Gtrust

I’m trying to trace a leak at the rear. Car drops about 1cm overnight equally at the rear, it will go completely down over a week. I put the car into jacking mode in the hope that I’d see just one side go down but again both fell equally. It seems like too much of a coincidence for both bags to go at the same time. I want to narrow down the issue before it goes to the garage. Any pointers on what it’s likely to be and any way to confirm? Thank you for any help. Car is a 2013 958 TT with 80k on it which I’ve owned from new.

jayi836

This is not normal if you have a good scan tool you can monitor the drop

RAudi Driver

From the op's statement, I don' think he has a scan tool and if so, probably not the one you're posting up screen shots of. Heck, I don't know what that is. PIWIS?

Gtrust

I have a pretty basic scan tool that won’t give me that information unfortunately. Either way I can visually see what’s happening and have manually measured it. Both rears drop equally so either there is a huge coincidence that both have started leaking at the same time and by the same amount of there is a part that has failed that is allowing both sides to drop. That’s the but I’m trying to figure out

RAudi Driver

I don't know how the valve block works so you're need Garrett to chime in. He's got a bit more knowledge than I on this platform.