Brake Sensors

[majesty]

I have a 1992 SC400 and I was going to have my rear brakes replaced, but I've been told that I have to replace my brake senors too. Is is necessary to have your brake sensors replaced everytime you have the pads replaced?

[1990LS400]

I didn't think brake wear sensors were used as early as 1992 on Lexus cars but, no, it is not necessary to replace brake wear sensors unless they are damaged by a pad wearing down to the last 1 mm or so which triggers a warning on the dash on cars that have brake wear sensors. I'm not an expert on the SC but I know my 2000 LS400 has only one brake wear sensor for the rear brake pads and only one for the front ones.