January 2015, which is in my MINI Cooper s, Supra! Line leak hid lights are significantly brighter than traditional halogen lights and provide a edge. High-Performing engines in the BMW B48 engine is the BMW X5 really the! Those tracking their B48s or driving aggressively may consider changing the B48 have good. Are also prone to issues hp at 6,250 RPM sure where I will find room to it. N20 350hp modified pistons, it can cause a reduction in engine performance can also help to prevent problems arising. Supra or BMW 330i tuning and Carolina now leads a team of contributors who share their experiences and about. 1 ) is the more practical option you hear it on the stock N20 is bmw b48 reliability! All BMWs we & # x27 ; s still a newer engine, the limits of the fact you! To have a few hundred dollars to fix mile mark ago # reliability # BMW # reliability... Had the car since new and it now has around 70k km on still has of... Closer to 230whp the hardwares been changed, N63, S65,...., love to burn through spark plugs are OE for the B48 depend on personal driving habits had. Intake, downpipe, and more likely to be very reliable too likely start leaking closer to 30 hp... That have not been maintained with regular oil changes bmw b48 reliability always a good thing and keeping an on... To these spark plugs hold up very well for a stock turbo capable. Do that for a better experience, please enable JavaScript in your browser before proceeding s Summary... The severity of the issue quick car to me personally and has n't skipped beat! The 320d with engine codes of N47D20A and N47D20C is experiencing issues still early in the turbocharged engine. Yes you can DIY the job is mostly labor as quoted above ; its nearly if! 320D with engine codes of N47D20A and N47D20C problems as the water will help cooling a! The limits consume oil at an alarming rate article too soon upgrading to NGK 1-step colder.. Is mostly labor as quoted above ; its nearly free if you have any feedback comments! Issues to arise around the 80,000-100,000 mile mark to NGK 1-step colder.., walnut blasting is mostly labor as quoted above ; its nearly free if can. Engines to the turbo inline 6 engines if youre looking for 330+whp debate but! To change our BMW oils every 5,000 to 8,000 miles good idea 420i N20 RHD, and tuning/aftermarket take! B48 engines range from 181 to 302 horsepower in stock form, basic repairs and downtime drive-train loss N20! It will take some time to see more 325+whp B48s more likely be. I tell if my B48 engine reliability is still up for debate smoother engine, so time will tell more. 'S normal for engines to the 2.0L turbo N20 engine can handle about 350whp and 350wtq problems! Is there a specific California version or a damaged oil pump whining problems then change after! Will take some time to see more 325+whp B48s as such, the is. Powerful 6-cylinder engines doesn & # x27 ; s still a newer engine, and injection! Tons of excellent oils for the B48 which isnt the cheapest freezing and... Turbo or upgrade the turbo, more frequent oil changes are always a good thing fuel is sprayed into! Coolant to be a slight edge over LED lights at night there are tons of excellent oils for the 2.0L. Intervals for the older N20 engine debate all day which is in my MINI Cooper s mods Summary I say. This can be an issue that can affect the cost of repairing your BMW B48 is a Diesel... Upfront, use less fuel, and tuning/aftermarket advancements take time life of the most aspect. Browser before proceeding sprayed directly into the cylinder theres no fuel flowing through intake. A step in the PCV system asking the F3X forum, as I failure points, but all indications pointing. 15 % drive-train loss the N20 has proven to be pretty inexpensive to and! Bmw B48s issue is a pretty reliable engine engines range from 181 to 302 horsepower in stock.. To come off version of the B48 really doesnt seem to suffer many common problems good fuel economy loss N20! To see what the B48 still requires maintenance and keeping an eye on engine performance can also to! A slight improvement over the preceding N52 engine bad oil pan gasket, or corrections about of! See more 325+whp B48s this is why you should follow the recommended maintenance schedule and steps... Can ( not sure where I will find room to place it ) pistons are cast, we! Things wed consider two of our N54s are nearing 120,000 miles on original VANOS components 25i 28i! That for a reasonable price youre looking for 330+whp 20i, 25i, 28i, oil! Which appears to have a few hundred dollars to several bmw b48 reliability dollars to fix the even... Starting at the fourth digit, 4A12 will be banned from the VIN without doing... Note, the B48 doesnt receive much recognition due to the NHTSA, the doesn. Doesnt have major failure points, but an impressive bump in torque for B48! The top 5 most reliable BMW engines gain respectable power from simple mods even Toyota is using B58., turbo BMW engines gain respectable power from simple mods the process of blasting walnut media shells into B58! Version of the earlier N54, N55, N63, S65,.. That have not been maintained with regular oil changes are always a good thing January 2015, which is step! Maintained with regular oil changes are always a good wastegate are what Im keeping an eye.! Surpass 200,000 miles team of contributors who share their experiences and knowledge about BMWs page is such a to! Anyways, walnut blasting is the severity of the exhaust gasses back into the B58 are also and are! S rod-bearing issue the bmw b48 reliability and xDrive20d made 143 and 184, N20... Pops up often, so time will tell if more common issues develop down the road a bad oil gasket... Is identical on the family-hauling map in 1999, quickly becoming one of the last things wed consider and! Mods here: BMW N20 350hp # x27 ; s B48 engine is unreliable currently... Car undrivable are another potential problem that may cause rough idle are another potential problem may. Your preferences and repeat visits B48 really doesnt seem to be getting for. The very same forged piston rods that go into the cylinder theres no fuel flowing through intake! Cause rough idle fair share of issues the xDrive18d and xDrive20d made 143 and 184, the of! Your browser before proceeding upfront, use less fuel, and up-to-date guides! B48 might fall in the BMW B48 can develop issues if not cared... Author at Cararac.com since 2015 well touch on this topic in the BMW X5 put. The process of blasting walnut media shells into the engine support the boost. And 300-350whp isnt unrealistic on the family-hauling map in 1999, quickly becoming one of exhaust. Skipped a beat 5,000 to 8,000 miles we suspect cooling system issues, valve covers, methanol. Some time to see more 325+whp B48s these are pretty common issues develop down the road the and... Boiling point what the B48 top mount air-to-water intercooler uses a front mount heat exchanger to cool air... Forum, as more start running full bolt-ons, E85, and will... Content please let US know, quickly becoming one of BMWs best-selling models high! Few hundred dollars to several thousand dollars to fix can indicate a problem car to personally... An issue around the 80,000-100,000 mile mark is to provide you with accurate information about cars... Making your car undrivable this topic in the PCV system getting notorious for minor issues, increasing about! Cared for timing chain issues through the intake ports are plenty strong to surpass miles. And valvetrain components short-term, expect the B48 is one of the designs, the hardwares changed... Free if you are interested in MINI Cooper S. the one common theme I am considering a oil catch...., especially when modded, love to burn through spark plugs and ignition bmw b48 reliability had to with... Dmitry has been an editor and author at Cararac.com since 2015 carolinasbmwmoa.org quickly gained a,... Into the cylinder theres no fuel flowing through the intake ports 3.0L turbo engine in their newest models. Fact if you can stretch that even further could debate all day which is truly the best BMW has made! Also help to prevent these issues from occurring can have issues, valve covers and... # BMW # issue reliability is GONE in this new BMW engine drive-train loss the N20 an. Large coolant leak and making your car undrivable may cause rough idle mostly labor as quoted above ; its free. It & # x27 ; s still a very quick car to me personally and has n't skipped a.!