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Parking Brake Adjustment
 
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Pelican Technical Article:

Parking Brake Adjustment

Nick Czerula

Time:

1 hour1 hr

Tab:

$50

Talent:

***

Tools:

Long thin head flathead screwdriver, jack, 17mm socket,

Applicable Models:

BMW Z4 Convertible (2003-06)
BMW Z4 Coupe (2006)

Parts Required:

No parts required

Hot Tip:

Inspect cable for easy movement

Performance Gain:

Proper parking brake function

Complementary Modification:

Replace parking brake cables

BMW Z4 models are equipped with a mechanical parking brake. This parking brake is used to hold the vehicle stationary when not in use. The parking brake is operated via a handle in the vehicle cabin; actuated cables then engage the parking brake shoes. It is a show and drum style brake.

The system is compact and integrated into the rear brake rotor system. The rear rotor hub flange acts as the drum and the brake shoes are mounted to the backing plate. You can adjust your parking brake with the wheels raised off the ground. You do not have to remove the wheels. A quick check of the parking brake is to pull up the parking brake lever and listen to the number of clicks it makes until stopping. If your parking brake lever makes 10 clicks or more, it needs to be adjusted. Keep in mind, the parking brake is not strong enough to brake the vehicle when driven or when being moved by the engine.

Remember your car may have been serviced before and parts replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve as they grow older. If something seems different, let us know and share your info to help other users. Questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Working in the vehicle interior, lever the top of the parking brake lever boot out using a plastic prying tool.
Figure 1

Working in the vehicle interior, lever the top of the parking brake lever boot out using a plastic prying tool. Then pull out the parking brake lever boot (red arrow) to detach it from the center console. Pull it up and over the handle.

Using a plastic prying tool, lever the shift boot trim (red arrow) out of the center console.
Figure 2

Using a plastic prying tool, lever the shift boot trim (red arrow) out of the center console. You may even be able to pinch the shift boot and pull the trim piece straight out without prying.

Using a plastic prying tool, lever the plastic trim piece below the parking brake handle (red arrow) out of the center console.
Figure 3

Using a plastic prying tool, lever the plastic trim piece below the parking brake handle (red arrow) out of the center console.

Once the trim pieces are removed, look below the parking brake handle pivot (blue arrow).
Figure 4

Once the trim pieces are removed, look below the parking brake handle pivot (blue arrow). Locate the parking brake cable service lock (red arrow).

Remove one wheel stud per rear wheel while the vehicle is on the ground.
Figure 5

Remove one wheel stud per rear wheel while the vehicle is on the ground. Lift and support the rear of the vehicle. See our tech article on jacking up your vehicle. Rotate the rear wheel until the removed stud bore is at an angle pointing toward the rear bumper (red arrow). You should be able to see the parking brake adjuster (blue arrow) when looking through the hole of the removed wheel stud.

Using a long, thin flathead screwdriver, rotate the adjuster to down to back the parking brake shoes off.
Figure 6

Using a long, thin flathead screwdriver, rotate the adjuster to down to back the parking brake shoes off. Do this about 8 turns. For the driver side wheel, lever the adjuster up to expand the brake shoes. For the passenger side wheel, lever adjuster down to expand the brake shoes.

Check that the parking brake lever is in the released position (purple arrow).
Figure 7

Check that the parking brake lever is in the released position (purple arrow). Release the cable tension by engaging the service lock. Press the spring (green arrow) with a flathead screwdriver (red arrow) until the hook locks the spring in a compressed position. If the parking brake lever is not fully released, you will not be able to engage the service lock. The blue arrow points to the service lock, viewed from above.

Using a long, thin flathead screwdriver, rotate the adjuster to expand the parking brake shoes until the wheel cannot be turned and then back the adjustment off 8 notches.
Figure 8

Using a long, thin flathead screwdriver, rotate the adjuster to expand the parking brake shoes until the wheel cannot be turned and then back the adjustment off 8 notches. For the driver side wheel, lever the adjuster up to expand the brake shoes. For the passenger side wheel, lever adjuster down to expand the brake shoes.

Once you adjust both rear parking brake shoe adjuster, release the service lock by pressing it using your flathead screwdriver (red arrow) and unhooking it from the hook (purple arrow).
Figure 9

Once you adjust both rear parking brake shoe adjuster, release the service lock by pressing it using your flathead screwdriver (red arrow) and unhooking it from the hook (purple arrow). Working in the vehicle interior, pull the parking brake lever multiple times. Release the lever and confirm that the wheels rotate freely. Release the lever and then pull up 3 notches. Check that the rear wheels do not rotate and the parking brake warning light is ON. When done, install the parking brake lever boot and rear wheels studs. When checking, be sure the hook (green arrow) is not engaged. The blue arrow points to the service lock, viewed from above.

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Page last updated: Fri 12/2/2016 03:00:26 AM