What are BMW N55 engine problems?

Among the most common BMW N55 engine problems are leaking valve covers and oil filter housing gaskets, VANOS solenoid failures, and water pump breakdowns. However, all of those can be avoided thanks to proper maintenance and not allowing your engine to overheat.

Is BMW N54 & N55 engine tuning safe?

Yes, the BMW N54 and N55 tuning is safe. Despite some of their early issues, both of these engines are pretty robust, which means they can handle extra power. In addition, due to the nature of their problems, a tuned engine may actually be more reliable than the stock N54 or N55, mostly because of lowered engine operating temperatures. You just have to remember that engine tuning will void the driveline warranty if your car is still covered by it.