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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > How long can you drive with 2mm rear brake pad?



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      08-12-2016, 08:06 PM   #1
littlehuman
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How long can you drive with 2mm rear brake pad?

Hi,

It's Friday and I just heard that I need rear brake pad change. I only have 2mm left.

The thing is that it's already late to take my car in to my go to shop. I need to wait until Monday.

Is it okay to drive around 300 miles over this weekend with 2mm? I haven't noticed anything so far.

How long can you drive with 2mm left?
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      08-12-2016, 08:47 PM   #2
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A while. General rule of thumb I've gone with is two new front brake pad sets for every one set rear. Front brakes do about 80% of the braking on a straight, flat road.

It's not super critical, but you'd want it done within the next few thousand miles to be safe. You're perfectly fine for the weekend and then some.
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      08-12-2016, 08:52 PM   #3
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Quote:
Originally Posted by littlehuman View Post
Hi,

It's Friday and I just heard that I need rear brake pad change. I only have 2mm left.

The thing is that it's already late to take my car in to my go to shop. I need to wait until Monday.

Is it okay to drive around 300 miles over this weekend with 2mm? I haven't noticed anything so far.

How long can you drive with 2mm left?
Yes, drove with 2mm for a while.
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      08-12-2016, 09:11 PM   #4
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Welcome to NBA Jam Thank you
fedorE90 Thank you. I will try to minimize miles..and take care of Monday morning.
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      08-12-2016, 09:53 PM   #5
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drive as much you need til Monday.
you are going to replace pad and rotor anyway so it does not matter.
even if you are only going to replace pad you should be ok.
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      08-12-2016, 10:43 PM   #6
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I have read that OEM pads are 14mm when new, so if 12mm got you 30K miles, 2mm should last 5K.
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      08-12-2016, 10:54 PM   #7
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Quote:
Originally Posted by littlehuman View Post
Welcome to NBA Jam Thank you
fedorE90 Thank you. I will try to minimize miles..and take care of Monday morning.
Has more to do how you use the brakes and not the miles. 2mm can go from 2ft to 2000miles.
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      08-13-2016, 01:36 AM   #8
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@sunny // Thank you for confirming
Wilt That's good to hear
@feuer // I don't think I ever abuse my car I hope it handles at least 500 miles
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      08-13-2016, 03:42 AM   #9
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Quote:
Originally Posted by feuer View Post
Has more to do how you use the brakes and not the miles. 2mm can go from 2ft to 2000miles.
I defy you to use 2mm of brake material in 2 ft!!!

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      08-13-2016, 05:53 AM   #10
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Is the CBS telling you the rear brakes are due for service?
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      08-13-2016, 11:44 AM   #11
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Quote:
Originally Posted by Efthreeoh View Post
Is the CBS telling you the rear brakes are due for service?
...because the CBS can indeed give false warning (vs. the actual sensor which triggers a light when it is 'broken' by contact with the rotor).

For example, this post on e90post.com
"I went and bought new pads and rotors and sensor direct from a BMW dealership...Installed them, and soon after, I reset the interval...
After driving it for a few days (less than 500 km), the service indicator appeared again. ...
Just looking through the wheel, the pads themselves appear to have around 8-9 mm of material left."
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      08-13-2016, 12:09 PM   #12
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Quote:
Originally Posted by avocet View Post
I defy you to use 2mm of brake material in 2 ft!!!

I can do it in 0 feet!

DTC on, burnout until nothing is left and rotors are glowing red
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      08-13-2016, 01:56 PM   #13
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Quote:
Originally Posted by Welcome to NBA Jam View Post
A while. General rule of thumb I've gone with is two new front brake pad sets for every one set rear. Front brakes do about 80% of the braking on a straight, flat road.

It's not super critical, but you'd want it done within the next few thousand miles to be safe. You're perfectly fine for the weekend and then some.
Interesting....when I changed all 4 50k, I would say rears were 75% gone, fronts barely 50%. After resetting cbs, rears have 45k, fronts 90k. This is the opposite of your experience.
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      08-13-2016, 02:36 PM   #14
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I've noticed rears wear faster on this car. I think traction control is to blame. Its pretty easy to get into traction issues and since the engine is working against the brakes the wear is accelerated. The rears on my car were replaced before I bought it and will be replaced again before the fronts.
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      08-14-2016, 09:47 AM   #15
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How far can 2mm take you? All the way to the scene of the crash?
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      08-14-2016, 01:10 PM   #16
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Quote:
Originally Posted by Wilt View Post
...because the CBS can indeed give false warning (vs. the actual sensor which triggers a light when it is 'broken' by contact with the rotor).

For example, this post on e90post.com
"I went and bought new pads and rotors and sensor direct from a BMW dealership...Installed them, and soon after, I reset the interval...
After driving it for a few days (less than 500 km), the service indicator appeared again. ...
Just looking through the wheel, the pads themselves appear to have around 8-9 mm of material left."
Relax Smokey, it was just a question. The reason I asked is because a false positive , i.e the pads wear out without triggering the notification can mean the brake system may have other issues not sloved by a simple brake job. So chill bro.
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      08-14-2016, 01:30 PM   #17
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Quote:
Originally Posted by Efthreeoh View Post
Relax Smokey, it was just a question. The reason I asked is because a false positive , i.e the pads wear out without triggering the notification can mean the brake system may have other issues not sloved by a simple brake job. So chill bro.
I was conveying information -- in SUPPORT of what you posted! -- I was not expressing any emotion at all on the topic...I have no emotion about this! So chill bro.
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      08-14-2016, 02:04 PM   #18
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Quote:
Originally Posted by John 070 View Post
Interesting....when I changed all 4 50k, I would say rears were 75% gone, fronts barely 50%. After resetting cbs, rears have 45k, fronts 90k. This is the opposite of your experience.
A big reason for that might be the ediff if you have a 2009+. I've heard of this happening as well. I remember my friend's Golf GTI doing that.

http://www.1addicts.com/forums/showthread.php?t=719012

It dpends upon where you drive and how you drive. I drive on mostly flat straight boring roads, so my ediff isn't doing all too much.
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      08-14-2016, 04:43 PM   #19
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Quote:
Originally Posted by Wilt View Post
I was conveying information -- in SUPPORT of what you posted! -- I was not expressing any emotion at all on the topic...I have no emotion about this! So chill bro.
Sorry, didn't read it that way, apologies. The OP seems a bit nubie.

Peace
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      08-14-2016, 08:05 PM   #20
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Hi Efthreeoh No, I don't have any warnings related to brakes.
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