The 2011 Bmw 335i remains a popular choice for enthusiasts seeking a blend of performance and luxury. A topic often discussed among potential buyers and owners is the reliability, particularly concerning its N54 engine. Online forums and communities provide valuable insights into real-world experiences, shedding light on what to expect from this model.
One owner’s experience, shared in a forum discussion, highlights some key aspects of 2011 BMW 335i reliability. This owner, looking at used models, noted a listing mentioning a new engine replacement, suggesting potential engine issues at around 115,000 miles, possibly due to rod knock. This serves as a reminder of the importance of thorough inspections when considering a used vehicle.
However, the same owner also shares their positive experience with their own N54-equipped 335i. With 84,000 miles on the clock, their engine has been relatively trouble-free. Minor issues encountered were a blown charge pipe (attributed to performance tuning) and spark plug replacement due to misfires from aggressive tuning. These are often considered normal maintenance or expected upgrades in tuned vehicles rather than inherent reliability flaws.
Preventative maintenance and addressing minor issues proactively appear to be crucial for N54 engine longevity. The owner mentioned a walnut blasting service performed 30,000 miles prior to their post, a common procedure for direct-injection engines like the N54 to combat carbon buildup. They also addressed oil leaks from turbo oil lines and noted minor leaks from the Oil Filter Housing Gasket (OFHG) and Oil Pan Gasket (OPG), considering oil leaks as routine for BMWs. Crucially, their turbos and wastegates showed no signs of wear, and a Pre-Purchase Inspection (PPI) revealed no major concerns beyond the mentioned minor oil leaks.
Interestingly, the owner expresses a preference for the N54’s known minor issues over the N55 engine’s reported rod bearing concerns. This perspective suggests that while the N54 may have its quirks, diligent maintenance can mitigate potential problems, making a well-maintained 2011 BMW 335i with the N54 engine a potentially reliable and enjoyable vehicle. Prospective buyers should prioritize a comprehensive PPI to assess the car’s condition and service history.
