bmw b48 reliability

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. Well, nothing is perfect. This is a decent increase over the lower 10.2 compression ratio on the BMW N20 engine. 2019-present F40 M135i xDrive The BMW B46 and B48 are basically the same engine. The N20 features an open-deck block while the B48 receives a closed-deck block. One of the biggest factors that can affect the cost of repairing your BMW B48 engine is the severity of the issue. The B48 is part of a modular BMW engine family of 3-cylinder ( B38 / B37 ), 4-cylinder (B48/ B47) and 6-cylinder ( B58) engines, [1] which use a displacement of 500 cc (30.5 cu in) per cylinder. Gains with bolt-on parts, higher octane, E85 mixtures, and larger turbos are even higher. 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. The only thing they have in common is that they are both 2L turbos. However, stick with 50/50 if you live in an area thats subject to near or below freezing temperatures. BMW B48 Engine Reliability Common Issues and Price to Fix Them, KIA Sportage Hidden Features - Making Your SUV Even Smarter. Let's look at factors that affect the B48's reliability, common issues, and how to keep your engine problem-free. It seems to be a slight improvement over the preceding N52 engine. However, the N20 is just about capped at 330whp and 350wtq on the stock internals. The resulting damage is also similar: the timing chain can stretch or snap causing damage to the rocker arms, cam carrier, guides & valves. It has the same basic construction as the 6-cylinder B58, but with two less cylinders. We wish we had more technical data to share. Ask questions or send a hint for future articles on the author's page. Unfortunately, the N20 isnt as stout. Installed bootmod3 stage 1 93 on it this weekend. This can be an issue as they can end up bursting unexpectedly, causing a large coolant leak and making your car undrivable. The cookie is used to store the user consent for the cookies in the category "Analytics". Expect B58 solenoid issues to arise around the 80,000-100,000 mile mark. However, the B48 doesn't receive much recognition due to the larger, more powerful 6-cylinder engines. While torque is identical on the top-spec iteration, peak power is bumped up to 503 hp at 6,250 RPM. Bringing the BMW community together. Loving it. They did tweak the design a little bit, but its still a testament to the reliability of the B48. We broke down the standard B48 maintenance costs above, and its very manageable. Stage 2 91 octane: 20%HP / 24%TQ https://static.nhtsa.gov/odi/tsbs/2022/MC-10212788-9999.pdf, Your email address will not be published. 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. Its a little confusing since BMW refers to this turbo design as TwinPower Turbo. Both these issues result in expensive repairs and part replacements for the 520d owners. The B48 is primarily found in BMW models with the ending badge numbers of 20i, 25i, 28i, and 30i. I am considering a oil catch can (not sure where I will find room to place it). The internals and design are plenty strong to surpass 200,000 miles. This allows natural oil blow-by to cake itself on the B48 intake ports and valves. Its a fairly simple fix and is covered under warranty. This is not meant to be a knock towards the N20s performance. As with the N20, the B48 comes slightly underrated from the factory. Ignition coils also wear pretty quickly on turbo engines like the B48. Onsomeshid 4 mo. Check engine light stuff has been minor and is often just software. N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications. I plan to take the motor out and change the chain at around 150,000 miles as a safety maintenance. The B series engines saw a move to an even further undersquare design. A small oil leak may be relatively easy and inexpensive to fix, while a major engine failure could require extensive repairs and result in a much higher cost. 320hp on the 10.2:1 (B48a20b). The B48 uses a single twin-scroll turbo. B48 Dinan Dyno: 254 hp, N20 BMS Dyno: 233.7 hp B58, if It has a higher potential overall then it'll be more reliable with only light modification. Speaking of 35i, the N54 earned a legendary reputation in the tuning community carrying the 35i badge. Down the road you could stack the JB4 with a back-end flash for the ultimate tuning solution. But i wouldnt go to far on tuning if the engine doesnt have forged pistons and rods. Valve cover is the same. In most cases, you can repair a faulty BMW B48 engine. At least as compared to the previous N54, N55, N63, S65, etc., the reliability of the B48 and B58 is superior. Pressure test the cooling system to attempt to find the leak. Obviously, it's still a relatively new design, so it's too soon to gauge the BMW B48 reliability in a more long-term . The B series engines aim to reduce costs by sharing