United Bimmer Do-It-Yourself Disclaimer:
The following tutorial is meant as a guide and is not
guaranteed to be complete or 100% accurate. By following this DIY, you
understand any work done on your car is at your own risk and we hold no
responsibility if you break something. If you feel uneasy with this
risk, we recommend you take your car to a professional mechanic to have the
work done. Otherwise, enjoy yourself and good luck!
This was done on a 1991 318is. Please Note that you should change the
pads in pairs either the front or back or all around at the same time. The
pictures I have taken are of the front not the rears, which differ slightly.
This procedure also assumes that you are going to reuse your brake pad
sensors which just clip into the pads and are very easy to clip in and
For the Front
- Jack up the car and remove the wheel where you want
to change the pads.
Use a jack stand so you do not have to worry about the car crashing down on
you while you’re under it. Remove the 2 bolts that hold the Caliper onto the
wheel you will need a 13mm Socket or conventional wrench for the bolts and
either a decent pair of Pliers/Channel locks (I used these) or a 15mm
wrench. Please see photo for where you need to hold and where you need to
After you have removed both screws you should be able to pull the outer part
of the caliper off and have access to the pads. Be careful after the outer
part is free, because its attached to a hose and you do not want to let it
fall and cause any damage. After this you need to compress the brake piston,
its on the far side of the caliper, and this can be done with a C-Clamp (I
Recommend this way as it is easier) applying pressure to compress it all the
way down. Another way to do it is before you take the caliper off stick a
flat head screwdriver between the pad and rotor and apply pressure to
compress it (be careful not to damage the rotor).
After the piston for the brakes is compressed you can seat the new pads. I
recommend putting them on either side of the caliper and then putting the
outer cover back on. When you put the cover back on make sure the springs
are in the right position, they will push back on it some so you need to use
a little pressure. Realign the screw holes and put the screws back in the
way you took them out. Replace the wheel and torque to the suggested
Continue to the next wheel.
After you are done start the car, and then press the brake pedal until its
firm again, this will move the brake piston back to where it needs to be. I
then tested to make sure the car stopped at low speed, and then drove it for
a few minutes to make sure all was well. Please note it may take a couple of
hundred miles to bed the pads in and they may make more noise in this time
and take a little longer to stop.
Please note the Left front and Right Rear locations have brake pad sensors,
which can be reused if they are in good condition. Otherwise they are very
easy to replace.
Differences Between the Front and Back procedure
: The Rear is set up
differently from the front, you need to remove 2 black covers (on the inside
of the caliper) under those covers are the caliper guide pin which requires
a 7mm Hex head (Allen wrench, or a socket attachment) unscrew them and then
move to the front of the rotor and remove the retaining Clip. This can be
done with a flat head screwdriver. After that you should be able to remove
the housing, you need to compress the brake piston just like in the front
and then replace your pads, reverse the process to put it all back together.
There you go guys, Sorry some of the pics are kind of blurry, and Sorry
there are not any pics of the rears I did them 1st and forgot about taking