These small rubber cones are probably up there with brakes and wiper blades as one of the most commonly replaced parts on a Porsche. Judging by appearance, the humble bump stop looks like a very basic part, however the role it plays in protecting your suspension and improving your ride is significant. Without bump stops, or with torn bump stops, if your wheel hits a bump your suspension can bottom out putting expensive suspension parts at risk of damage. Essentially a healthy bump stop is your last line of defence in protecting your suspension components and axle. In addition, bump stops also aid the function of suspension springs, so driving your Porsche with damaged bump stops can impact how your car rolls and pitches, and its overall balance.
The good news is that these rubbery cylinders are inexpensive at around $35 a bump stop. The cost associated with replacing a torn bump is really driven by labour costs, as bump stops can be tricky and time consuming to replace. How long it takes to replace torn bump stops is dependent on the Porsche model you own and how many bump stops need replacing. It’s normally the front bump stops that require replacing as they work harder than the rears. Front bump stops take on average 2 hours to replace and rears can take up to 3 hours.