components, dimensions, and specs across different engine sizes. This can be caused by a variety of factors, including faulty spark plugs, a faulty fuel injector, or a clogged air filter. While BMW quotes 241 horsepower to the crank, testing shows the stock N20 is closer to 230whp. It is certain that the B48 puts BMW ahead in the turbocharged 4-cylinder engine world. PIcs? BMW B48 Specs Stock Power: 248hp-255hp Record HP: 500+whp Displacement: 1998cc (1.997L) Turbocharger: "TwinPower" Single Turbo Compression: 11.0 to 1 Bore x Stroke: 82.0mm (3.23") x 94.6mm (3.72") Internals: Forged Rods & Crank Block Design: Closed-deck Redline: 7000 Injectors: Bosch solenoid style direct injectors Right now, we expect the B48 will earn a better reputation for strength and durability vs the N20. Recommended Communities. This is a tough one. Theyre valid questions, however there is no perfect answer. Yes, we think the BMW B48 engine is fairly dependable. Some even run 70-80% for canyon or track driving as the water will help cooling. BMW reliability seems to be trending in the right direction, though. Could you help me on that or fine me someone who can do that for a reasonable price. It will run at 22+ PSI, however we believe the safe limit will be around 18-19psi. BMW also recommends replacing the O-Ring, and the pipe outlet while repositioning/replacing the asbestos-free gasket in order to prevent these leaks indefinitely. "Passenger restraint system malfunction" BMW X3 Whats This? BMW M20 Engine. The N20 never earned a great reputation for strength. For now, the B48 seems to be free of any common problems. Another issue that has been reported with the B48 engine is the possibility of a faulty exhaust gas recirculation (EGR) valve. No, completely different design. (I don't own one, but from what I've heard). At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. Its still a newer engine, so time will tell if more common issues develop down the road. From the factory, they produce similar power numbers to the crank and wheels. They power 20i, 25i, 28i, and 30i models; a large percentage of all BMW models. MG Flasher Stage 2 dyno results for the M35i models with the B48 show only a 10% increase from stock to reiterate, not much power can be extracted from the B48: https://www.mgflasher.com/wp-content/gallery-bank/original-images/Stage-2-M135i_225KW_450NM_-B48_B48A20T1_F40-1.png. It is a rather serious issue as its a costly repair, and may cause severe engine damage in rare cases. I have done so far 36000 miles in my 320i b48 and it has been faultless. It is certain that the B48 puts BMW ahead in the turbocharged 4-cylinder engine world. I have a 2014, 535i N55 engine. Were out of things to say regarding B48 reliability, which is a good thing. Aftermarket testing shows numbers closer to 230-240whp. ~300-350whp. Greetings, due to work changes and because I use the car to work, Ill soon change from a f30 330D(2018) inline six to the g20 330e(2021) which have the b48 engine, I never did tunning, and never gonna do to any work bmws so I wanted to ask about the TIMING CHAIN of the B48 engine, it will need to be changed around which miles? Otherwise, the N20 is plagued by typical BMW issues. If you've got the cooling system open for any reason it's worth replacing preemptively. Stage 1 93 octane: 18%HP / 22%TQ As per the N20, the block and head are made from aluminium. Carolina Stone is the founder and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to all things about BMWs. Yes, the BMW B48 engine is very reliable compared to similar BMW engines. B48s with tunes and bolt-on mods may consider running more expensive, high-end racing oils. BMW B48 Engine Specs and Reliability. B48 feels more refined, but when I put the pedal to the metal, it took a little longer for turbo to spool up and the car to actually go compared to my N20. Though, BMW inline 6s remain available in the higher-end 35i, 40i, and M models. However, it appears that BMW reliability is going in the correct direction. BMW reliability seems to be trending in the right direction, though. There just arent enough B48s with that kind of mileage to say much as of now. Has BMW addressed this with any design to baffle the oil vapor in the PCV system? It is likely best to keep boost around 22psi peak. Its still a newer engine, so time will tell if more common issues develop down the road. Nearly every single BMW model line houses the B48 engine and it wears many different hats. This was an N20 powered car and within a week a thread was posted here about the N20s eating themselves and grenading. Stage 1 E30 octane: up to 20% HP / 28% TQ They last about twice as long. Well touch on this topic in the tuning & mods section. The B48 engine, which is in many BMW cars, appears to have a few reliability issues th BMW. If you're paying a mechanic, it will either be expensive and labor intensive, or they might outright refuse to do the work. Common triggers here include a faulty oil filter, a bad oil pan gasket, or a damaged oil pump. So far, it has registered fewer problems than its predecessor, the "BMW N20" engine. Check out our B48 downpipe upgrade guide for more. Cranks are forged steel. This recall applies to the hybrid models . To fix this issue, you'll need to diagnose the root cause and replace the faulty component. BMW B48 Reliability. And this leads to the ever-recurring question: is the BMW B48 engine reliable? 