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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > 12k, NEW BRAKES ALL AROUND!



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      10-25-2007, 10:49 AM   #23
epiphone3
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Originally Posted by dxb335d View Post
the rears needed doing on mine first? aint that a bit dodgy?

why would the rears need doing before the fronts?
hahaha... this is fairly normal on very powerful BMWs.

You have a little thing called 427 ft-lbs of torque. If you step on the throttle just a little too hard, you probably trip the traction-control which means that the brakes get applied to slow down the slipping wheels. THis wears brakes fast... my dad's old 330i wore the rear brakes slightly quicker than the fronts from having a couple heavy winters and lots of traction-control action.
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      10-25-2007, 11:32 AM   #24
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Originally Posted by epiphone3 View Post

Having warped rotors and over-heated pads comes from poor driving habits and not from poor design in this case, I'm afraid.
Some manufactures are known to have bad rotors. My Acura TSX had warped rotors after 5000km and again at 15000 km. I changed it to Brembo blank and it was still good when I traded it in at 69,000km.
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      10-25-2007, 11:39 AM   #25
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Quote:
Originally Posted by dxb335d View Post
the rears needed doing on mine first? aint that a bit dodgy?

why would the rears need doing before the fronts?
same here on an E90 325i...just had the rears replaced around 23k miles. OBC says fronts still good for 9k miles which is a huge difference.

As mentioned, it might be the traction control working hard or the brake force proportioning.
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      10-25-2007, 01:06 PM   #26
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Originally Posted by Ryan 330i View Post
so i brought my car into service for its 1 year or 15k. Even though it has 12k it was time according to the count down in the trip computer. And no, no one called me from BMW like the Nav system said it would. Surprise, surprise.

Anyways, i brought it in for that, the seat belt thing was broken, and a few other real small things. In passing i mentioned to my advisor the back brakes seemed a little squeeky but were functioning totally normal.

After a day in the shop she called me to tell me that all 4 roters were warped, and the pads all developed a blue coating which indicated the brakes had over heated. She stated this was out of BMW's warranty guidelines for replacement (excess ware and tear) and BMW wouldnt cover it till a region service manager made the call to do it. i had a fit, and of course they did it.

So long story short, why are these brakes on my 335 designed so poorly. Sure i live in San Francisco and there are a lot of hills. Sure i brake a little harder than the average joe, but its a 335 lets not forget that. Its a BMW! It should be designed to drive 130MPH daily. Thats what you pay the big bucks for.

Not that i had to pay or anything, but it was a little dissapointing that the brakes and rotors only lasted 12,000 miles! Thats kind of a joke...

Dont you think? Anyway with 4 new rotors, and all new brake pads front and back, she feels like day one again.

Thoughts??
Funny, the red brake service light came on at 12k miles on my car too. Dealer changed them without drama.

I'm finding out that the pads are really soft (soft stops better). Nevermind longevity and lots of brake dust.

And if you have a (cough cough) piggyback, then you are going to activate traction control (brakes) more often and have to use more brake energy to stop. Add that to So Cal stop and go traffic....
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      10-25-2007, 01:23 PM   #27
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      10-25-2007, 01:26 PM   #28
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Originally Posted by Socom View Post
Either you didn't seat the brakes, OR you autocross, OR u'r just too hard on the brakes. Sure the cars are made to go 155 mph, but not 0-155-0 within .5 miles.
I'm betting option #1.

Many people have had their 335's out on road courses and haven't had "warped rotors." I use parenthesis because this is the most common mis-diagnosis of failure to seat brakes and then using them rigorously.
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      10-25-2007, 07:50 PM   #29
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Quote:
Originally Posted by Ryan 330i View Post
so i brought my car into service for its 1 year or 15k. Even though it has 12k it was time according to the count down in the trip computer. And no, no one called me from BMW like the Nav system said it would. Surprise, surprise.

Anyways, i brought it in for that, the seat belt thing was broken, and a few other real small things. In passing i mentioned to my advisor the back brakes seemed a little squeeky but were functioning totally normal.

After a day in the shop she called me to tell me that all 4 roters were warped, and the pads all developed a blue coating which indicated the brakes had over heated. She stated this was out of BMW's warranty guidelines for replacement (excess ware and tear) and BMW wouldnt cover it till a region service manager made the call to do it. i had a fit, and of course they did it.

So long story short, why are these brakes on my 335 designed so poorly. Sure i live in San Francisco and there are a lot of hills. Sure i brake a little harder than the average joe, but its a 335 lets not forget that. Its a BMW! It should be designed to drive 130MPH daily. Thats what you pay the big bucks for.

Not that i had to pay or anything, but it was a little dissapointing that the brakes and rotors only lasted 12,000 miles! Thats kind of a joke...

Dont you think? Anyway with 4 new rotors, and all new brake pads front and back, she feels like day one again.

Thoughts??
I dont know why they would even question exceesive wear on your brakes. Part of the incentive buying a BMW is their 4yr/50k waranty on it. When i bought the extended maintence package "brakes" was their main selling point.
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