N55 reliability

F15 X5 Reliability. In the past decade, BMW has made some solid improvements to engine reliability. The N55 35i X5 models are likely the least reliable of the group. However, even the N55 is a respectable engine aside from a few common oil leaks and cooling system issues. BMW’s N20 engine has some common issues with the timing …Dec 26, 2023 · Must-Have BMW N55 Upgrades For Performance & Reliability. BMW ’s N55 engine was the Bavarian’s powerhouse of the 2010s and has since become a tuner’s delight. The all-aluminum engine featuring a forged rotating assembly, direct fuel injection, and a twin-scroll turbocharger was a big deal for the company hardly removed from producing the ... The fuel injectors in the N55 were changed to the ones using the Bosch solenoid valves from the piezo-style HPI injectors that the N54 used. The reasons for this change are primarily cost and reliability, even though the piezo-style does burn leaner. 5. BMW’s Variable Valve Timing System The N55 is much closer to the N52 in reliability than the N54. It basically has the same trouble areas as the N52, plus the charge pipe cracks and the expansion tank return line leaks. Rod bearings can be an issue on engines driven hard before the oil is warm. I've personally never had an N55 rod bearing issue in front of me but the reports are ... BMW N20 engines are found in the 320i and 328i models with 181hp and 241hp, respectively. The N20 delivers decent reliability. It’s an improvement over the larger N55 engine which was designed a couple years prior to the N20 (the N55 was also used in the older E90 3-series). N55 engines are found in the F30 335i with 300hp and 300 lb-ft …The first iteration of the S63 engines had an older VANOS system, which had poor performance and had issues at higher mileage. Starting in the S63TU, BMW started using the same double-VANOS system as the N55, and this change greatly improved performance as well as reliability. 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. It's not until you get into the 500 range that the N55 would struggle compared. N54 HPFP have long extended warranties now ( 10 years ) . While each engine has its own quirks, I'd go for the n54 almost always over the ...Dec 31, 2015 · BMW N55 straight-six engine. The inline-six engine has all but died out, aside from the Bavarians, though. Packaging and cost have brought about the mass use of V6 engines to replace the I6, as V6 ... Nov 6, 2013 · 137 posts · Joined 2013. #10 · Nov 7, 2013. I did the opposite, started off considering the N20 and went with the N55, and I don't regret it at all. The price difference is negligible once you account for the options you have to add to a 328i anyway, and I never have to wonder if I should have gotten a 335. If you do some research the N55 will be a bit more reliable than N54s, but the N52 is the clear winner. The N55 needs it's fair share of maintenance, and if the common problems are addressed I do not see why you should not have a reliable engine. Water pump, PCV, Charge Pipe, vcg, ofhg, opg gaskets and checking the rod bearings come to …Dec 12, 2023 · The N55 engine is generally considered to be a reliable engine that can last for many miles if properly maintained. In many cases, we would say it’s more reliable than the N54. In this ultimate N55 engine guide, we’ll cover everything you need to know about the 3.0L turbocharged inline 6, including N55 engine specs, popular N55 engine …SANTA CLARA, California, April 22, 2020 /PRNewswire/ -- In a move calculated to make a dent in the data protection landscape, leading data managem... SANTA CLARA, California, April...If you’re in the market for a used engine, you know how important it is to find one that is reliable and in good condition. With so many options available, it can be overwhelming t...The N55 is much closer to the N52 in reliability than the N54. It basically has the same trouble areas as the N52, plus the charge pipe cracks and the expansion tank return line leaks. Rod bearings can be an issue on engines driven hard before the oil is warm. I've personally never had an N55 rod bearing issue in front of me but the reports are ...The definition of a reliable source is any source that has competence in the field of interest, without any biases or conflicts of interest related to the topic. Finding reliable s...Reliability Winner: N55. N20 vs. N55 Exhaust Sound. The N55 engine is widely regarded as one of the best-sounding BMW inline-6 engines, and the best-sounding turbocharged inline-6. It outputs a smooth, refined exhaust note that more than satisfies those who love the sound of the straight six and those who love the sound of a turbo engine. Are you in search of a reliable gas fireplace dealer near you? Look no further. In this article, we will guide you through the process of finding the best gas fireplace dealers