Over time, with a lot of modern BMWs, especially the ones with a plastic construction, oil leaks can pop up suddenly with little to no warning signs. The next minute, a perfectly healthy engine has turned into a driveway embarrassment.
Usually, when owners are busy researching common maintenance parts such as the BMW F20 oil filter base replacement, they may then discover that this weak point is common to a number of BMW engines. This wasn’t an isolated incident.
Which BMW Models Are Most Affected?
Some of the most common cars to suffer from this problem are those that come with BMW’s N20 and N26 turbocharged 4-cylinder engines. These include 1-series cars like the F20, 3-series vehicles like the F30, and the X1. The earlier E-series cars that share a similar design of housing, like the E84 X1S, are also susceptible to the gasket and housing failing over time.
The nature of the failure is typically caused by heat cycles. The plastic housing heats up, and it cools down, and the rubber of the gasket hardens over time. Eventually, it will leak oil. The oil generally leaks either on the alternator or down the front of the engine.
Typical Symptoms
Drivers may notice oil smells after a spirited drive, fresh oil around the housing, or their oil level cuts dramatically from one service to the next. The more entertaining problem happens when the oil cooler gasket fails. The oil cooler circuit on the N54 is plumbed through the oil filter housing, and if there is a gasket failure, there is no separation of oil from coolant.
Replacement Reality Check
Oil filter housing replacement is not the most glamorous job, but it is an important one. Most seasoned techs will recommend replacing the oil filter housing and its gasket as an assembly. The area should be checked for related oil contamination, and the time saved by replacing the filter housing can be spent on a thorough coolant inspection and evaluation of other sealing surfaces.
Final Thoughts
BMW engines are incredible machines, and they definitely reward attentive maintenance. Throughout your stewardship of your turbocharged inline-six, even dozens of miles’ worth, many oil changes, and pretty much any track day, you’ll service the car and replace normal-wear items. For as good as this entire generation of BMW engines is, the oil filter housing gasket’s failure to remain sealed is among the ones that no owner, at any price, will long abide. Through preventive steps, you can have 80,000 or 160,000 miles of gasket-sealed contentment rather than another unnecessary conversation about fixer-upper cars.
