I have a knocking/rattling noise coming from the suspension when going over bumpy ground

This is a common issue on all 986, 996, 987 and 997 models. If you find that it only occurs when going over small, bumpy, uneven road surfaces – for example, a cobbled road (plenty of them in Yorkshire to test it on), then it is more than likely going to be the front or rear “tuning forks” (or control arms).

It’s not a big job to replace these and it’s always recommended to replace them in pairs, if one has worn to the point of rattling, the other won’t be far behind if it isn’t rattling already.