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BMW 645Ci Brake Light Switch Replacement at your home or office.

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Brake Light Switch Replacement Service

How much does a Brake Light Switch Replacement cost?

On average, the cost for a BMW 645Ci Brake Light Switch Replacement is $190 with $50 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2004 BMW 645CiV8-4.4LService typeBrake Light Switch ReplacementEstimate$255.88Shop/Dealer Price$287.40 - $367.79
2005 BMW 645CiV8-4.4LService typeBrake Light Switch ReplacementEstimate$246.87Shop/Dealer Price$275.30 - $353.37
Show example BMW 645Ci Brake Light Switch Replacement prices

What is the brake light switch and how does it work?

The brake light switch is a mechanical switch activated when you press the brake pedal. The switch has a plunger in it that contacts a lever in the brake pedal assembly. As that plunger is depressed when you push on the brake pedal, the contacts in the brake light switch closed and voltage flows to the brake lights — turning them on. The brake light switch is also in the circuit that controls the cruise control disengagement and the shift interlock safety feature installed on all newer cars. Failure of the brake light switch occurs due to wear on the internal electrical contacts in the switch, poor switch terminal connections, maladjustment of the switch, or damage to the brake pedal assembly.

When to consider replacing the brake light switch?

  • No brake lights. If depressing the brake pedal does not cause any of the brake lights to illuminate, the continuity of the switch will be tested. If only one brake light is out, then the issue is not the switch but rather the bulb, bulb socket or brake light circuit integrity.
  • Unable to shift out of park. The brake light switch is also wired into the shift interlock mechanism. If you are unable to shift out of park, with your foot on the brake, check to see if the brake lights will illuminate as you push the pedal. If they do not illuminate, failure of the brake light switch may be the cause of the no shift.
  • Intermittent operation of the brake lights or late operation. The brake light switch has to be in the proper position, and work consistently if the brake lights are to come on the instant you press the brake pedal. The switch can sometimes require adjustment, or the contacts may degrade, causing inconsistent operation of the switch.

How do mechanics replace the brake light switch?

  • The switch is first tested using a multimeter, including the terminal contacts to the switch, to determine if it is faulty. If the switch is functioning, the entire circuit must be tested to determine the cause of no brake lights.
  • Should the switch be judged defective, the switch is unthreaded from the mounting boss near the brake pedal assembly.
  • The new switch is threaded in and locked with an appropriate locknut once the new switch is properly adjusted.
  • The operation of the switch is tested to ensure instant illumination of the brake lights upon pressing the brake pedal.

Is it safe to drive with a brake light switch problem?

No. Should the brake light switch have failed, it is unsafe to drive the vehicle because drivers behind you will have no indication that you are slowing, intend to slow, or are stopped. Always address a failure of this type promptly to ensure your safety while driving.

When replacing the brake light switch keep in mind:

  • The mechanic will test the brake light switch directly to ensure that the issue is not elsewhere in the brake light circuit.
  • Occasionally, the issue is a maladjusted switch or a loose contact, and the mechanic can resolve the problem without switch replacement.

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Number of BMW 645Ci services completed
286+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
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Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(26)
Rating Summary
22
1
2
0
1
22
1
2
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1

Tien

24 years of experience
903 reviews
Request Tien
Tien
24 years of experience
Request Tien
by Duke
BMW 645Ci V8-4.4L - Battery Terminal - Positive - Oakland, California
Mr. Tien is a highly professional mechanic, who performs his work in a fantastic manner. In addition, when i was confused about something done, he was patient and humble in providing the right response. Definitely high on my list for all future repairs to my cars.

Patrick

33 years of experience
369 reviews
Request Patrick
Patrick
33 years of experience
Request Patrick
by milan
BMW 645Ci V8-4.4L - Oil Change - Las Vegas, Nevada
He seems professional. I paid for the lights to be addressed and they are all still on including a low engine oil light. He said he would return to check it out further after his next appointment but I did not hear back from him. I was told by BMW that the power steering fluid needs to be drained, flushed and refilled. He sucked it out with a hose twice and this will not ensure that the oil that was accidentally placed in there would be completely removed. I am no mechanic but I am going off of what BMW told me. I wanted to get a lot more work done. I want all the lights to be addressed and fixed so I started with the check engine lights to be looked at and not just reset. I want everything to be fixed. Thank you

Emmette

37 years of experience
282 reviews
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Emmette
37 years of experience
Request Emmette
by Brady
BMW 645Ci V8-4.4L - Power Steering Belt - Stafford, Virginia
Once again Emmette was outstanding! He arrived early and did a great job. I will continue to recommend him to my friends and family

John

33 years of experience
1126 reviews
Request John
John
33 years of experience
Request John
by ANDREW
BMW 645Ci V8-4.4L - Ignition Coil - Hitchcock, Texas
This guy knows his stuff. Prompt and courteous and got the jib done in a timely fashion.

Excellent Rating

(26)
Rating Summary
22
1
2
0
1
22
1
2
0
1
Number of BMW 645Ci services completed
286+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
experts on our platform
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

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