Brake drag/squeek on cold start?
#1
Brake drag/squeek on cold start?
We've noticed a squeek in the morning when driving out of a parking garage with our low mileage 2017 Q3 w/ 13k miles. At first I thought someone else's brakes were squeeky, but I rolled down the windows and heard it loudly today when nobody else was around to make noise. This happened without touching the brake pedal and got louder with brake action. I couldn't tell if it was more from the front or rear. A few miles later after the car was warm and there had been a few brake applications in traffic, I tried pulling through another parking garage with my windows down, and I no longer hear any squeek at low speeds or while braking. I expect it will return on the next cold start.
I understand that brake discs can get corroded over night but I can't understand why it squeeks when I do not touch the brake pedal. Does anybody know whether the ABS or quattro system lightly drags the brakes after first starting the car for the day?
I understand that brake discs can get corroded over night but I can't understand why it squeeks when I do not touch the brake pedal. Does anybody know whether the ABS or quattro system lightly drags the brakes after first starting the car for the day?
#2
This problem kept happening for a few weeks. I talked to my dealer and they thought it was corrosion from the described symptoms. I also found more similar reports for other higher volume makes/models that closely matched my experience. In the last week or so, we finally had a switch from humid sea air to dry desert air for several nights, and the problem did not reappear the morning after those nights. So, I think that seems to reinforce the idea that it is corrosion forming as the car rests.
I guess the resting gap between the pads and rotors must be getting much smaller than it was on older cars, in order to have corrosion cause squeeking without brake application...
I guess the resting gap between the pads and rotors must be getting much smaller than it was on older cars, in order to have corrosion cause squeeking without brake application...
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