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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Brake replacement question



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      03-14-2011, 09:04 PM   #1
P2
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Brake replacement question

At 53K I am just getting the red BRAKE light and red car on lift. Of course, as the manual says, I need new brakes. Now if I go to the condition based maintenance computer, It says 14K for the front and 8K for the rear.

Anyone think that is odd that I would get a "replace your brakes now red light" and I still have 14k and 8K left?
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      03-15-2011, 08:20 AM   #2
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I cannot tell you the issue for sure without seeing your car...

But,

The CBS calculates how long your brakes should last based on how you drive. There is also a wear sensor that is housed in the brake pad (inside front driver, inside rear passenger) that, when worn, will cause the brake indicator to illuminate. You may need new pads and the CBS just doesn't know it.

Brake indicators can be caused by other issues though. You may have low brake fluid, or you may need to change your brake fluid (check the CBS), or you may just have a brake fault.

I hope this helps a bit.

-Tom
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      03-16-2011, 03:08 AM   #3
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Quote:
Originally Posted by P2 View Post
At 53K I am just getting the red BRAKE light and red car on lift. Of course, as the manual says, I need new brakes. Now if I go to the condition based maintenance computer, It says 14K for the front and 8K for the rear.

Anyone think that is odd that I would get a "replace your brakes now red light" and I still have 14k and 8K left?
I'm having the same problem on my 2006 E90 does your brake light stay on at all.
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      03-16-2011, 04:05 PM   #4
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Quote:
Originally Posted by E90 Freak View Post
I'm having the same problem on my 2006 E90 does your brake light stay on at all.
It stayed on for 2 days and went off. 7k left the computer says. I did a visual check and the rears are really thin. I'm not going to fool around. I'm replacing them tomorrow.
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      03-16-2011, 04:08 PM   #5
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Quote:
Originally Posted by 968tomr View Post
But,

The CBS calculates how long your brakes should last based on how you drive. There is also a wear sensor that is housed in the brake pad (inside front driver, inside rear passenger) that, when worn, will cause the brake indicator to illuminate. You may need new pads and the CBS just doesn't know it.

Brake indicators can be caused by other issues though. You may have low brake fluid, or you may need to change your brake fluid (check the CBS), or you may just have a brake fault.

I hope this helps a bit.

-Tom
Ya, that does make sense. I thought the CBS was reading off the wear sensor, obviously not. It's the rears. They are very thin. Even though the light went off I'm getting new ones tomorrow.
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