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      09-15-2014, 08:36 PM   #1
drexplode
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new front rotors and pads

Front rotors and pads were replaced under warranty. Just curious if there is a procedure for breaking them in? Also, I'm noticing grooves on the rotors from the pads - normal? Sorry guys, not so much a chassis expert.

I've done a few hard stops and then release. So far about 200-300miles used thus far.

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      09-15-2014, 08:43 PM   #2
s85e90
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Those aren't grooves persay but more from the machining process, marks left from the tooling.

Go out to a empty road where you can accelerate up to @ 50 + mph and do several hard stops to @ 20 and you should be good to go.
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      09-15-2014, 08:44 PM   #3
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http://www.zeckhausen.com/bedding_in_brakes.htm
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      09-15-2014, 08:49 PM   #4
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Yeah machining marks on new rotors. Grooves will develop in a circular line around the rotor because ... that's how they spin!
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      09-15-2014, 08:51 PM   #5
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1. Rotors look fine.

2. From the owner's manual:

Brake system

Brakes require an initial break-in period of
approx. 300 miles/500 km to achieve optimized
contact and wear patterns between brake pads
and rotors. Drive with caution during this breakin
period.
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      09-15-2014, 09:01 PM   #6
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Did you had Brake warning light? Is that why they changed the rotors / pads?
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      09-15-2014, 09:03 PM   #7
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Quote:
Originally Posted by quicktwinturbo View Post
Did you had Brake warning light? Is that why they changed the rotors / pads?
Dealer almost always does both, at least mine did. On my x5d also.
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      09-15-2014, 09:05 PM   #8
s85e90
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Quote:
Originally Posted by 1MOREMOD View Post
Dealer almost always does both, at least mine did. On my x5d also.
that would presumably be under the maintenance plan and not warranty though correct?
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      09-15-2014, 09:12 PM   #9
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Quote:
Originally Posted by s85e90 View Post
that would presumably be under the maintenance plan and not warranty though correct?
Right you are. Just snuck both front and rear rotors and pads in on my 2011 x5d before maintenance ends. Goes thru them little faster using it as tow rig.
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      09-16-2014, 07:50 AM   #10
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Looks fine. Unless you're getting excessive sqealing or vibrations I wouln't bother bedding them. Just drive it.
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      09-16-2014, 07:55 AM   #11
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Quote:
Originally Posted by 1MOREMOD View Post
Dealer almost always does both, at least mine did. On my x5d also.
Right. Did they decide to replace your brake because they checked the thickness of your old pads / rotors? Or did you get a warning light?

I think my pads are pretty much done but my service advisor told me to wait till I get a warning light...
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      09-16-2014, 09:14 AM   #12
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Quote:
Originally Posted by quicktwinturbo View Post
Right. Did they decide to replace your brake because they checked the thickness of your old pads / rotors? Or did you get a warning light?

I think my pads are pretty much done but my service advisor told me to wait till I get a warning light...
On my e90 it was because the pads were gone, several times due to some track use. In my x5d it is because the service indicator is close even though I can see the rear pads and tell they have a ton of meat left.
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      09-16-2014, 11:41 AM   #13
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Thanks guys for the feedback.
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