N55 vs b58 reliability reddit

Though it is a brand new engine and many were disappointed that the new Supra featured this engine as it was BMW, the engine has proved haters wrong due to its incredible reliability so far and the ability to make big numbers on stock components. Side note. N52 is the reliability king👑. With the redesigned injectors on the n55 vs n54 things got alittle better with newer injectors (still suck) and one turbo. If you’re trying to do something crazy with 500+ hp go for n54. A sub 200 horsepower Japanese economy car is nowhere near the same league of a 300 + hp german vehicle. The N20 was a fine motor in stock form but like the N55 it shares a lot of traits which limits its tuning capability. The chassis the Supra is on is completely different than the F30. B58 is a single twin-scroll turbocharger, while S55 uses two mono-scroll turbochargers. B48 vs. Both quality engines but they should have put the B58 in the original M2 IMO. The N55 may produce slightly less torque at lower RPMs. This sub-reddit is dedicated to everything related to BMW vehicles, tuning, racing, and more. I'm the 4th owner of mine and my mechanic said it all looked perfect still at 42k. The N46 is regarded as reliable … but it is woefully underpowered which also directly impacted its fuel economy. For the record both of my cars are full bolt on stage 2 MHD cars. The N55 is much closer to the N52 in reliability than the N54. New B58 has timing in the front, but for the rest of us F30 early adopters, that holds true. In my experience BMW engines are the last part of the car to be worried about reliability wise. As for maintenance, it will be similar but there is a core difference in the motors (N55 vs B58). They’re both awesome engines but the S58 is like a tesseract, it’s on a different level of performance. With its sturdy construction that can withstand aggressive tuning and abuse as well as its impressive power output capabilities. Relatively speaking, yes. B58 reliability. The B58 still sounds really great and has a larger turbo from factory, and a better intercooler system among other big improvements. If you have to worry about reliability, BMW is not the manufacturer you want to be with. Seems like you want to tune, and the B58 has more tuning potential. S58 Reliability: Are These Engines Reliable? BMW has significantly improved reliability in its turbocharged inline-6 engines iteration after iteration. I know the N63 has higher HP, being a “m lite” and lower fuel economy as a result. I’d say get a charge pipe and intercooler for n55, and as long as you maintain it well it will be fine. Probably equally reliable when it comes down to it. If you're from Europe try to get one without OPF for even more reliabilty and sound. Issues are rare, and issues from the N55 were fixed in the B58. Maybe find one that's had timing chains or engine replaced. 1. 6 Cylinder - BMW M88 I6. This engine is found in a variety of BMW models, including the M140i, M240i, 330i, M340i, 540i, X3 M40i, and Z4 30i, among others. Trades46. The B58's closed-deck design and upgraded turbo not only offer significant power increase but also promise future tuning capabilities with fewer emissions. There is also much more aftermarket opportunities for the N55 vs the new b58. If you live in hot climates then you'll be more likely to experience that failure. However, come 100k miles, you will need to replace a large number of difficult to reach items and May 13, 2022 · The B58 has a higher power ceiling, especially when you are talking about stock turbo vs stock turbo, but that doesn't speak directly to long term reliability. Im looking at down sizing my stable and buying a newer vehicle either a 335i(ewg) or 340i in the near future. N55 sounds a bit better imo but will make less power overall, tuned or not. $20k would be better though. Don’t get discouraged by the internet debates on N55 vs B58. Then depending on the overall layout (angle of the V, cross plane crank, ect), it becomes even more complicated. It also has an ECU that's much easier to crack, compared to Toyotas BOSCH ECUs. -E46/39/53 great old school cars, more reliable being non N55 E90s sell at a premium. if you’re looking for a daily driver with maybe a few mods, go for n55. The B58 has a good reliability reputation because most of them are still low mileage. N55 will get to 400whp+ as well. This is very subjective but I feel the N55 has slightly sharper throttle response (less turbo lag), and a better noise. B58 is the new craze and rightfully so. Depends if you want to mod/tune. That-Volvo-P2-Guy. While the N55 can safely make around 400-450whp on stock internals, the B58 can achieve over 500whp without opening up the engine. 