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BMW E92 335i 2007 Red Brake Light (with exclamation mark) and Service Symbol

3 reading
2.9K views 3 replies 2 participants last post by  dlocke8  
#1 ·
Hello all,

Although I am not new to this forum, I am a new owner of a E92 335i.

I started up my car this afternoon, and the red handbrake light stayed on with a service sign, stating that i need to replace my brake pads.

I have connected the car up to INPA and read the codes:

5DE1
5DE0

Which, with a bit of research suggests that both the front and back sensors have failed at the same time. Is this actually possible? Secondly, when my brake pad wear sensors failed on my old E46 I had a different light, it was yellow with the brake pad symbol, not red.

I would be interested to get everyone's view on this, before I have to take it to the stealers.
 
#2 ·
Strange that both should show a code at the same time. How low are your pads?

I personally don't rely on the sensors. I changes my rear pads last week after unusual noises. The OBD said 7000 miles left. When I took them out there was so little braking material that it was delaminating from the metal backing, making the noises. No way was there 7000 miles on them.

When you change the sensor, the ecu registers a change in resistance. You cannot reset the OBD with an old sensor fitted.
 
#3 ·
Thanks for your response.

Yes, it is strange that it is reading both front and back. Interestingly when I look through the service miles on each component, both the front and back pads are reading _ _ _. I have never relied on the sensors either, in fact I normally just replace them, and don't fit them to the pads. I then just do a visual check to ensure that the pads are okay.

I'm going to buy some new sensors today and fit both of them. I will then try and reset the service light. Hopefully that will work.

If it doesn't then I actually don't know. The only thing else that I can think of is a central failure somewhere, which reads both front and back sensors, which i think is the DSC Module?

Did you have the handbrake light on when your sensor was failing?