Bumper.
Suspension Strut Bumper. Auxiliary spring. Buffer. Inner SPRING. Protect sleeve stop. Strut stopper. Suspension Strut.

Suspension Strut Bumper

Fits A4, RS4, S4

A4; Sport Suspension. Passat; w/Sport Suspension. S4, RS4; All. S4, RS4; Sport Suspension. W/heavy duty susp. W/sport susp. W/sport suspension.
Suspension Shock or Strut - Repair or Replace
If your struts or shocks are worn or weak, you may experience problems like an excessively bouncy ride, your suspension bottoms out more easily than it used to, or your vehicle feels unstable on bumpy roads. You may also notice fluid leaking from your strut. If this is the case for your 2006 Audi S4, have a Audi certified technician diagnose and repair your suspension system with factory genuine parts.