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.
![](https://nineauto.com.au/wp-content/uploads/2018/11/bumpstop-torn-1024x577.jpg)
The good news is that these rubbery cylinders are inexpensive at around $40 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 dependent on the Porsche Model.
![](https://nineauto.com.au/wp-content/uploads/2018/11/bump-stop-installed-768x1024.jpg)
Bill Gray says
I’ve just purchased a 997 with 70k on the clock and find it very noisy on Sydney’s notoriously bad roads – even cats eyes produce a knocking sound, and the knock intensifies over rough patches. Is this likely to be my bump stops or bushes in the suspension needing replacement?
mr. says
Hi Bill,
It would be great to have a listen and diagnose in person…
What you’re describing is most likely to be caused by the sway bar drop links or castor arms.
Stuart
Bill Gray says
Thanx Stuart, have booked it in to Autohaus Hamilton.
Bill Gray says
Greetings all. I’ve just got back into a 911 (997 with 70k on the clock) after having owned a ’67 S back in the 80s. How different they are! A quick question: the 997 produces a hollow knock on Sydney’s notoriously bad roads – even over cats eyes – and I’m wondering if the bump stops are failing or would it be bushes elsewhere in the suspension? Any thoughts appreciated. Cheers, Bill.