I have a 2001 BMW 330i and i need to replace my brake pad sensor. How much sensors do i need to buy?

Not sure if it's one for the front and one for the back, or one for every tire.I have a 2001 BMW 330i and i need to replace my brake pad sensor. How much sensors do i need to buy?There is only one for the front and one for rear. So most likely you'll only need to replace one.I have a 2001 BMW 330i and i need to replace my brake pad sensor. How much sensors do i need to buy?u need to replace the brake pad the noise u here is from the brake pad it sure be the front.I have a 2001 BMW 330i and i need to replace my brake pad sensor. How much sensors do i need to buy?The sensor is part of the brake pad.Change the pads that are worn down