in ...In this ultimate N55 engine guide, we’ll cover everything you need to know about the 3.0L turbocharged inline 6, including N55 engine specs, popular N55 engine …However, the N52 still has its fair share of common reliability problems. We’re going to address the 7 most frequent engine issues the N52 experiences. Due to the engine design, the BMW N52 has proved more reliable than its bigger brother, the N54. Because the N52 doesn’t have an HPFP or direct injection, these are two common N54 …I have a 2014 535d and so far has been very reliable. The only problem I see on line is the high pressure fuel pump. Most people believe the pump fails because there is water in the fuel. BMW has extended the warranty to 100k/10years . However, BMW's in general requires more maintenance and will have more small problems compared to …In this guide, we’ll provide a comprehensive overview of the 3.0L twin-turbocharged BMW S55 inline-6, outlining its specs, upgrades compared to the BMW N55 off which it is based, its overall reliability, and some of the most popular S55 performance modifications.. BMW S55 Engine Specs. Engine: BMW S55 Engine. Configuration: Inline …BMW N55 Reliability. If BMW understood the N54 would be capable of dealing with as much power as it was eventually pressed to by the tuning neighborhood, we are not sure. One thing BMW understood for sure, though, is the N55 needed to offer better reliability. The high-pressure fuel pump concerns that pestered the N54 was still a …While the N55 has a pretty decent reputation for reliability, there are still some problem areas with the 3.0L turbocharged inline-6. Due to their many similarities, the N55 shares quite a few common problems with the N54. N55 oil filter housing gasket leaks, valve cover gasket leaks, PCV valve failures, and water pump failures are all common …If you own a Ryobi power tool, you know how important it is to have a reliable repair shop nearby. Whether your Ryobi tool is in need of maintenance, repair, or replacement parts, ...The N55 or B58 engines mated to the 8HP are capable of some serious power; these transmission upgrades will ensure their reliability and longevity. ZF 8-Speed Transmission FAQ Is the ZF 8-Speed Reliable? We’re asked this question a lot, so we’d be remiss not to address it directly. ZF had plenty of data to use from their previous …In today’s digital age, it has become increasingly important to verify the reliability of news sources before consuming and sharing information. With the rise of online news platfo...Choice Hotels are squarely in the mid- and lower-tier group of hotel chains. But look closer to find hidden gems. Let's take a Choice Privileges deep dive! Increased Offer! Hilton ...So some exciting news for us n55 guys, pure turbos just launched their new pure 500 and pure 750. Both options appear to be custom housing and chra so no need for a core exchange. I do hope they use good chra's so there are no reliability issues though.BMW N55 Reliability. We covered the BMW N55 engine problems, now let’s take a look at the overall reliability of this engine. Is this a reliable engine? The short answer is yes. This engine when it comes to …BMW N54 vs. N55 Comparison: Horsepower, Reliability, and Tune-ability. Next. The 7 Fastest N54’s in the World: 135i, 335i, 535i Horsepower Records. Similar Posts. Pin. N54. BMW N54 Ultimate Data Logging Guide – JB4 Data Logging. By Zach Mayock December 15, 2019 July 18, 2023. We recommend Burger Motorsports JB4 tune not only …N54 vs. N55 Engine Reliability: Which Is More Reliable? When discussing the N54 and N55, this is usually a contentious issue. Simply said, the N55 is more trustworthy. BMW's N54 was the company's first mass-production turbocharged gasoline engine in decades. Given BMW's current lineup, which is primarily turbocharged, I feel it …BMW N55 Engine. 1-series models with the N55 engine include the 2011-2013 135i and 2013 135is. The N55 offers the same 300 horsepower and 300 lb-ft of torque as the previous N54 engine. However, BMW took a step down in aftermarket potential in favor of working on reliability. The N55 135i is still capable of 400+ horsepower with a …Dec 26, 2017 · 19,500 Miles. 2013 335is. Silver Metallic, black interior, fully loaded. I'm just looking for some feedback from 335is owners about the car. I test drove it this weekend with the owner and found the driving experience intoxicating. The DCT is incredibly fast, the car sounds amazing and the overall feel was sublime. Just wondering the reliability of the old m2 models before the m2c production. I know it has the n55 motor. What were some common problems unique to that motor without a tune ? Appreciate 0 Tweet. Quote 01-29-2023, 11:13 PM #2: RAM_F30_F87. Lieutenant . 