2018 Buick Regal - Brakes and suspension aging

  1. rear brakes are not cleaning disc, why?
  2. go over bumps and car sounds very clunky, like shocks aren’t doing their job. Car is a Regal Tour x

The first 2 are recalls for your brakes. and the bottom link is a service bulletin which is probably your clunk.

RCSB-18V576-6718.pdf (nhtsa.gov)

RCLRPT-22V465-3881.PDF (nhtsa.gov)

05-03-08-002I 1…4 (nhtsa.gov)
And if your hearing noise in the front I have found this…

18-NA-163 1…2 (nhtsa.gov)

2 Likes

+1 for WW above! Who would have thought that some sort of mysterious trapped hydrogen gas could come out of a caliper piston, lodge in the brake lines, and adversely affect the rear brake grabbing power? And why would it wait 6 years to do it?

Rear brakes generally don’t apply as much braking force as the front, rust build-up on the rear rotors is not unusual.

There are no recalls that apply to the Regal TourX model.