Saturday, 4 February 2012

BMW E90 DIY Front Brake Lining / Pad Change

2007 BMW E90 N46B20

Mileage: 67k km

Early January, OBC said my front brake linings can last another 2.5k km.. 2 weeks later or 1k km later, I’m at –500km !! Surprised smile Hence, the following DIY.. Smile

Been changing brake pad since I first own cars.. and still doing it to my other higher mileage Toyota mini MPV.. refer to my archive.

Here goes:

1) Use a brick to block the rear wheel to secure the car preventing it from slipping of the jack.

2) Turn the steering to the right for a left wheel job so the brake caliper is exposed.

3) Loosen the wheel lugs before jacking the car.

4) Jack the car.

5) Unscrew the lugs and remove the wheel. The wheel tend to seize at the rusty wheel hub and require some effort to knock the wheel out. I used a rubber mallet. So worry the jack slips while I hammered it. Check out the rusty wheel hub.

IMG080

6) Unplug the plastic protective plugs, item 7 below so we can reach and unscrew both the upper and lower guiding bolts using size 7mm Allen key wrench, item 6.

 

IMG096

7) Use a sharp plier to slide the guiding bolt out so we can lift up the caliper housing.

 IMG097

IMG082

8) Carefully remove the brake wear sensor. It can be recycle depending on the condition of the sensor. I’m not so lucky because I broke mine. I pulled/forced it out before opening the caliper housing, hence snapped into 2 pieces..Smile with tongue out

9) Slot in a metal bar or wrench handle into “X” below and use it as a pivot to push the caliper piston back into it’s camber, to make room for the new lining. Make sure you apply force to the center of the piston surface so even pressure is applied. Uneven pressure make damage the piston seal in the long run.

Make sure you monitor the brake fluid reservoir so it does spill/overflow. Remove any excess brake fluid carefully because the corrosive fluid can damage our car’s paint. If contacted with the car’s body, immediately rinse off with water, wash with soap and wax it.

Also please note that the 2 guiding bolts need not be taken out entirely.

image

10) Clean the slots where the lining seated, it’s filled with brake dust. The clean seat allow the lining to slide in and out during operation, prevent sticky pads. The lining over the caliper piston is plug into the piston cavity, so need to apply some force to unplug it.

IMG095

11) I prefer to install the brake sensor before returning the caliper housing into place because I can see how the sensor is seated without the brake disc rotor blocking my view. You may do it later.

IMG099

More photos:

Pad/lining that I use. TRW brand.

IMG094

Close-up on the sensor

IMG098

Old vs new

IMG088

The bill, yup! I bought both front and back, same price. For E90, only the front left and rear right has sensor.

IMG085

Notice how I use the wheel to support the rotor, just in case the jack slipped.. Smile with tongue outAlso notice the L-shape bar on the lower right corner? I used that to push the caliper piston returning it back into the piston camber.

IMG081

By the way, have fun figuring out how to reset the OBC counter.. haha! Open-mouthed smile

Thank you for reading! Smile

9 comments:

  1. Thank heavens for this wonderful guide! This would be really helpful for those people who love to repair their own cars. But anyway, do you work for an auto shop or something? You really do sound and look like a professional while you're explaining the procedure. :)

    Carry Demaggio

    ReplyDelete
  2. A very informative post. I'm sure a lot of drivers will learn a lot from this blog if they see this cause 40 percent of car crashes are because of brake issues. It's very important to check first your vehicle before you're going into a long road trip. Brakes-4-less would be happy to help you in your brakes in case it's not working properly. It's very affordable and their mechanics their are extremely knowledgeable and have decades of experience in servicing brakes. brake repair mt pleasant sc

    ReplyDelete
  3. When you are looking change your car brake pads, you should look for auto repair expert can help you lot in changing your car brake pads and points you made is good.
    automotive brake pads manufacturers
    http://asimcoglobal.com/about.html

    ReplyDelete
  4. Just wondering where did you find that 7mm Allen? Im trying to change my brake pads and realised I don't have the 7mm size Allen key and couldn't find in ace hardware either.

    ReplyDelete
  5. http://www.lelong.com.my/mk-tol-3375-07-0-7mm-hex-key-wrench-mark-erhuat-I1432777-2007-01-Sale-I.htm

    http://www.lelong.com.my/mk-tol-4026m-07-7mm-hex-bit-socket-mark-erhuat-I1433876-2007-01-Sale-I.htm

    ReplyDelete
  6. Used this post to change my pads. Very spot on writing and easy to follow!

    ReplyDelete
  7. If you are looking forward to buying brake pads online. Check at Sand Dance Tyres. I have also recently bought brake pads from them. Both their service and products are great.

    ReplyDelete