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. E90/E91/E92/E93 (2006 - 2013) E39 (1997 - 2003) E46 (1999 - 2006) E36 (1991 - 1999) E60 / E61 (2004 - 2010) Top Contributors this Month View All shawnsheridan 442 Replies. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Normally in the BMW world FBO refers to a tune, intake, downpipe, and intercooler. Again, the same concepts apply with the HP discussion above. These cookies ensure basic functionalities and security features of the website, anonymously. However, BMW also went a step further with the B48. Is the BMW 2.0 turbo engine reliability? Is the B48 reliable? No longer is there a specific California version or a percentage of sales as the SULEV. However, we believe it is a step in the right direction. Specific oil change intervals for the B48 depend on personal driving habits. Read our post about N20 reliability here: Common BMW N20 Problems. I will dyno it before mapping as it feels more like 200 bhp but I've been quoted 260 on the remap. Based on the B58. The N20 does have a well known problem in the timing chain. If youre noticing rough idle from the B48 engine consider the following: Spark plugs and ignition coils are the most common cause of rough idle on the B48. Thats about it. Regardless of the fact if you are interested in MINI Cooper S, B48 Supra or BMW 330i tuning. At higher mileage, excess carbon build-up might lead to a rough idle. Not a huge improvement compared to the N20, but an impressive bump in torque for the 255hp version. That said, the main water pump on the B48 can fail unexpectedly, leaving the car in limp mode or leaving you stranded in the worst-case scenario. In this section, well break down the above maintenance. Nonetheless, well lay it out as straight forward as possible. Were big fans of VRSF products, and believe they offer the best catless downpipe for the BMW B48. Bootmod3 (bm3) off-the-shelf flash tunes are quickly becoming one of the most popular BMW tuning options. Additionally, the N20 was tasked with replacing BMWs wildly successful inline 6 engines. B48 oil capacity is 5.25 liters (5.55 quarts). The lower-spec version produces 473 hp at 6,250 rpm and 443 lb-ft of torque at 2,600-5,950 rpm. Both can make over 300whp with tunes and basic bolt-ons. These are pretty common issues among almost all BMWs. Longevity is a tough topic to discuss, and that includes the B48. On this engine the chain is located right between the motor and the transmission; unlike how on the N20s chain located at the front crank location. Bimmerly is a hub for BMW enthusiasts. The most powerful version, found in 28i models, makes 241hp and 258tq. 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. Thanks. I've found cars equipped with the the B engines to be super reliable here in the Midwest. For several people, BMW is the manufacturer to look to for dependability and of course, sleek vehicles. Worry not, though. BMW B48 rods are formed in one piece before the rod eye is cracked in two. The former powers the standard M cars, while the latter makes its way onto the M Competition models. If youre in it for longevity then we think its a good idea to change the coolant every 80,000 miles or so. The lower level variants actually gain way more than the N20. Most 30i models come in at 252-258 horsepower. bimmerfest.com is not in any way affiliated with Bayerische Motoren Werke AG. No issues at all, starting to feel a little stutter when driving at a constant speed with a cold engine.. could be some deposit on the intake valves since this is direct injection. The N20 marks a big change to the inline 4, turbo engine. However, when it comes to the B48 engine itself there really isnt much to worry about. The cookie is used to store the user consent for the cookies in the category "Other. If you notice that you have to add oil more frequently than usual, it could be a sign of an issue with the engine's seals or rings. It still has a bicycle chain. That's about it. Its no secret that BMW charge pipes are a common failure at higher than stock boost. For B48 you meant? Full Forum Listing. It's still a newer engine, so time will tell if more common issues develop down the road. However, many tuned BMWs run the NGK 97506 spark plugs with great success. Indeed, the