BMW X5: Integrated Suspension Systems

 Valvetrain

The valvetrain on the N52 introduced in 2006, used 5 mm valve stems on both the intake and exhaust. To increase durability, the exhaust valve stems were increased to 6 mm from 6/06 production. All of the new NG6 engine have adopted the 6 mm valve stem for the exhaust, the intake stem remains at

 Engine-Off / Coasting

Principle Under certain conditions the engine is automatically decoupled from the transmission in the D selector lever position. The vehicle continues traveling with the engine idling to reduce consumption. Selector lever position D remains engaged. This driving condition is referred to as coastin