Adaptive damper

At the suspension corners on equipped BMWs.

Controlled valves vary fluid flow according to driving mode and vehicle signals.

A shock absorber with an adjustable tap.

Chassis warnings, a harsh ride or leakage can involve wiring, valves or the mechanical unit.

Wear is condition-based and strongly affected by roads, loads, impacts and seals. There is no universal replacement mileage.

Links and bushings are smaller repairs than complete adaptive struts or air-spring systems; alignment may be needed after work.

BMW passenger cars and SAVs; spring, damper and axle design depend on chassis and options.