195. Rep. 430. Posts. Drives: 2017 M2 LBB 6MT; 2012 328i …It’s a toss up between the N55 and the N20. N63 is more problematic overall, but I haven’t seen many just lock up Reply reply More replies More replies More replies. StevieG63 • The early ones had a major recall although it wasn’t officially called that. I had a 2012 X5 50i at the time and the dealership had the car for over a week. The service report was pages …MHD stage 2 + map. New plugs one step colder. New Coils. BMS metal charge pipe. This are commons mods so wondering what other N55 owners experience is with reliability ? Can our motor handle this HP. Should be about 340 HP. Have 95ks on the clock. It’s a DD doing about 15ks a year.1) N53 High Pressure Fuel Pump (HPFP) This is the first common and most prevalent issue to come up with the N53. High Pressure fuel pumps were such an issue when the engine first came out that BMW issued a recall on the engine. The N53 uses the same HPFP as the BMW N54, and these issues are well documented. The high pressure …Jun 11, 2022 · The N54 is more tuner-friendly. BMW’s N54 twin-turbocharged engine actually comes to life when customized; I do not intend to suggest the N55 is anything but impressive when customized. The N54’s twin turbo design merely moves more air and does so more effectively. Mod for mod the N54 will outperform the N55. Yes, the B48 has an above-average reliability and doesn’t have major failure points, but still requires maintenance and attention in some areas. Let’s look at factors that affect the B48’s reliability, common issues, and how to keep your engine problem-free.For those of you keeping track at home, with the Turner Motorsport Intake, Software Module, and Stepped Intercooler, your N55 should be pushing 120+ more horsepowers than it did from BMW, all with the reliability and drivability left uncompromised thanks to the bolt-on nature of the parts and a conservative tune. This leaves us with only two more spots to …Nov 12, 2021 · BMW N55 — Turbocharged Reliability. The BMW N55 is a turbocharged 3.0L inline-six engine that debuted in 2009. It had big shoes to fill as it was introduced to replace the successful N54 — BMW’s first mass-produced turbocharged engine. The N55 featured multiple changes, most of them implemented to make it a more reliable unit than its ... On the other hand, BMW designed the B58 as the direct successor of the N55, powering many vehicles ranging from the 2-Series M240i to the gargantuan X7 40i. Similarly, it has been regarded as a significant improvement over its predecessor in terms of power delivery, reliability, and tuning.I'm buying a 2011 135i w/ DCT this weekend. The car has 45,000 miles and has only 1 month left of the factory warranty. The car checked out with "flying colors" in my PPI. I have done a bit of reading on the N55 vs N54 reliability, but most threads out there are a few years old at this point. Now that the N55 has been around for 3-4 years I ...BMW N63 Reliability. The N63 engine is an exceptional one, yet it still can present some challenges. These include oil consumption, fuel injector failure, battery draining and worn valve stem seals. Many of these issues can be avoided with proper maintenance and system upgrades, saving both money and headaches in the long run.This is the same displacement, bore, and stroke as the BMW N54 before it, and it also features the same 10.2:1 compression ratio. The S55 is just a high-performance version of the N55, meaning it carries a lot of similar parts and design features from the N55. According to BMW, the N55 and S55 share 75% of their engine components and 25% of …N55 Reliability . Within the next few months Im looking to buy a 2012-2016 F30 335i 6MT (If i can find one) The ones in my price range up to 22000 CAD are fairly high mileage with most of them being at 150000 - 170000KM. Is it worth spending a bit more for lower mileage even if it is a 9AT which i don’t prefer? ...In an experiment, reliability signals how consistently the experiment produces the same results while validity signals whether the experiment measures what it is intended to measur...Are you in need of a phone repair but unsure where to start? With so many options available, finding a reliable phone repair shop near you can be overwhelming. Luckily, we’ve put t...Plus de durite, plus de chauffe dans le compartiment moteur et peut etre moins de fiabilité au final . Sur le moteur S55 la pompe a eau est mécanique entrainé par courroie et sur le S55 elle est electrique . LE S55 a un refroidissement intercooler a eau et sur le N55 c'est a air simplement . Le defaut du S55 semblerait etre la casse du ...N55 vs N57 reliability. I am well aware that these are 2 completely different engines. N55 is a petrol, while the N57 is a diesel engine. Im considering getting the N57 because its a diesel. Good mileage, and pretty sure they run forever if maintained properly; but unlike its older, bulletproof brother, the M57.For over a decade, BMW N55 was one