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BMW 645Ci Differential Fluid Service Replacement at your home or office.

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Differential Fluid Service Replacement Service

How much does a Differential Fluid Service Replacement cost?

On average, the cost for a BMW 645Ci Differential Fluid Service Replacement is $126 with $31 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2004 BMW 645CiV8-4.4LService typeDifferential Fluid Service - Front ReplacementEstimate$176.95Shop/Dealer Price$209.94 - $269.54
2005 BMW 645CiV8-4.4LService typeDifferential Fluid Service - Front ReplacementEstimate$156.95Shop/Dealer Price$189.97 - $249.59
2005 BMW 645CiV8-4.4LService typeDifferential Fluid Service - Rear ReplacementEstimate$156.95Shop/Dealer Price$189.97 - $249.59
2004 BMW 645CiV8-4.4LService typeDifferential Fluid Service - Rear ReplacementEstimate$156.95Shop/Dealer Price$189.93 - $249.52
Show example BMW 645Ci Differential Fluid Service Replacement prices

What is the differential fluid service (rear axle oil service) all about?

The differential is a special gear box located between the drive wheels of your vehicle. It allows the drive wheels to turn at different speeds, as they must when turning a corner. Over time, high operating temperatures can cause the lubricating fluid in the differential to break down, developing a gummy texture that doesn't properly lubricate the gears. Replacing the fluid can help you avoid premature wear on the gears in the differential, and can even help reduce wear on drive-wheel tires.

Keep in mind:

Some vehicles do not have a drain plug. In these vehicles, the differential cover must be removed to drain the fluid. A new gasket is installed and the proper amount of oil is then added.

How it's done:

  • Check the fluid level
  • Drain and fill the fluid
  • Add the correct amount and specification of oil
  • Test drive vehicle and check for leaks

Our recommendation:

You should follow the manufacturer’s guidelines for when to change the differential fluid. Usually this is anywhere between every 15,000 and every 50,000 miles. However, all of the fluids in your vehicle should be checked during regular maintenance services.

What is a common symptom indicating you need a differential fluid service (rear axle oil service)?

  • Car is louder than normal

How important is this service?

When you turn your vehicle one way or the other, the wheels on one side of the car need to move at a different rate than the wheels on the other side of the car. The differential is a special gearbox that allows your wheels to do exactly that. It is located between the drive wheels, and helps the wheels turn at rates independent of one another. Like most parts of your car, the differential needs fluid to act as lubrication. When this fluid isn’t properly serviced, it can become contaminated. Contaminated differential fluid doesn’t work very well as a lubricant, and so your differential won’t be properly lubricated. This puts extra stress on the differential and wheels.

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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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Real customer reviews from BMW owners like you.

Excellent Rating

(24)
Rating Summary
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John

27 years of experience
1019 reviews
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John
27 years of experience
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by ANDREW
BMW 645Ci V8-4.4L - Engine is misfiring - Hitchcock, Texas
Wanna feel good about a service call, call this guy. Great knowledge of my vehicle and explained the issue in a way I could understand it.

Mauricio

40 years of experience
85 reviews
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Mauricio
40 years of experience
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by Demetri
BMW 645Ci V8-4.4L - Coolant is leaking - Woodland Hills, California
He was extremely knowledgeable .

Davin

27 years of experience
23 reviews
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Davin
27 years of experience
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by Christie
BMW 645Ci V8-4.4L - Alternator - Denver, Colorado
Davin was fantastic!! Thank you!

Patrick

32 years of experience
369 reviews
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Patrick
32 years of experience
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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

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
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

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