5k shipped. Advantages of the B58 vs predecessor N55 engine: A stronger closed-deck engine block design able to handle more power. ago. But if I were coming from a B58 to an M2 I would want more power than what the N55 can push. The altered bore effectively makes them different blocks at that point. Not sure about the parts. Really, it’s sort of Turbo inline six mkIII. And better in about every way. From an engineering standpoint, V10's are much more difficult to balance the forces than a v8 or v12. Especially since the engineering+reliability is just so much better than the N55 (less potential for gasket leaks, less potential engine issues, etc). Even the B48 is a great engine and more reliable than the N55, due to the modular Toyota wouldn't risk their reputation by using parts that don't match their reputation and history. Here are some tuning capability comparisons: Stage 1 – B58 makes 380-400whp, N55 makes 340-360whp. But, I would for sure take an '18 540 over a '16 350. I’m looking to get a new car, and I have maybe $25k max to spend. Finally we have an ignition coil that lasts. Thé engine is so far very reliable and better than the N55 it replaces and the N54 before that wish was a night mare. Reply reply. 340i / 440i. Both will cost money to keep running and mostly comes down to luck. N55. -N54, good engine when it’s stock, once modified can be a very high maintenance engine, I talked from personal experience. Later n55s got a much more reliable with a new modern hpfp that's not chain driven and a electronic waste gate. 6 Cylinder - BMW B58 or N55 I6. The Supra weighs significantly less than the F30 340i. N55 is still in production and has been for a decade, but you can already find super low mileage B58 engines for ~$3. Reliability wise , id go with the N55 since the engines been around for a while now compared to the b58. B48 is probably going to be a bit more reliable if it was taken care of since tbe n55 is high milage. I wouldn’t sacrifice manual and coupe for slightly better engine. As someone else on this thread had already done an Old/New comparison, here go my personal picks: Old: 4 Cylinder - Honda K20. Fortunately, BMW learned its lesson on the N54 and focused on improving the reliability of its future turbo engines. M235i = N55 (last generation turbo 6, slightly less powerful) M240i = B58 (current generation turbo 6, slightly more powerful) There are also a handful of cosmetic LCI changes starting in 2018 which you may desire. Sep 10, 2023 · Overall, the B48 demonstrates better reliability and fewer repeat faults compared to the N20. The M235i is around 24-25k and the M240i is around 29-30k. N54 HPFP have long extended warranties now ( 10 years ) . The g will obviously get much better mpgs and over all feels like a lighter car. B58 Reliability: is the B58 more The B58 is a completely new and much stronger design than either the N54 or N55. All from personal experience. 0L turbocharged inline-6 engine that was introduced by BMW in 2015. I like the convertible, I like the B58, I like the fact that it’s like $20k cheaper than an M4 but basically just as fast. 2JZ Reliability & Maintenance. I'll concede that DIY work is much simpler on a non turbo engine. Ask technical questions, contribute answers, or show off your ride. 979L) and uses a TwinPower twin-scroll turbocharger, though the B48’s is also a I'd take the 540. And I think it is a pretty good engine. Also newer tech. N55 turbo have max torque at 2k rpm, b58 is close to 2,5k rpm. Obviously time will tell but nothing's cheaper to maintain and repair than a car that doesn't break. Honestly they both sound very similar and almost indistinguishable on the street - a very typical and smooth turbo 6, even catless. The N55 does however consume some oil while the B58 doesn’t, again both engines are at similar mileages. I think I’ve finally decided what car I’m going to get. S58 crankshaft is forged chrome molybdenum heat-treated steel. Icookeggsongpu. It’s a more complex engine than N55 so there could be some expensive maintenance at higher mileage. If you read the engine manual PDF, it has forged crank and connecting rods, and the bearings are coated. B58 >>>>>>>>>>>>>>>>>>>>>>>>> N55. N54 cars are alot cheaper and easier to make power with simple mods, however the fueling system can be expensive. Before, the exhaust manifold and turbo were two separate components. N20 has timing chain issues that are remedied by updated parts, N55 has a cylinder head that may eat itself. You’ll be more busy replacing the cheap plastic when it breaks in areas that could cause catastrophic damage TO the engine. The B58 does have a slight edge as long-term data has shown that BMW 6-cylinder engines fare better long-term than 4-cylinder engines. Jan 23, 2022 · Welcome to Season 2 Episode 13 (S02E13): The B58 replaced the N55 and is currently a very well regarded 3. S55 at 3k rpm. s55 is considered to be a very reliable platform. Sort by: kriswithakthatplays. The M2 sounds incredible and and handles well. I’m not going to track the car more than once every 6 months and the M4 ride is too compromised for a daily driver. It also offers 20% more boost pressure and an increased compression ratio of 11. I’ve personally never seen any hub crank issues, I know once modified is where they have issues. The B58 and all wheel drive pulls like a freight train. The B58 was developed as a replacement for the naturally aspirated N54, which was phased out after 2012. Sep 11, 2023 · Tuning Potential. The past 8 years have demonstrated that both engines are reliable. BMW B58 Overview. 