of the main engines that BMW has used in it's cars. Overall, it's a good engine, but of course there were some early issue...Jul 30, 2021 · The N55 engine is a turbocharged inline-six that replaced the N54 in multiple models from 2009 to 2017. It produces 20 more horses and better fuel economy than the N54, and has a Valvetronic system and a lower-pressure fuel system. However, it also has some common issues such as valve cover gaskets, water pump, and VANOS solenoids that can affect its reliability. The N55 comes highly rated minus some known problems (charge pipes, etc) if you don’t plan on modding it, and there’s not much else that seems to reliably go wrong, outside of normal car shit. Cars are always a crapshoot in the end - what some people get 200k worry free miles out of is another person’s car that needs five figures worth of ... Are you in search of a reliable gas fireplace dealer near you? Look no further. In this article, we will guide you through the process of finding the best gas fireplace dealers in ...My 2011 N55 has 183,000+ miles, and 100,000 of those have been with a Pure Stage 1+tune. The car is probably making around 330whp/400tq. Overall, the car has been pretty reliable. The only thing I’ve had to replace on the engine was the water pump (twice) and the oil filter housing gasket. I’ve also replaced the plugs and belt, but I ...We look at 14 of the best mods and upgrades for your N55 engine and we talk about tuning them to 400, 500 and over 800hp. This video will show you where to s...N55 vs N57 reliability. I am well aware that these are 2 completely different engines. N55 is a petrol, while the N57 is a diesel engine. Im considering getting the N57 because its a diesel. Good mileage, and pretty sure they run forever if maintained properly; but unlike its older, bulletproof brother, the M57.If you own a Ryobi power tool, you know how important it is to have a reliable repair shop nearby. Whether your Ryobi tool is in need of maintenance, repair, or replacement parts, ...If you’re in the market for a used engine, you know how important it is to find one that is reliable and in good condition. With so many options available, it can be overwhelming t...N55 M2 Reliability. Hey everyone! Right now I am looking at buying either a new Type R or a Used 2017/2018 M2. Unfortunately, it is difficult to find a Type R for MSRP which is why I started looking for used M2s. I was just wondering about the reliability and maintenance costs of this car. If anyone has had a major issues I would love to hear ...Finding a reliable art appraiser is essential when you need to determine the value of a piece of artwork. Whether you’re looking to sell a piece, insure it, or just want to know it...May 20, 2019 · 4 = Worst. In the BMW N54 vs N55 vs B58 vs S55 fight, the N54 earns the worst score for reliability. Fortunately, BMW learned its lesson on the N54 and focused on improving the reliability of its future turbo engines. The N54 is largely responsible for boosting BMW’s reputation in the tuning community and has been out longer than the engines ... Sep 19, 2017 · Hey everyone! Opening this thread to see how reliable has been the n55 engine to everyone here in the forum. I've recently moved from an n54 platform to an N55 (feel like it was a mistake) for "reliability" purposes but now that i got mine i did a little bit more research and i've been finding a lot of people with engine rod bearings going bad on them. If you want massive power, you’d be better off putting that money in an N54/N55 car. If budget allows, consider a B58 or S58 powered BMW such as the M340i or M3 as these provide ultimate performance. For lovers of the classic NA straight-6, you’d be better off spending that money on reliability and suspension mods for your M54 or N52 BMW.Jul 5, 2023 · The BMW N55 engine has generally shown good reliability, although there have been reported issues with the high-pressure fuel pump, valve cover and gasket le... N20 vs n55 reliability . Lookin 2 buy a f30 but unsure which engine range is most reliable. Lookin at 2013s-2014s 328i and 335i. Locked post. New comments cannot be posted. Share Sort by: Best. Open comment sort options. Best. Top. New. Controversial. Old. Q&A. Add a Comment. Gagurass • In my experience BMW engines are the last part of the car to be …This is the same displacement, bore, and stroke as the BMW N54 before it, and it also features the same 10.2:1 compression ratio. The S55 is just a high-performance version of the N55, meaning it carries a lot of similar parts and design features from the N55. According to BMW, the N55 and S55 share 75% of their engine components and 25% of …Jun 25, 2014 · The 3.0-litre straight-six with BMW TwinPower Turbo technology wins its fourth title and the MINI 1.6-litre four-cylinder turbo unit its eighth in the world's leading engine competition. Jun 11, 2012 · Sonicendeavor. 