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      09-18-2020, 08:34 AM   #1
demarcom
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Brake wobble at 10k??

I did not expect this with a BMW... maybe a Nissan, but the brakes are starting to wobble when braking at high speed. Typically this means they are warping and need to be cut. Not expected at 10K miles. Anyone else have issues with brakes?
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      09-18-2020, 10:59 AM   #2
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Quote:
Originally Posted by demarcom View Post
I did not expect this with a BMW... maybe a Nissan, but the brakes are starting to wobble when braking at high speed. Typically this means they are warping and need to be cut. Not expected at 10K miles. Anyone else have issues with brakes?
It's typically either warped rotors or deposits on the rotors. How is your car stored/driven? I've dealt with this issue caused by deposits on 4 different vehicles (2 BMWs, 1 Mini, and 1 MB) when they were parked outside on a consistent basis and not driven consistently/daily. If it's just deposits, I've had success getting rid of them by repeated hard braking from 60mph to 5mph without stopping.

If it's warped rotors, it should be covered by warranty unless there are clear signs of abuse or damage.
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      09-19-2020, 09:06 PM   #3
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Yes, I have had the same issue with the brakes at around 6k miles, brought it to dealer attention, they replaced the brake pads and resurfaced the rotors, its been fine since then...


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Originally Posted by demarcom View Post
I did not expect this with a BMW... maybe a Nissan, but the brakes are starting to wobble when braking at high speed. Typically this means they are warping and need to be cut. Not expected at 10K miles. Anyone else have issues with brakes?
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      09-20-2020, 01:26 AM   #4
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Rotors can have this issue on any car when they are cooled too fast. Had it on my Land Rover. They were all replaced under warranty. Never wash your brake rotors when hot... 😉
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      09-20-2020, 01:29 AM   #5
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Originally Posted by AlexG05be View Post
Rotors can have this issue on any car when they are cooled too fast. Had it on my Land Rover. They were all replaced under warranty. Never wash your car rotors when hot... 😉
All you need is brake hard and then drive through a puddle. Happened to my X1 after braking to avoid some reindeers..
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      09-20-2020, 06:12 AM   #6
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Yes, mine are a bit warped. First car of mine that has ever happened to. I have been wondering if the dealer unevenly torqued the wheels when rotating.
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      09-21-2020, 07:40 AM   #7
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Thanks all. i will have them checked.. it's due for it's 10k service.
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      09-21-2020, 07:59 AM   #8
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Quote:
Originally Posted by demarcom View Post
I did not expect this with a BMW... maybe a Nissan, but the brakes are starting to wobble when braking at high speed. Typically this means they are warping and need to be cut. Not expected at 10K miles. Anyone else have issues with brakes?
The main reason discs warp is due to the driver coming from a firm stop and then waiting at traffic lights etc and keeping your brakes applied, as the discs cools the section that is clamped cools at a different rate so warps the disc. So if have just come off a freeway make sure you apply the handbrake if stationery for any length of time.
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      09-21-2020, 12:18 PM   #9
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I'm wondering about the Active Cruise Control contributing to warped rotors. I live in an area with some decent hills, some are actually called mountains, LOL. They vary from about 700 to up to 1500 ft in elevation. When using the ACC the vehicle is slowed down when going downhill. Are the brakes being used or is it the tranny as I don't notice an downshifting going on? Could this possibly lead to warped rotors?
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      09-21-2020, 01:18 PM   #10
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Quote:
Originally Posted by Ian335xd View Post
The main reason discs warp is due to the driver coming from a firm stop and then waiting at traffic lights etc and keeping your brakes applied, as the discs cools the section that is clamped cools at a different rate so warps the disc. So if have just come off a freeway make sure you apply the handbrake if stationery for any length of time.
This is interesting for a few reasons:

1.) I've always done this and people always ask me about it, so I'm glad to hear I'm not alone!

2.) The X5 will be my first car without a handbrake and manual or m-dct so it seems weird to push a button ... no?

3.) Is this where people use auto hold? and does auto hold use the brakes or e-brake? anybody know?
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      09-22-2020, 02:11 AM   #11
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Quote:
Originally Posted by GrussGott View Post
This is interesting for a few reasons:

1.) I've always done this and people always ask me about it, so I'm glad to hear I'm not alone!

2.) The X5 will be my first car without a handbrake and manual or m-dct so it seems weird to push a button ... no?

3.) Is this where people use auto hold? and does auto hold use the brakes or e-brake? anybody know?
I always use #3. Never set foot on brake If I remember for the last 7 years or so during red light or extended stop in the traffic. Don't know if it's using brakes or e-brakes. But it's the feature I like it most.

On the other hand my wife always use foot on the brake said, she don't trust the AH feature..LOL
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