8 Cylinder - Porsche Flat 8. History of my car shows only regular maintenance including brakes, injectors, and spark plugs done at 30k. All versions of the B58 punch well above their weight at just about everything you want an engine to do. 0-liter Turbocharged Inline-6 Engine. N55 just has a more expensive road to big power and at this stage in most N55 cars’ lives will require more maintenance up front. B58 Similarities & Differences Despite their similar design as 3. 0 liter twin turbo inline 6-cylinder. (hpfp, injectors, chargepipe, lpfp, etc). Personally there are a few reasons, wanting the money so need to sell one car. F30 is a sub dedicated to all things 2011 - 2019 BMW 3 series. The engine block is robust, and the injectors, cooling system, and turbochargers hold up well at high mileage. And the B58 has been a very reliable and capable engine to date. Can I afford anything with a b58? Because I know I can find a 335i for around 20k. 17. The N55 was a revolutionary engine during its time, bringing many improvements in reliability over its predecessor. But still better than the N55 over all. When it comes to tuning capability, the BMW B58 clearly wins. N54 is last due to the reliability issues. In terms of reliability. M235i is also a great buy. Dec 11, 2022 · Features That Make the B58 Engine Reliable. N55 is older, requires more maintenance right away, and b58 is newer and requires less changes. B58 vs N55 . I think these engines are very happy reving to 5k. B58s weigh less as much as 25% as BMW integrated turbos into a compact steel exhaust manifold and impellers for faster response and power. The S58, while newer, benefits from BMW’s continuous improvements and That makes it similar to the 2JZ. Also if you’re worried you’re going to miss out on the new CarPlay with the b58 cars, then you can retrofit it onto the 335i for like $280. May 20, 2019 · 4 = Worst. I definetly recommend the B58 as a Sep 21, 2023 · The B58 engine has shown remarkable reliability improvements over its predecessor, the N55. The N55 powered many 3 and 5 Series, X3s, X5s and more from 2009-2018 relatively trouble free, especially when properly maintained. Aside from typical B58 issues, are there any major things to look out for? I plan on doing smaller jobs on my own and have a good BMW Indy shop for other things. There are far more positive stories than negatives. The new g is new so all the issues are not known yet and could be hard to figure out the first time around. BMW N55 vs BMW B58 Share Add a Comment. Mechanically the n55 is great but the electrical is a massive pain. I’m comparing two 5 series from 2019/2020, both similar mileage (edited to add pricing at the bottom) 540i xDrive M550i xDrive. Ik this is a BMW sub, but try to be the least biased you can be. 0L 6cyl motor. If you plan to keep it stock, and if you were looking at the same model year, I would just go for whatever you think looks better. Cracked vacuum lines can cause low boost faults too. 340i vs 330i reliability N20's are safer 2015 and on because they revised the timing chain guide issue. Mustang 5. B58 is superior but my personal opinion if I had the option I’d get an m2 over the m240i. B58 vs. The B58 sounds pretty good, likes revs, strong low end and great top end punch and still gets decent MPG for a big 3. It's not until you get into the 500 range that the N55 would struggle compared. It’s a 3. At that point I would say you could look into an N55 or B58 for a fun balance of reliability and tunability where the N54 is the godfather of bmw tuning and oil leaks lol The block casting is probably the same, but the machining process will be different. As my title indicates, I am looking for reliability information for a G11 740i. N46 is a peace of shit DONT GET IT (320i e92 owner) Ehhhh, both are pretty reliable. It all depends on what u want. 4series gran coupe has flexier chassis, is heavier and is more noisy due to frameless windows. 8 Cylinder - Ford Voodoo 5. The BMW B58 engine is a 3. Great cars ruined by a very critical unappealing characteristic. 