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View Full Version : HOWTO on replacing front brake sensor.


JPerfect
11-29-2005, 09:24 AM
It's really easy, you can do it in a matter of 20 minutes as long as you don't run into any problems.

First, of course, take off your Front Driver's Side Wheel. Look on the right side of the caliper, there's a little wire going into it. Remove the wire.

http://www.318ti.org/gallery/data/531/sensorfitting.jpg

As you can see by looking at the wire, it's really worn... this is what the worn one looks like:

http://www.318ti.org/gallery/data/531/medium/oldsensor.jpg

Here's what the new one looks like:

http://www.318ti.org/gallery/data/531/medium/newsensor.jpg

After disconnecting the old sensor from the caliper and brackets, you have to pull open the little box it's connected to, and disconnect it. Here's what that looks like:

http://www.318ti.org/gallery/data/531/connectorbox.jpg

Put the new sensor wire on the same as the old one was connected in, and viola! You're finished!

All in all, the only tool you really need is your lug wrench to wrestle off your wheels. I used a flathead screwdriver to make sure the new sensor was pushed firmly in the slot, it does go in much tighter than the worn one comes out.

I got the sensor from BavAuto for like 16 bucks. On a scale of 1-10, I'd call this a 1. It satisfied me greatly to finally have that brake sensor light out of sight and out of mind.

b0m
11-29-2005, 10:21 AM
shouldn't they be replace WITH the brake pads?

1996 328ti
11-29-2005, 02:33 PM
shouldn't they be replace WITH the brake pads?Only if the wire is frayed or it trigged the brake lining light. No need to replace them everytime.

Nice little writeup. I can't wait until I get the articles system in place.
That's cool how you figured to link the photos. :)

JPerfect
12-08-2005, 09:06 AM
As a Birthday present, my parents got me new brake pads and stuff, and the mechanic they brought the car to "didn't know if the sensor would need to be replaced, and if it did... it'd be an extra fee."

I told my parents to hold off, I'll do the extra fee of 15 bucks myself later. He was going to charge 50.

Ralliart10
06-18-2011, 08:01 AM
I'm glad I found this I hate seeing the brake light being on ahah