1986 posts · Joined 2013. #7 · Nov 16, 2015. The N55 has proven to be reliable. There are one-off exceptions of course, but there haven't been any common problems like the N54 hpfp or the various N63 problems, or the N20 recalls. I'm not aware of any N55 recalls at least over the past three years. Nov 8, 2020 · 91 octane: 320-330whp / 350-360wtq. 93 octane: 330-340whp / 355-365wtq. Expect N55 bm3 stage 1 horsepower in the ballpark of 310whp to 335whp. Again, the peak power gains may not sound overly impressive but there are bigger gains to be had in the mid-range. It’s also not too bad for a conservative tune. The N55 is much closer to the N52 in reliability than the N54. It basically has the same trouble areas as the N52, plus the charge pipe cracks and the expansion tank return line leaks. Rod bearings can be an issue on engines driven hard before the oil is warm. I've personally never had an N55 rod bearing issue in front of me but the reports are ...N55 M2 Reliability. Hey everyone! Right now I am looking at buying either a new Type R or a Used 2017/2018 M2. Unfortunately, it is difficult to find a Type R for MSRP which is why I started looking for used M2s. I was just wondering about the reliability and maintenance costs of this car. If anyone has had a major issues I would love to hear ... Are you in need of a phone repair but unsure where to start? With so many options available, finding a reliable phone repair shop near you can be overwhelming. Luckily, we’ve put t...Drives: E90 335i M-Sport LCI. Join Date: Oct 2018. Location: East Bay Area, CA. iTrader: ( 0) Pure Stage 2 100K mile N55. I am considering getting the pure stage 2 upgrade for my e90 N55 sedan. I'm at close to 100k miles and I'm wondering if you all think it's still worth the investment. I have a shop I trust and they quoted me a pretty good price.Any input would be great ! Any increase in power will cause more stress on some parts, namely the turbo in our case. With the upgraded downpipe I would just go stage 2. There won’t be much more wear on parts between stage 1 and 2. Bigger difference is between stock and a tune.I have a 2014 535d and so far has been very reliable. The only problem I see on line is the high pressure fuel pump. Most people believe the pump fails because there is water in the fuel. BMW has extended the warranty to 100k/10years . However, BMW's in general requires more maintenance and will have more small problems compared to …N54 vs N55 reliability. The N55 is more reliable than the N54 as many of the issues that plagued the N54 were resolved. However, the N55 does still suffer from some of the same costly issues as its predecessor. The N55 first went into production in 2009 as a replacement for the N54, and performance-wise was very similar. BMW N55 engineReliability Winner: N55. N20 vs. N55 Exhaust Sound. The N55 engine is widely regarded as one of the best-sounding BMW inline-6 engines, and the best-sounding turbocharged inline-6. It outputs a smooth, refined exhaust note that more than satisfies those who love the sound of the straight six and those who love the sound of a turbo engine. Any input would be great ! Any increase in power will cause more stress on some parts, namely the turbo in our case. With the upgraded downpipe I would just go stage 2. There won’t be much more wear on parts between stage 1 and 2. Bigger difference is between stock and a tune.Sep 19, 2020 · The Basics. To cover some basic information, the BMW N55 is an all-aluminum 3.0L straight-six engine with dual overhead cams, variable valve timing, and variable valve lift. Bore measures at 84mm and stroke at 89.6mm. This brings the total displacement up to 2,979cc. This is the same displacement, bore, and stroke as the BMW N54 before it, and ... Nov 18, 2016 · N55 remedied a few of the big issues that the n54 had. Injectors are a new design, the hpfp is the same but is at least a later revision part number, the oil pickup was redesigned to reduce starvation issues and frothing, blowby ports were added to the head to prevent carbon accumulation on the valves, and coolant passages were revised to have greater control over cylinder head temperature and ... The N52 engine’s peak torque of 232 lb-ft comes at a modest 2,750 RPM and remains almost constant up to the redline. Torque figures are also similar on the N53, with a peak of 236 lb-ft at 2,750-3,000 RPM, a marginal improvement over the N53. Despite the very similar power figures, the N53 is the more powerful and responsive engine out of ...Buying N55 w/ high km, reliability? Hey all - Looking at buying a 6MT 435xi or m235i as a daily driver and was hoping to get some advice. I know a good service history is important, but what are some other things to look out for when buying a 2015 435xi with 100k miles on it for example. ...When it comes to finding a reliable manufacturer for your business, there are certain qualities that you should look for. The right manufacturer can make a significant difference i...Jun 25, 2014 · The 3.0-litre straight-six with BMW TwinPower Turbo technology wins its fourth title and the MINI 1.6-litre four-cylinder turbo unit its eighth in the world's leading engine competition. The N55 comes highly rated minus some known problems (charge pipes, etc) if you don’t plan on modding it, and there’s not much else that seems to reliably go wrong, outside of normal car shit. Cars are always a crapshoot in the end - what some people get 200k worry free miles out of is another person’s car that needs five figures worth of ... 