BMW 645Ci Windshield Wiper Motor Replacement at your home or office.

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Windshield Wiper Motor Replacement Service

How much does a Windshield Wiper Motor Replacement cost?

On average, the cost for a BMW 645Ci Windshield Wiper Motor Replacement is $499 with $271 for parts and $228 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2004 BMW 645CiV8-4.4LService typeWindshield Wiper Motor - Front ReplacementEstimate$818.94Shop/Dealer Price$996.68 - $1435.41
2004 BMW 645CiV8-4.4LService typeWindshield Wiper Motor - Rear ReplacementEstimate$1349.58Shop/Dealer Price$1672.06 - $2544.82
2005 BMW 645CiV8-4.4LService typeWindshield Wiper Motor - Rear ReplacementEstimate$1349.58Shop/Dealer Price$1672.05 - $2544.81
2005 BMW 645CiV8-4.4LService typeWindshield Wiper Motor - Front ReplacementEstimate$770.94Shop/Dealer Price$948.66 - $1387.36
Show example BMW 645Ci Windshield Wiper Motor Replacement prices

What is the windshield wiper motor and how does it work?

The windshield wiper motor is a small electric motor. A shaft coming out of the motor connects to a linkage/transmission assembly that converts the rotary shaft movement of the motor to the linear, back-and-forth motion of the wiper arms across the windshield. In addition to the windshield wiper motor in the front, some SUVs, vans, hatchbacks and station wagons have an additional wiper motor mounted in the tailgate to keep the rear window clear.

When to consider replacing the windshield wiper motor?

  • No wiper function at all. Windshield wiper motors can fail, but prior to replacing the motor, the mechanic will check its power supply.
  • Wipers don’t park in the down position. There is an internal switch in the wiper motor that keeps the motor powered after you have shut it off to ensure the wipers park in the right spot. If that switch fails, the wiper motor must be repaired or replaced.
  • Erratic or slow wiper operation. If the electric motor or the transmission have worn excessively, you might experience erratic, intermittent, or slow wiper operation.
  • Grinding or clunking noises. Excessive wear in the motor transmission or wiper linkages may cause noise. A mechanic will determine the cause of the noise before performing repairs.

How do mechanics replace the windshield wiper motor?

  • Remove the cowl and any covers over the wiper motor and transmission assembly.
  • Remove the plug harness to the motor and disconnect the wiper transmission arm from the wiper motor.
  • Remove the bolts holding the motor and transmission assembly to the body of the car.
  • Install the new motor. The plug harness is usually keyed so it can only be inserted in one direction. If not, the proper polarity must be observed. Bolt the motor to the car body.
  • Cycle the motor several times by turning it on and off to establish the park position, then re-attach the linkage transmission assembly to the wiper motor.
  • Install all covers, cowling, and so forth and test operation of the motor on a wetted glass only.

Is it safe to drive with a windshield wiper motor problem?

Yes. So long as the weather is clear and there is no rain, snow, or ice, it is safe. However, if the wiper motor is not functioning properly driving in adverse weather conditions is quite risky and may even be impossible in heavy rain, which will often completely obscure your view through the windshield. Due to the unpredictability of the weather, it is always best to have the windshield wiper system in good working order.

When replacing the windshield wiper motor keep in mind:

  • Never turn on the wipers if the windshield wiper blades are frozen to the windshield or their path is blocked by snow or ice.
  • When the wiper motor is replaced, all the linkages in the wiper system should be lubricated.
  • The rubber inserts in the wiper arm have a lifetime of about 1 to 2 years. Replacing the inserts regularly will make it safer to drive in adverse weather.

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Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(24)

Rating Summary
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DeVaughn

26 years of experience
25 reviews
DeVaughn
26 years of experience
BMW 645Ci V8-4.4L - Brake System Flush - San Bernardino, California
A great Technician, I will request him in the future. A true professional. Don't lose him!

Gregory

31 years of experience
383 reviews
Gregory
31 years of experience
BMW 645Ci V8-4.4L - Brake Pads Replacement (Rear) - Littleton, Colorado
Great job!

Patrick

32 years of experience
369 reviews
Patrick
32 years of experience
BMW 645Ci V8-4.4L - Camshaft Position Sensor - Las Vegas, Nevada
Patrick is a great guy and really knows his stuff. Yourmechanic.com rips you a new one on parts and labor but i guess you pay for not having the headache. I paid 370 labor for 3 hours and 255 for parts that go for 65 bucks on parksgeek.com and even cheaper on a few other sites but for original bmw parts it is 65 and they charged 255. Fyi. If it can wait a couple days, buy the parts first

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.

Excellent Rating

(24)

Rating Summary
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Number of BMW 645Ci services completed
264+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
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