Ok, so it still does the same 1,5 years later with no other problems? We're just a little unlucky I guess
Mine becomes hard in about 2 days of not moving.
I have the same problem since day 3 with my 2022 Stinger Elite AWD (Canada). I put my car in the garage and 3 days after, the pedal was hard. The dealership looked for a leak and changed a pump, but the problem is always there. It will do that if I don't use the car for 2 days. In the winter, it takes between 12 and 24 hours to do it.
I previously had a 2018 AWD GT Limited and it started doing that after 4 years. There was a recall for this, but I got my 2022 before getting it fixed. I didn't have any news if it fixed the problem on the 2018 since.
Did you ever find a solution to this? Mine started doing it as well. The pedal is rock solid before starting the car. Everything else seems fine. If I turn off the engine and press the pedal it stiffens after the third push, as expected.
Still, weird feeling when I turn it on the first time. Definitely didn't do this until a few weeks ago. Brake fluid was changed about 12k km ago.
Could it be because the pads are close to replacement? (even though I don't see any connection)
it's the brake booster. i've had the vacuum pump and check valve replaced by a dealer that hadn't come across this before, neither fixed it. went to another dealer that had, immediately replaced booster, problem gone.
The first dealer didn't even bother to test after they replaced. so frustrating. I doubt the second dealer tested after repair either, but at least the problem is gone.