0L inline-6 single turbo engines, the N55 and B58 have significant differences. The N52 was probably the best BMW engine in terms of reliability and longevity in my opinion May 30, 2021 · So, S55s are more relative to N55 than B58 to N55. The N52 you get reliably and performance without sacrificing fuel economy. B58 Reliability & Common Issues. I would get another B58 car if I could. The B58 is basically the old 335d Diesel engine but designed for petrol and obviously doesn’t have the diesel parts taped on. It basically has the same trouble areas as the N52, plus the charge pipe cracks and the expansion tank return line leaks. Mar 21, 2024 · N55 engine also meets high emission standards but may not be as optimized as the B58 in terms of fuel efficiency and CO2 output, given its older design and technology. Depends on your goal. Lookin at 2013s-2014s 328i and 335i. Reliability and longevity The car community praises the B58 as one of the most reliable modern engines, also being overbuilt which comes with tuning potential (don't recommend it). I'd go with the m235i because they're going to be significantly less expensive than the m240i as it's a last gen motor (n55). No doubt I’ve heard about that with a few models. I generally keep vehicles between 4-6 years. On occasion I have had to do the valvetronic motor, thermostat, and boost control solenoid. Mar 17, 2020 · The S55 significantly enhanced its reliability over just about every previous M-series engine. B58 is the best because of the car it’s in as well in my opinion. In the BMW N54 vs N55 vs B58 vs S55 fight, the N54 earns the worst score for reliability. Also, the N55 went through a few iterations/variations, as generally speaking the final version of an engine is more reliable than early iterations as they have worked out many of the kinks. A nicely-tuned aftermarket exhaust can improve the sound of the S55 but a good exhaust for the B58 can make it sound amazing. Looking to upgrade my 2013 f30 335i pwg N55 in about a year and a half so I’m trying to set up a budget/savings plan right now. And both sound amazing with just a catback. The B58 is one of the best BMW engines and one of the best modern engines. Minor issues are known, some waterpump stuff which got fixed fast. Starting with the BMW N55 and S55, BMW reliability began to hit an upswing, luckily that reliability carried into both the BMW B58 and S58. See them every day and don't see catastrophic failure very often. 0L 6-cylinder engine. • 2 yr. The B58 is a marginally larger engine — displacing 2,998cc compared to the N55’s 2,979cc — and weighs 18 lbs more, but while making notably more power. M54 vs. I will say though, BMW has been using 0W-20 in their B58s so I would definitely prioritize a car Sep 11, 2023 · Horsepower: The N54 makes 300-335 hp while the N55 is rated at 300-320 hp. Would you guys rather get a M2 with the n55 or a m240i with the b58? Or any other car under 45k? Would prefer a manual experience and want to build the car up pretty heavily over the next few years after. If so is the n54 or n55 decently reliable? Or do I need to get a newer 335i? The ZF8 has been updated as well. 0 easily but the mustang in general sucks Chevy cobalt as well but the interior sucks it’s a shit box. N52 Reliability & Maintenance It’s safe to say that both the M54 and N52 stand as some of BMW’s most reliable and long-lasting modern engines. Cylinder head is 3d printed to optimize coolant and oil flow. Except for the Subaru engine in the GR86. I upgraded from an N55 to a B58 but my N55 really kicked ass. There have been reports of issues, but these tend to be relatively rare. The B58, as far as I know, is more reliable stock than a N55. Highly capable and built for extremes. That's where it's improved. Just how much power they can be modified for, and I have no interested in dealing with the nightmare the n63 can be. Also this is tune dependent. Mainly seeing shredding belts, vanos failures, water pump failures, crank bearings getting shredded. It essentially is the coke vs Pepsi question. I have an n55 and its not issue and b58 is better. They both tune to a heck of a lot more power, but it's quite a bit more expensive for the M276 vs the B58. Mar 21, 2024 · The B58 benefits from modern engineering, featuring a closed deck design, aluminum crankcase, lighter turbocharger, and advanced technologies like VALVETRONIC and Double VANOS. All in all, both of these engines sound great, but the B58 sounds better. However, it lacks the proven robustness of BMW’s N55 3. S58 is an m division engine. BM3. Good luck either way to you and your dad. I don't know if it matters but I'm from the EU and here the difference between the 2 as I would like them to be equipped is about 5k euros. But how different is it from Take that for what you will. If you plan on modding the car to make more power go for the n55, if you don't care about modding n all that go for the b46/48. The B58 also easily makes gobs of power without as much investment The N55 is a better more reliable engine than the N54 was. The n55 seems to have a couple of known issues. I personally have experienced the vanos system failure, with the bolts backing out and shredding themselves. It’s also the best version of the N55, which was only produced for a short time, and is basically an air-cooled S55 at its core - just without the I much rather get the b vs n55 F 10 over all is good. The B58 really is a cumulative development stemming from the early N54 and N55. S58 is substantially better. Tuneability Winner: N55. yes the n20 timing chain issue goes for the 320i, 2015+ doesn't have the timing chain problem. The B58 is the successor to the N54 engine and has been praised for its smoothness and power. 