2015 BMW 335i N55 reliability and modding. Build Help. I'm looking into my first car and the more I looked into the n54 I kept hearing about reliability issues even though it's very easy to get power out of the car I decided on trying the newer models. I'd like to know what type of issues I run into with a 2015 n55 and what type of mods I'd ...BMW reliability seems to be trending in the right direction, though. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. Toyota is also using the B48 engine in their Supra models. They did tweak the design a little bit, but it’s still a testament to the reliability of the B48.LG refrigerators are reliable with bottom-freezer and top-freezer models, but reliability surveys mark side-by-side fridge and freezer LG designs as being repair-prone, according t...35i has a n55 engine which is produced from 2009 till nowadays and it's one of the most reliable engines currently BMW has. Can't go wrong with it. 50i is another story - you don't need that power for a beater car lol . Appreciate 0 Quote 03-03-2018, 07:50 PM #4: snowmuch. Second Lieutenant . 104. Rep. 254. Posts. Drives: 2016 Macan Turbo. …LG refrigerators are reliable with bottom-freezer and top-freezer models, but reliability surveys mark side-by-side fridge and freezer LG designs as being repair-prone, according t...I google "n55 vs n54 reliability" gathering information from all possible sources, what else i can do. Appreciate 0 Quote 01-26-2017, 12:10 AM #4: BeastMode335i. Maximus Decimus Meridius. 1125. Rep. 4,579. Posts. Drives: F30 335i . Join Date: Apr 2014. Location: Down South. iTrader: ...The S55 significantly enhanced its reliability over just about every previous M-series engine. And the B58 has been a very reliable and capable engine to date. 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. After the first 4 years in operation under the ...BMW N55 Reliability & Common Problems BMW N55 vs N54 Introduction BMW launched the N55 engine as a successor to its not-so-reliable N54 which was launched back in 2006. Let’s start off with a …BMW N63 Reliability. The N63 engine is an exceptional one, yet it still can present some challenges. These include oil consumption, fuel injector failure, battery draining and worn valve stem seals. Many of these issues can be avoided with proper maintenance and system upgrades, saving both money and headaches in the long run.35i has a n55 engine which is produced from 2009 till nowadays and it's one of the most reliable engines currently BMW has. Can't go wrong with it. 50i is another story - you don't need that power for a beater car lol . Appreciate 0 Quote 03-03-2018, 07:50 PM #4: snowmuch. Second Lieutenant . 104. Rep. 254. Posts. Drives: 2016 Macan Turbo. …I'm buying a 2011 135i w/ DCT this weekend. The car has 45,000 miles and has only 1 month left of the factory warranty. The car checked out with "flying colors" in my PPI. I have done a bit of reading on the N55 vs N54 reliability, but most threads out there are a few years old at this point. Now that the N55 has been around for 3-4 years I ...The N55 engine is a 3.0-liter inline-six turbocharged engine that produces If you are looking for a powerful and smooth engine for your BMW, you might have heard of the N55 engine. This engine was introduced in 2009 as a replacement for the N54 engine, which had some issues with reliability and fuel efficiency.This forum seems to has the most extensive details for N54 or N55. The 2010 is the the one i would like but the mileage is pretty high. 1) 2010 X6 Xdrive35i - N54 engine with 6 speed. (twin turbo) Downside - 62k miles. 2) 2011 X6 Xdrive35i - N55 engine with 8 speed (single turbo) 30k miles. Price are almost the same. Questions.Nov 18, 2016 · N55 remedied a few of the big issues that the n54 had. Injectors are a new design, the hpfp is the same but is at least a later revision part number, the oil pickup was redesigned to reduce starvation issues and frothing, blowby ports were added to the head to prevent carbon accumulation on the valves, and coolant passages were revised to have greater control over cylinder head temperature and ... | Cgashjfw (article) | Mbmlox.