The M54 is the most reliable BMW engine ever built. Here's why:
* The camshaft chain drive and the V-belt drive are maintenance-free and designed for the life of the engine.
* Valve clearances are kept consistent throughout the entire running life of the engine by a self-adjusting hydraulic valve clearance mechanism. There is no need to adjust valve clearances, ever.
* There is no need to reset the clutch since it is self-adjusting.
* The air filters and spark plugs only have to be replaced after 100,000 km or 62,000 miles.
* The oil in the transmission and final drive is a lifetime filling not requiring any replacement.
* There is no need for any particular running-in service.
* The BMW Service Interval Indicator informs the driver of the remaining distance until the next oil change. You no longer have to change the oil after a fixed, rigid mileage.
* The engine is able to adjust automatically to all fuel grades between 87 and 98 octane.
* Anti-knock control automatically adjusts the engine's running conditions to the respective fuel grade and quality.
* Please note that the engine's maximum output is only achieved when running on 98 octane premium fuel.