BMW ReliabilityBMW

BMW E90 Reliability

The BMW E90 3-series is a generally reliable car, especially the non-turbocharged models powered by its N52 inline-6 engine. Unfortunately, no vehicle is immune from maintenance issues – nor is the BMW E90!

eEuroParts reported that the N52’s VANOS valve train-related system can fail, with hydraulic lifters starting to rattle after some time on engine starts rattling after some user/BMW subReddit forum users reported. Even though this model offers great solutions for drivers, there may still be some BMW E90 reliability issues .

Here are some possible BMW E90 reliability issues:


The E90 is one of BMW’s most reliable models when it comes to engines that power them, particularly its straight-six N52 unit and twin turbo N54 units that may experience leakage of oil through its turbos and exhaust manifolds.

Water pumps in certain E90 models may become defective, leading to costly repairs. High-pressure fuel pumps could also pose issues; their seals may wear out over time. All of this should encourage you to thoroughly review any used car’s history for any major issues it has experienced in its past.

The E90 was available with diesel-powered powertrains such as the 335d model that provided superior fuel economy than their gas-powered counterparts, yet their emissions systems are often prone to failure; with diesel exhaust fluid (DEF) sensors especially susceptible to melting down, leading to costly repairs for these engines. Due to non-replacable DEF tanks it would be prudent to purchase extended warranties covering these features of these cars.


The E90 BMW 3 Series is a popular vehicle among daily drivers and enthusiasts alike, providing ample comfort, space, and engine options to fit any need or budget. However, as with any performance inspired vehicle there can be some BMW E90 reliability concerns; these could include cooling system issues and oil leakage which tend to appear between 8-14 years of ownership, but with proper care these can be avoided.

When purchasing an E90 3 Series, ensure to conduct thorough research into both its model and year of interest. Certain models such as the 325i and 328i use BMW’s N52 engine – considered one of the most reliable engines ever made according to Bimmer Life; on the other hand, models with N54 twin turbo engines used by M-models such as M3s may experience rod bearing failure according to Jalopnik reports.

Mechatronic units that control transmissions may develop issues after approximately 70,000 miles, leading to limited gear selection and other issues. To avoid this from occurring, it is vital to change oil regularly and monitor all fluid levels. Furthermore, check engine coolant for leaks frequently while replacing thermostat regularly as well. Also ensure the correct procedure is used when extracting key from ignition slot – forceful removal may damage its integrity!


BMW is known for both performance and reliability; evidenced by their E90 3 Series which first debuted in 2005; this model earned them the World Car of the Year Award and has remained one of their benchmark models over time. Still, as with any vehicle this age-group does have some faults – some models more so than others; it is essential that buyers know what to look out for when purchasing used E90 models.

Style and body are pretty satisfied for BMW E90 reliability.

Buyers should first carefully consider which engine they wish to purchase. Entry-level and midrange non-turbocharged versions of the BMW E90 tend to be more reliable than their more powerful counterparts, especially if not given regular oil changes. N52 engines tend to be preferable; those from N46B20 and N47D20 engines should be avoided due to significant oil consumption problems. Also be mindful that Vanos variable valve timing systems tend to wear out after about 70,000 miles due to infrequent oil changes.

There may also be issues with suspension sway bar end links and antilock brake pumps, the ignition key must be taken out in a specific manner and forced in carefully to avoid damaging its slot; and some 17-inch alloy wheels on BMW E90s have been known to develop hairline cracks.


The E90 3-Series was BMW’s fifth generation of their 3-Series vehicle and had to live up to an excellent reputation after the E46 generation became one of its most acclaimed drivers’ cars. Available as sedan, wagon, coupe, and convertible models with distinct combinations of features; each body style offered superb handling as well as luxurious interior.

We have to look at the interior details for the best BMW E90 reliability examination . Once the possible interior issues with BMW E90 reliability were detected, it won’t be any big surprise in a negative way.

The BMW E90 provides drivers with numerous customization options, from creature comfort add-ons and performance upgrades, to creature comfort add-ons. This makes the BMW E90 one of the most customizable and adaptable used BMWs on the market today.

When purchasing a BMW E90, be sure to look for one with low mileage and no prior accidents. Aim for one with around 60,000 miles on its odometer – that way you will ensure you receive optimal value and reliability for your money. This should be considered for BMW E90 reliability.

If you’re on the market for a BMW E90 with a turbocharged engine, be wary of those built prior to 2009. BMW’s N52 twin-turbo engine had a reputation for unreliability issues such as turbo failures and blown heads; its successor, the N55 single-turbo engine took a step backward in terms of horsepower/torque but improved reliability significantly.


Are BMW E90 models reliable?

Although it depends on usage and maintenance history, it can be said that most E90 models offer great outputs for reliability. BMW E90s, which have not undergone any unusual maintenance and have average usage times, offer great reliability compared to their counterparts on the market.

Should I buy a used BMW E90, or is a newer model a better choice for reliability?

If you have a budget for this, yes it may be reasonable. However, well-maintained and used BMW E90 models could still offer good reliability.

Juan Gibson

Juan is an automotive engineer and an avid car enthusiast. He has over 15 years of experience in the car industry. In my free time, I write blog posts about cars, models and etc.

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