Brake pad thickness/specs?
#11
AudiWorld Senior Member
The sensors are simply a wire embedded in the pad about 3 mm from the backing plate. When the pad is worn to 3 mm the wire wears through also and opens the circuit setting off the warning. It cannot be reset until you change the pads.
#12
AudiWorld Senior Member
Thanks for the explanation! Do you know if the sensors need be changed along with the pads or can be reused? Although I have been changing brake pads and rotors for years, this is my first car with a wear sensor. All my previous cars had only the traditional spring indicator which just makes scraping noise when pad is too thin.
#13
AudiWorld Junior Member
Thread Starter
Thanks for the explanation, SchwarzS6.
#14
AudiWorld Senior Member
Thanks for the explanation! Do you know if the sensors need be changed along with the pads or can be reused? Although I have been changing brake pads and rotors for years, this is my first car with a wear sensor. All my previous cars had only the traditional spring indicator which just makes scraping noise when pad is too thin.
#15
AudiWorld Member
Thanks for the explanation! Do you know if the sensors need be changed along with the pads or can be reused? Although I have been changing brake pads and rotors for years, this is my first car with a wear sensor. All my previous cars had only the traditional spring indicator which just makes scraping noise when pad is too thin.
#16
AudiWorld Senior Member
This is the front brake wear sensor for B9 A4 on ECS Tuning. Trying to understand how it is attached to the pads. No sensor/wires come with the pad set though.
Last edited by minmet; 04-18-2019 at 07:14 AM.
#19
AudiWorld Senior Member
I am pretty sure these are built into the OEM pads. From what I can see the OEM catalog does not list a separate sensor wire. Are these for aftermarket pads?
#20
AudiWorld Senior Member
It appears there are two versions of pad set for B9 A4. There is also some confusion as to if the sensor is included or not with different version of the pad set.