This brand new (rear )air strut ,air suspension ,shock absorber fits on the (LEFT) side of (BMW )
.to ensure the maximum security and ride comfort
As well it contribute to the high level of safety.and the level of the vehicle remains stable thanks to the system even with a high lateral inclination in the curves.they adjusts the pressure automatically and there fore secure a constant vehicle level.this effect is quite useful also when you have a high load.