0-liter turbocharged inline-6 engine produced by BMW since 2015. B58 vs N63. •. It has, many times. B58 is the better engine, hands down, but it has the timing chain on the back of the engine which isn't very fun. For example the timing chain is at the back of the engine. And thats no knock to the B58. Discuss! BMW B58 (I6). m235i is the better bang for the buck. Both are single turbo’d inline 6s but with each iteration of BMWs turbo’d motors, they keep getting better with identifying weaknesses from the previous generation and addressing them. Using MHD and happy with it. Actually issues with the n55 are fairly few. It has fully forged internals, it’s built for big power. 0-60 MPH Acceleration: Expect low 5-second 0-60 times from both engines – a few ticks faster in the 335i/335is models. Sep 11, 2023 · The B58 represents a major engineering leap forward compared to previous BMW 6-cylinder engines. -S55, great engine, has reliability of N55 with much more power. N55 is not a reliable engine. Here's the story, I have a 22 Mazda3 and 2016 MX-5 N55 vs. It's better in every single way, it will cost more because it's new but then N54s are a never ending steam of small repairs that all add up to thousands a year so it'll quickly even out. Pretty sure thats not an issue on the b58. And that’s really saying something, because the B58 sets the bar really high to start with. I can't find much actually comparing the N55 vs B58 from a 100% stock reliability standpoint. Reply. The N52, 53, 54 and 55 engines is right around the time when BMW got a lot more technical and computer based with their engines making them a lot harder to swap unless you are doing a engine replacement of the same engine code. The N55 was always more of a "less expensive" replacement for the twin turbo N54 which was asking to be tuned from the get go, and the N20 similarly was designed to replace the entry level N52 which was more or less bulletproof At this point, it is more cost-effective to opt for a B58-powered BMW. Rod bearings can be an issue on engines driven hard before the oil is warm. That means there is a ton of r&d already done. Has more character and I’m partial to the sound over the B58. The N55 engine has been known to experience issues with the high-pressure fuel pump and fuel injectors, while the B58 reliability has had some drawbacks with some reports of timing chain and water pump failures. The B58 has proven to be the most reliable turbocharged BMW engine, perhaps as reliable as the naturally-aspirated N52. Well sure, nothing can really beat a Camry or Accord in terms of “reliability” but that’s comparing apples to oranges. B58 vs N55 upvote G11 B58 Reliability upvote The n55 sounds better, and with the ridiculous low torque on them compared to b58 makes it easy to drift at slow speeds. While the N55 has a higher power ceiling than the N20, it is an open-deck engine without forged internals, and this ultimately limits its maximum power output. B58 is overbuilt. 0 liter (though it’s technically a tad bigger, at 2. Get the 240i and have a blast with it, also it should sound awesome since it's before the noise regulations of The B58 sounds a bit cleaner and more refined while high RPM ranges sound “racier” than the S55. B58 is a beast and will earn its place at the top. I see your b58 and I'll raise you one n47. I still think the B58 is better than the Audi EA839 and Mercedes M256 overall in its category. 998L compared to 2. All problems are known and easily fixed. Both engines are fairly reliable with just regular maintenance. $50 Uber is better than a $900 parking break module. Turned up the boost and modified out the unreliable May 3, 2024 · The B58, in particular, has been praised for its durability, with many owners reporting high mileage without major issues. The B58 has a pleasing if somewhat muted exhaust note. New: 4 Cylinder - Mercedes Benz M139. Not much of a price difference between the used N55s and B58s, so I would go with the B58 X3s. Definitely a massive reliability improvement over the N54 and N55. If you see a flood, drive the other way or park high and Uber. N20 vs. Never dealt with any serious repairs asides from usual maintenance like oil changes every 