On all e90 and on the brake wear sensor is not "full circuit/broken circuit" anymore. Pad mileage won't reset, if you unplug and replug the old sensor. The only solution is new sensors or crossing the brake sensor wires? If this is confirmed, it should be posted as a sticky and the word spread widely so we can counteract this unethical sales practice of BMW!Ĭan anyone confirm that the pad mileage doesn't reset if you plug and re-plug the same sensor (which isn't worn down yet). I hope someone in a similar situation can try simply disconnecting all of their old / intact pad wear sensors and reconnecting them to see if this in fact will allow the brake service light to be reset. If my assessment is true, it means BMW is using a sneaky trick to force us to buy overpriced wear sensors even if the old ones are good. Strangely, none of the service people (including manager) at my dealership were aware of this. If it thinks they are not replaced, it continues to issue a warning. This leads me to conclude that the car's computer system looks for the brake wear sensors to be disconnected and then re-connected to determine if they have been replaced. I then checked to see if the old brake wear sensors had self-destructed, and all indicated a short on a low resistance ohmmeter (i.e. Only after changing 3 apparently good pad wear sensors to new ones did the warning reset sucessfully using the odo button/BC button. I also tried using my AutoEnginuity ODB tool and it refused to reset.
I tried the reset procedure using the odo button and the BC button on the turn signal stalk, but it refused to reset. I double checked all 3 pad sensors, and they were intact.
It said all pads had to be replaced (based on mileage, not actual wear of the pad sensors which were tied off due to frequent pad swaps for the track). My 2008 M3 Coupe brake pad warning light came on as a result of the service indicator counting down to zero. I thought I would post my experience with this issue since I see a lot of questions about it.
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