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Old 07-13-2018, 12:29 AM   #1
xup
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Clicking noise after releasing brake pedal?

A few weeks back my 17 R started making this clicking noise after releasing the brake pedal. Almost sounds like a relay switching. It's intermittent, and can happen at any speed. As soon as I get back on the brake, the clicking stops. It doesn't seem to affect the operation of brake - everything feels normal, other than the noise.

Got it captured on video. Any idea what could be going on here? Scanned with vcds and there is no error code.

https://streamable.com/pl4xk

Last edited by xup; 07-13-2018 at 04:11 AM.
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Old 07-13-2018, 02:59 AM   #2
Wrath And Tears
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Wow that does totally sound like a relay. I would take it to the dealer for complete diag. Worst case scenario is a loose brake caliper, but that would get louder with speed/rotation.
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Old 07-13-2018, 03:44 AM   #3
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Ya crazy, sounds like you have your hazards on. Post back what it was when u get it figured out, does sound like a relay, weird!
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Old 07-13-2018, 01:29 PM   #4
G7Rules
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There is a relay sound that occurs when the adaptive cruise activates the brakes. I can't watch the video right now but my guess is it has to do with that system. Try turning ACC and forward collision warning off to see if it still does it.
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Old 07-13-2018, 04:11 PM   #5
xup
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Quote:
Originally Posted by G7Rules View Post
There is a relay sound that occurs when the adaptive cruise activates the brakes. I can't watch the video right now but my guess is it has to do with that system. Try turning ACC and forward collision warning off to see if it still does it.
ACC is off.

This can even happen for a few seconds after I shut off the car.
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Old 07-14-2018, 01:38 PM   #6
G7Rules
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Originally Posted by xup View Post
ACC is off.



This can even happen for a few seconds after I shut off the car.


Do you have a VCDS to scan for codes? If not, mention to your dealer the relay sound and that it could be related to the automated braking. They will take you seriously.

Also, I would recommend getting it checked out/fixed as soon as you can. If the ACC/AEB is malfunctioning, it could put you at serious risk on the highway.
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Old 07-14-2018, 03:12 PM   #7
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Mine does this as well. Seems to come and go. Haven't brought it to the dealer yet for it.
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Old 07-14-2018, 07:12 PM   #8
xup
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Quote:
Originally Posted by G7Rules View Post
Do you have a VCDS to scan for codes? If not, mention to your dealer the relay sound and that it could be related to the automated braking. They will take you seriously.

Also, I would recommend getting it checked out/fixed as soon as you can. If the ACC/AEB is malfunctioning, it could put you at serious risk on the highway.
No error code. ACC works fine but obviously I can't test the emergency braking

Yeah, I'm taking it to the dealer next week.
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