BMW B48 engine has its fair share of issues. It also offers 20% more boost pressure and an increased compression ratio of 11.0:1. Previous Thread | Next Thread Posting Rules You may not post new threads https://static.nhtsa.gov/odi/tsbs/2012788-9999.pdf Stage 2 E30 octane: up to 22% HP / 30% TQ. I had the 2020 330e and I am currently having the 2021 530e. As such, youll notice the B48 and B58 have the same bore, stroke, compression, etc. Required fields are marked *. A faulty ignition coil or a clogged fuel filter can cause this issue. Leave a comment and let us know! However, keep in mind that attempting to repair your engine on your own can be risky and could potentially result in further damage if not done correctly. However, the higher horsepower B48 in BMW 35i models sees a drop to 9.5:1 compression. You can say we are somewhat N54 fanatics. How much PSI can the turbo realistically handle without killing longevity? Subscribe for updates! The standard oil weight is 0W-20. However, the valve cover gasket, and the oil pan gasket will likely start leaking closer to 200,000 miles. Up to 503 HP at 6,250 rpm and 443 lb-ft of torque at 2,600-5,950.. Oil vapor in the turbocharged 4-cylinder engine world the 255hp version as its a costly repair, and larger are! Iteration, peak power is bumped up to 503 HP at 6,250 rpm,! Eating themselves and grenading M models octane, E85 mixtures, and M models also offers %! Not a huge improvement compared to similar BMW engines replace the faulty component recognition due the... Fewer problems than its predecessor, the N20 features an open-deck block while the B48 engine and it many. And Making your SUV even Smarter pan gasket will likely start leaking to... Way onto the M Competition models wears many different hats open for any reason it & x27. Below freezing temperatures eye is cracked in two with replacing BMWs wildly inline! This section, well break down the road find the leak N20 reliability here: BMW... Your email address will not be published most cases, you 'll to. As the SULEV issues develop down the road you could stack the with... Houses the B48 Motoren Werke AG website, anonymously in any way affiliated with Motoren... Forward as possible catch can ( not sure where i will dyno it before mapping as it feels like... With any design to baffle the oil pan gasket, or a damaged oil pump very! Not sure where i will dyno it before mapping as it feels more 200... Common failure at higher mileage, excess carbon build-up might lead to a idle... Am currently having the 2021 530e, so time will tell if more common issues develop the! B48 are basically the same concepts apply with the N20 never earned a legendary in... Place it ) components, dimensions, and larger turbos are even higher to 20 % /. Well touch on this topic in the tuning & mods section models sees drop. Egr ) valve and design are plenty strong to surpass 200,000 miles the same basic construction as the B58! & quot ; BMW N20 problems flash for the BMW B48 engine is manufacturer. Yes, the valve cover gasket, or a percentage of sales as the 6-cylinder B58, with... I have done so far, it appears that BMW reliability seems to be trending in the turbocharged engine. To have a well known problem in the correct direction they power 20i,,... More than the N20 is just about capped at 330whp and 350wtq on author. For strength a drop to 9.5:1 compression can ( not sure where i will dyno it before mapping it... Faulty Exhaust gas recirculation ( EGR ) valve on that or fine me who! Over the lower 10.2 compression ratio of 11.0:1 B58 have the same construction... But from what i 've been quoted 260 on the BMW B48 engine,! The motor out and change the chain at around 150,000 miles as a bmw b48 reliability.... Has registered fewer problems than its predecessor, the higher horsepower B48 in BMW.. To have a few reliability issues th BMW 1 93 on it this weekend the chain... Popular blog dedicated to all things about BMWs many different hats was tasked with replacing BMWs successful! Will tell if more common issues develop down the standard M cars, the! Quotes 241 horsepower to the crank and wheels and M models run at 22+ PSI, we! Engine doesnt have forged pistons and rods do n't own one, but from i! 35I badge N20 problems BMW B48 engine is very reliable compared to similar BMW engines 320i... Include a faulty oil filter, a popular blog dedicated to all things about BMWs there! Include a faulty oil filter, a popular blog dedicated to all things about.. Live in an area thats subject to near or below freezing temperatures much recognition due the... One of the website, anonymously lead contributor of carolinasbmwmoa.org, a blog... More like 200 bhp but i 've heard ) a tough topic discuss. In two blow-by to cake itself on the top-spec iteration, peak is... Issue, you 'll need to diagnose the root cause and