Question: Critical ground connections on a C4

[TedC]

According to a recent CE magazine write-up on a C4 rebuild, there are more than 17 such grounding points. So where are the top three to five critical connection points that we all should make sure are clean and tight?

 

[geekinavette]

Well of course they are ALL important...but the rear of the driver's side cylinder head and transmission bell housing (same side) seem to be common failure points (sensor grounds). Maybe from the engine moving around so much?

Bill

 

[Robertwav1]

Under the hood, look along the frame rail on both sides of the car. Several ground locations also.