5k etc. What OP means is that if you got your hands on a B58 and an S58 you wouldn't be able to swap the B58 parts into the S58 block. N52 all the way. 2L V8. May 11, 2022 · Unlike the N55, the B58 features a closed-deck engine design. Not to mention reliability reports bmw as fairly high these days for what it’s worth. B58 is better but it is not THAT much better in the grand scheme of things. I understand the N55 hate and was worried about it feeling slow coming from a modified B58 but it was the opposite experience for me. Great power output and reliability from my experience. MHD easier and better app but don’t create their own tunes, BM3 are the provider and tuner. One other option would be the M2 competition or CS that would get you the S55. The B58 is BMW’s latest single-turbo inline-6, and it has already proven to be a very reliable unit with no major issues. N20 vs n55 reliability. 0:1. N55 Reliability & Common Issues Oct 28, 2015 · Much like the N55, the B58 displaces 3. S55 vs. Top end: Free-spinning all the way to 7200 rpm on the B58 and 8600 rpm on the S58. I'm looking for opinions on the n55 and zf8hp45 vs the b58 and zf8hp50. The difference is the motor. N55 is probably more budget friendly when it comes to cost of purchase. Both great, can’t go wrong with either. Both are amazing engines. On the other hand I’ve heard great things about the B58 being a high Hp engine with good reliability and ability to The B58 in my 240i was far better than the N55 in my M2. And the fact that BMW is even close to Camry level reliability with the B58 is a feat in and of itself. the b58 sounds better though in my opinion. The m240i has an updated turbo inline six (b58). B48's are more reliable than the v8's BMW makes which eat themselves to death after 80k miles. Their simple, tried-and-tested naturally-aspirated inline-6 configuration, and under-stressed stout engine blocks make these two engines incredibly reliable with just basic maintenance and I’ve heard nothing but praise for the b58, but I also know the 335i is a beast. The N20 is actually a very reliable engine in the US midwest. However it has a twin scroll single turbo charger instead of twin turbos (EDIT: Sequential turbos) of the 2JZ as well as a higher compression ratio at around 11:1. Nonetheless, no engine is perfect, and these do have some common issues. Again, I respect your opinion but you’d rub a lot of people the wrong way if you say you laugh at the n55 when you have an n54. B58 a close second due to the slightly less serviceability. I got lucky and bought one off eBay for $30 and asked for a software update which fixed it but if you get aftermarket modules, you need software and knowledge to But of course, YMMV. Lookin 2 buy a f30 but unsure which engine range is most reliable. The m54 engine requires constant attention and has lots of quibly issues. You'd probably have to worry about quite a few expensive maint items. Lots of how-to guides, after market support etc. Have a N55 F30 with 135K and am pretty familiar with the B58. ep3ep3. Aug 29, 2023 · Mid-range: A deep well of power from 3000 to 5000 rpm lets you rocket out of corners or cruise with authority. The n55 is pretty reliable, but not as strong as the b58. Still can’t stand S55 or S58 exhaust notes, even after the equal length midpipes. . Sound. This high-revving nature gives BMW’s signature rush to redline. The N54 is largely responsible for boosting BMW’s reputation in the tuning community and has been out longer than the engines The n55 also sounds better than the b58. The worst an N55 could suffer is spun rod bearings which plagued a few cars before 2014 when they supposedly revised the parts. It was designed from the outset for greater efficiency, power, and reliability than past motors using lessons learned from them. These contribute to its efficiency, power delivery, and performance flexibility. They don’t drive that different in stock form. The BMW B58 is a 3. Real world scenario the B48 can get up to 350hp with bolt ons and tunes where the N52 will struggle to get past even 280hp. Torque: Both motors put down at least 300 lb-ft of torque. n54 is much much easier to tune and more mod friendly, but note the n55 could also easily reach the numbers you're looking for. Both tried and true. B58 if both cars are similarly spec'd and priced. The V10 is the best compromise between power, efficiency, and packaging. If you have a choice between the two and the difference between to Apr 23, 2023 · Both the N55 and B58 engines have been generally well-regarded for their reliability, but there have been some reported issues with both. The b58 is much much much more reliable in every way. Liter for liter may be one of the strongest production motors ever. M440i convertible with xdrive. This is a race spec engine that meets emissions standards. tw ax mk zx dz dv wq fb it re