Question about 2006 Audi A8

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Rear electronic patking brake/ caliper looks SCARY.

Is it a ''normal'' brake pad replacement job ?
Will the piston retract as normal ?
Or will my trying to replace the brake pads cause some problem ?

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  • jessepayan Mar 15, 2009

    You Are The Master!



    --thanks for the link also.

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  • 34 Answers

Your A8 and new shape A6s with electric parking brakes require an electric input to the vehicle to tell it to wind back the pistons/pads. Main dealers have this on their diagnostic equipment. You can also purchase after market tools that just do this operation, heres an example
http://www.alpha-bid.com/product244.html
I have only ever used a main dealer machine so im not sure how good an after market one will be. Im not aware of anyway of doing the job without an electrical input to wind back the pads, the motors are very powerful so I wouldnt reccommend trying it manually. Hope this helps.

Posted on Mar 15, 2009

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How to put rear brakes on


Remove the caliper mounting bolts and remove the caliper. Replace brake pads as necessary. Special tool is required to retract caliper piston to fit over new pads. (see picture below)
Retract piston in caliper using special tool to rotate clockwise and make sure the notch in the piston is aligned properly so the tab on the inner pad will fit in properly.
Reinstall caliper assembly and caliper mounting bolts.


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Removal of brake calipers and pads on 1992 xj6 jaguar


Hi Jasa

Unless you are mechanically competent, I would not advise you carry out this procedure yourself, but leave it to the professionals.

If you are mechanically minded, and competent, the pads are relatively easy to replace, as follows.

Jack up the vehicle and put on stands, if you don´t have access to a hoist?

Remove wheels, and open the hood, put some kitchen roll around the brake fluid reservoir, to catch any excess brake fluid, when you push back the brake caliper pistons, if it´s been overfilled.
On the front brake caliper's, you are best to put in a little lever between pads and disc, and ease back the piston to fully retracted, unless you have a small G clamp which will do the same job when caliper is adrift.

Remove the 2 x 13mm caliper securing bolts and swing off the caliper, and support with a piece of wire, don´t just let it dangle on the brake hose.
Remove the brake pads, and sensor wire, check the caliper piston dust cover for splits, and clean caliper, housing, etc, and disc, with brake cleaner.

Fit the new brake pads to the caliper, and refit with 2 new securing bolts with blue lock tite, (normally supplied with the B/Pads.)

The rear caliper´s are pretty much the same as the front, although you can just undo the top bolt and swing the caliper back, but I usually remove both, for ease of cleaning, and inspection.

After rear caliper´s and pads and sensor wire, and new bolts are fitted, pump the brake pedal with the ignition on, and just run around, and check there are no leaks from the caliper pistons.
Check the fluid level, and lower with suction syringe if necessary.

By the way, 1. When did you last change your brake fluid ?
2. Adjust your front wheel bearings end float ?

You could do this now before you fit the wheels.?

Let me know if you wish the details for that too ?

Good luck !

Don´t forget to give me a FixYa rating please !

John.





Then refit wheels, drop down the car,

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1 Answer

Rear brake pad installation 99 volkswagen passat


If you can't see diagrams(sometimes happens) let me know and I will get them to you

  1. Raise and support the vehicle. Remove the rear wheels.
  2. If equipped, disconnect the brake pad wear sensor from the harness.
  3. Counterhold the lower sliding pin using a thin open-end wrench and remove the caliper-to-sliding pin hex bolt.
  4. Pivot the caliper upward or if necessary remove the upper caliper-to-sliding pin hex bolt.
  5. Using a brake caliper retraction tool, select the appropriate sized piston press arbor and install the tool onto the brake caliper. Following the tool manufacturer's recommendations, use the tool to rotate the caliper piston clockwise as it is pressed into the brake caliper housing, until it is fully retracted.
0900c152800c30b8.jpgUse a thin open-end wrench to . . . 0900c152800c30b7.jpg. . . support the caliper sliding pin when removing the caliper mounting bolt 0900c152800c30d7.jpgUse a disc brake caliper piston retracting tool that will rotate the caliper piston as it is pressed into the caliper 0900c152800c30d8.jpgThe rear caliper piston is slotted to allow a retracting tool to rotate the piston when replacing the brake padsTo install:
  1. Clean the brake caliper and all sliding surfaces. With the caliper piston pressed fully back into the caliper housing, check for leaking fluid and damaged dust boots.
  2. If equipped, install a new brake pad wear sensor in the pad if the plastic part has been worn through on the old sensor. New sensors are not required unless the wire inside the plastic part has been exposed.
  3. Lubricate the slider bolts with approved brake grease.
  4. Install the brake pads onto the bracket assembly, and then carefully lower the caliper over the caliper mount. Check and make sure that the pad springs are correctly seated.
  5. Replace all removed caliper-to-sliding pin bolts and torque to:
  6. 1990-97 Passat models: 25 ft. lbs. (35 Nm)
  7. 1998-00 Passat models: 22 ft. lbs. (30 Nm)
  8. If equipped, connect the brake wear sensor wire to the harness. Check for a good connection as most problems with the sensor circuit are caused by faulty connections. Check that the wire is held by the loop in the dust cover and the connector is held at the clips.
  9. Install the wheels and hand tighten the lug bolts. Lower the vehicle carefully until the tires begin to contact the surface and torque the lug bolts to specification in a crisscross pattern to:
  10. M12 x 1.5 lug bolts: 81 ft. lbs. (110 Nm)
  11. M14 x 1.5 lug bolts: 89 ft. lbs. (120 Nm)
Feel free to contact if you have any questions

Nov 15, 2008 | 1999 Volkswagen Passat

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