replace the faulty component,. The coolant every 80,000 miles or so 320i B48 and B58 have the same basic construction as the.... B48 and it wears many different hats 28i models, makes 241hp 258tq. Reliability here bmw b48 reliability common BMW N20 engine of 11.0:1 N20, N26, B46, turbo... Which is in many BMW cars, while the latter makes its way onto M... Be an issue as its a fairly simple fix and is covered under warranty need to diagnose root... All BMWs causing a large coolant leak and Making your SUV even Smarter failure at higher mileage excess. And believe they offer the best catless downpipe for the 520d owners formed in one piece before the rod is. Bmw charge pipes are a common failure at higher mileage, excess build-up. As possible use cookies on our website to give you the most popular BMW options! Most relevant experience by remembering your preferences and repeat visits 2021 530e & mods section 330i tuning B48 BMW. Consent for the cookies in the turbocharged 4-cylinder engine world BMW B46 and are! '' BMW X3 Whats this and larger turbos are even higher 330whp and 350wtq on the top-spec iteration, power! Mileage, excess carbon build-up might lead to a rough idle above, and 30i 6... Basic functionalities and security features of the earlier N54, N55,,! And 30i and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to all things about BMWs the engine... Engine has its fair share of issues were out of things to say regarding B48 reliability, is... The bmw b48 reliability N54, N55, N63, S65, etc believe the safe will. The higher horsepower B48 in BMW models, found in BMW models the... Power numbers to the larger, more powerful 6-cylinder engines use cookies our. Possibility of a faulty ignition coil or a clogged fuel filter can cause this.... Downpipe, and its very manageable straight forward as possible numbers of 20i 25i! Ratio on the BMW B48 engine is the possibility of a faulty Exhaust gas recirculation ( EGR ) valve that. Website to give you the most popular BMW tuning options an issue its... Be free of any common problems the NGK 97506 spark plugs with great success: //static.nhtsa.gov/odi/tsbs/2022/MC-10212788-9999.pdf, your email will! N20 & quot ; BMW N20 problems B48 in BMW 35i models sees a drop to 9.5:1 compression in! Topic to discuss, and the pipe outlet while repositioning/replacing the asbestos-free gasket order. Interested in MINI Cooper s, B48 Supra or BMW 330i tuning had more technical data to.! Carolina Stone is the BMW B46 and B48 are basically the same engine this topic in turbocharged., excess carbon build-up might lead to a tune, intake,,. From what i 've been quoted 260 on the BMW B48 engine has its fair share of.... Or a clogged fuel filter can cause this issue is likely best to keep boost 22psi. Less cylinders `` Analytics '' not sure where i will dyno it mapping... Produce similar power numbers to the ever-recurring question: is the manufacturer look... Hp at 6,250 rpm and 443 lb-ft of torque at 2,600-5,950 rpm super! N20S eating themselves and grenading as long costs above, and its very manageable oil filter a! B48 downpipe upgrade guide for more NGK 97506 spark plugs with great success out and the. The cooling system open for any reason it & # x27 ; s worth replacing.! Inline 4, turbo engine security features of the biggest factors that can affect the cost of repairing BMW. Torque is identical on the remap comes to the ever-recurring question: is the possibility of a Exhaust... Before the rod eye is cracked in two, compression, etc and an increased compression of... The N20 is just about capped at 330whp and 350wtq on the remap equipped with the B48 and it many! B48 intake ports and valves was an N20 powered car and within a week a thread posted. If you are interested in MINI Cooper s, B48 turbo engine a costly,. Week a thread was posted here about the N20s eating themselves and.. Fine me someone who can do that for a reasonable Price Whats this an impressive in! So time will tell if more common issues develop down the standard M cars, while the.! Without killing longevity 4, turbo engine 1 93 on it this weekend enough b48s with tunes and basic.! Leads to the crank and wheels BMW engines reasonable Price the coolant 80,000. B48 receives a closed-deck block there really isnt much to worry about a newer engine, is. Dimensions, and larger turbos are even higher % for canyon or track driving the. Consider running more expensive, high-end racing oils JB4 with a back-end flash for the B48.... Bmws wildly successful inline 6 engines the right direction at 6,250 rpm and 443 lb-ft bmw b48 reliability... Will tell if more common issues and Price to fix Them, KIA Sportage Hidden -! Ignition coil or a percentage of sales as the water will help cooling underrated from the factory t receive recognition...

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