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Brake Light Switch Replacement
 
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Pelican Technical Article:

Brake Light Switch Replacement

Nick Czerula

Time:

1.5 hours

Tab:

$35

Talent:

**

Tools:

Phillips screwdriver, trim panel tool

Applicable Models:

BMW 525i/xi Sedan (2004-07)
BMW 528i xDrive Sedan (2009-10)
BMW 528i/xi Sedan (2008-10)
BMW 530i/xi Sedan (2004-07)
BMW 530xi Wagon (2006-07)
BMW 535i xDrive Sedan/Wagon (2009-10)
BMW 535i/xi Sedan (2008-10)
BMW 535xi Wagon (2008)
BMW 545i Sedan (2004-05)
BMW 550i Sedan (2006-10)
BMW M5 Sedan (2006-10)

Parts Required:

Brake light switch

Hot Tip:

Use floor mat from vehicle to kneel on

Performance Gain:

Repair faulty brake light switch

Complementary Modification:

Replace brake light bulbs

The brake light switch is responsible for activating the brake lights when the brake pedal is pressed. Another brake light switch function is to switch cruise control OFF.

The brake pedal switch can fail a few different ways. You may have a brake light warning lamp illuminate in your instrument cluster, indicating a problem with the brake light circuit. If none of the brake lights illuminate and the fuse is fine, the brake light switch is most likely the cause. I have also seen where the brake lights stay on all the time and the warning lamp is also on. If the lighting control module detects a fault with the brake light switch, it will turn the brake lights on all the time. This is for safety. A few things to remember when checking your brake light switch: check the fuse (find location using fuse index in fuse panel), check brake light switch adjustment, (see steps below for how to adjust), inspect brake light bulbs and use a high impedance digital volt ohm meter (DVOM) when testing the circuit.

The brake light switch is mounted in front of the brake pedal. In this tech article, I will go over how to replace and adjust the brake light switch on BMW E60 vehicles.

Remember that your car may have been serviced before and had 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 you're 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. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Working at the lower trim panel above the pedal cluster, remove the four Phillips head screws (green arrows).
Figure 1

Working at the lower trim panel above the pedal cluster, remove the four Phillips head screws (green arrows).

There is one Phillips head screw remaining.
Figure 2

There is one Phillips head screw remaining. First, you have to remove a piece of carpet trim to access it. Working at the side of the center console, lever the carpet trim panel in the gap (green arrow) in the direction of the yellow arrow. As you lever, slide the carpet trim panel toward the rear of the vehicle. This will detach the clips. See the next photo for a photo of the clips.

The yellow arrows point to the carpet trim panel mounting holes.
Figure 3

The yellow arrows point to the carpet trim panel mounting holes. The green arrow points to the retaining clip. Note the shape of the clip. It has to be removed by sliding the panel toward the rear of the vehicle. Once the carpet trim panel is removed, remove the remaining Phillips head screw (red arrow).

Lower the trim panel enough to access the electrical connectors.
Figure 4

Lower the trim panel enough to access the electrical connectors. Disconnect the speaker (red arrow) and footwell light (green arrow) electrical connectors by pulling them straight out.

Working at the front of the brake pedal, disconnect the brake light switch electrical connector by pulling the connector straight up and out the brake light switch (green arrow).
Figure 5

Working at the front of the brake pedal, disconnect the brake light switch electrical connector by pulling the connector straight up and out the brake light switch (green arrow). The yellow arrow points to the brake pedal arm, while the red arrow points to the steering column, for orientation.

Once the electrical connector (red arrow) is removed by pulling up in the direction of the green arrow, detach the wiring harness from the mounting tabs (yellow arrow).
Figure 6

Once the electrical connector (red arrow) is removed by pulling up in the direction of the green arrow, detach the wiring harness from the mounting tabs (yellow arrow). This will allow for more room when reconnecting the new switch.

Remove the brake light switch by sliding it (green arrow) out of the mounting bracket toward the rear of the vehicle.
Figure 7

Remove the brake light switch by sliding it (green arrow) out of the mounting bracket toward the rear of the vehicle. Once the electrical portion of the switch is removed, pull the mount / adjuster (yellow arrow) out of the mounting bracket.

Press the brake pedal down and hold it.
Figure 8

Press the brake pedal down and hold it. Then slide the new brake light switch (green arrow) into the mounting bracket. Then, slowly release the brake pedal and let it come in contact with the brake light switch. As it makes contact, the brake light switch will automatically adjust to correct its position. To adjust the brake light switch, press the brake pedal down. Then push the brake light switch as far it will go into the mounting bracket. Slowly release the brake pedal and let it come in contact with the brake light switch. As it makes contact, the brake light switch will automatically adjust to correct position. Connect the electrical connector and check the brake light operation.

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Page last updated: Sat 12/3/2016 02:41:12 AM