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Parking brake malfunction

Tiny
CIAOMUFF
  • MEMBER
  • 2002 BMW 745
V8 two wheel drive automatic 60,000 miles.

I have the yellow warning sign on the dashboard that the parking brake is malfunctioning.

No other problems exist with the car, electrical, warning icons, etc.

Is this a matter of tightening the parking brake cable, or possibly rear brake pads need replacement?

Thank you.


http://www.2carpros.com/forum/automotive_pictures/415942_BMW_int_3_1.jpg

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Wednesday, September 30th, 2009 AT 6:12 PM

6 Replies

Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
The parking brake shoes are adjusted through one of the wheel bolt holes-E36 models shown, E30 similar.
The parking brake may be tight.or there is a binding on the parking brake system.


https://www.2carpros.com/forum/automotive_pictures/46384_parking_brakesgif1_1.jpg



The star wheel adjuster is moved by pivoting the adjustment tool-E36 models shown, E30 similar


https://www.2carpros.com/forum/automotive_pictures/46384_parking_brakes_1.jpg

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Wednesday, September 30th, 2009 AT 6:25 PM
Tiny
CIAOMUFF
  • MEMBER
  • 2 POSTS
But I am not sure you understood my question.

The "malfunctioning brake" light is illuminated, but there is no binding. Simply put, the parking brake will not engage when I press the electronic parking brake button.
Is this due to worn parking brake pads? Or shall I try to adjust them? Could this be an electrical problem? A fuse burned out?
I can check all, but thought maybe to ask first as this may be a common problem/function of this model.

Thanks in advance.


https://www.2carpros.com/forum/automotive_pictures/415942_parkbrake_1.jpg

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Wednesday, September 30th, 2009 AT 8:57 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
The parking brake is electrically actuated and may need service, it will need to be checked by a BMW knowledgeable technician who can scan the car and deliver the diagnosis. It is not possible for me to pinpoint the issue from here. Do you have a repair facility that has been servicing the car?
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Wednesday, September 30th, 2009 AT 9:16 PM
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
That is correct Dr. Hagerty, a continually illuminated brake warning light may be cause by a grounded wire to the parking brake switch, or a continually closed parking brake switch, or low fluid level one section of the master cylinder reservoir.
Follow what Dr. Hagerty, take it to a BMW facility. You have a nice car there.
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Thursday, October 1st, 2009 AT 4:45 PM
Tiny
MSNIKA
  • MEMBER
  • 3 POSTS
I wanted to know how it was resolved.

2003 745Li


https://www.2carpros.com/forum/automotive_pictures/537617_bmw_light_1.jpg

The light is yellowish instead of red as it is when engaged.
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Thursday, June 10th, 2010 AT 10:35 PM
Tiny
DOCHAGERTY
  • MECHANIC
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Me too!
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Friday, June 11th, 2010 AT 8:10 AM

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