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

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(24)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(24)

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 $131 with $36 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2004 BMW 645CiV8-4.4LService typeBrake Light Switch ReplacementEstimate$187.51Shop/Dealer Price$223.14 - $290.66
2005 BMW 645CiV8-4.4LService typeBrake Light Switch ReplacementEstimate$167.51Shop/Dealer Price$203.17 - $270.71
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.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(24)

Rating Summary
20
1
2
0
1
20
1
2
0
1

Tien

23 years of experience
903 reviews
Tien
23 years of experience
BMW 645Ci V8-4.4L - Alternator - Oakland, California
As always, Tien is an excellent technician regarding the work he performed on my car. He was through, fair, honest, and an excellent professional. I strongly recommend him to others and will continue to use his skills as necessary regarding my cars.

Tien

23 years of experience
903 reviews
Tien
23 years of experience
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.

Tien

23 years of experience
903 reviews
Tien
23 years of experience
BMW 645Ci V8-4.4L - Car Thermostat Replacement - Oakland, California
Very professional, friendly, fair and knowledgeable regarding the repair. I strongly recommend his for any future repair work I would consider.

Grzegorz

41 years of experience
473 reviews
Grzegorz
41 years of experience
BMW 645Ci V8-4.4L - Battery - San Francisco, California

Excellent Rating

(24)

Rating Summary
20
1
2
0
1
20
1
2
0
1
Number of BMW 645Ci services completed
264+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
experts on our platform

Recent articles & questions

Is it Safe to Drive With a Cracked Rim?
The rim is a large metal circle on which the tire is placed. It creates the shape of the tire...
P0202 OBD-II Trouble Code: Injector Circuit Malfunction - Cylinder 2
P0202 code definition The P0202 code is a general OBD-II diagnostic trouble code (DTC) associated with the injector circuit. Note: This code...
How to Transport Your Car Overseas
Whatever the reason, whether for work or retirement, there may come a time when you want to ship (https://www.yourmechanic.com/article/how-to-choose-the-best-car-shipping-company) your vehicle overseas. When arranging for your vehicle to be shipped overseas, there are quite a few options and steps you...

Steering-wheel shaking around 45 RPM on a 2001 Tahoe

For steering wheels shakes, a lot of times, it's just your tires that are out of balance and you've got a worn front-end part like a bolt joint and tie rod that make it shake. But if your entire truck...

Crank bit won't turn over

This suggests you may have a fuel supply issue if you have confirmed that you do have spark. Try pulling one of the spark plugs out after cranking it to see if it is wet with fuel. If it is...

Starter

If striking the starter motor case with a rubber mallet brings the starter to life, that typically means there is a bad spot on the starter motor armature. The vibration from striking the motor simply moves the armature just enough...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com