BMW 645Ci Differential/Gear Oil Replacement at your home or office.

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Differential/Gear Oil Replacement Service

How much does a Differential/Gear Oil Replacement cost?

On average, the cost for a BMW 645Ci Differential/Gear Oil Replacement is $171 with $31 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2004 BMW 645CiV8-4.4LService typeDifferential / Gear Oil - Rear ReplacementEstimate$216.96Shop/Dealer Price$238.75 - $289.95
2005 BMW 645CiV8-4.4LService typeDifferential / Gear Oil - Rear ReplacementEstimate$207.95Shop/Dealer Price$226.65 - $275.53
2005 BMW 645CiV8-4.4LService typeDifferential / Gear Oil - Front ReplacementEstimate$207.95Shop/Dealer Price$226.69 - $275.60
2004 BMW 645CiV8-4.4LService typeDifferential / Gear Oil - Front ReplacementEstimate$207.95Shop/Dealer Price$226.69 - $275.60
Show example BMW 645Ci Differential/Gear Oil Replacement prices

What is the Differential/Gear Oil all about?

Differential oil is a type of oil. Cars have a gearbox connecting the two axles. This gearbox is responsible for the conversion of engine power and its transmission to the wheels, allowing them to turn at varying speeds. This part of the car is called the differential, and lubrication is needed for it to function properly. Differential fluid, also called differential oil, provides the lubrication and cooling of the car’s differential. The fluid is there to protect the gears’ metal surfaces from friction, and to prevent overheating and burning.

Keep in mind:

  • Some vehicles have a front differential and others have a rear differential.
  • Some vehicles use a synthetic gear oil.

How it's done:

  • Check fluid level.
  • Inspect the rear housing for leaks.
  • Remove the cover (if the differential does not have a drain plug).
  • Install new gasket if needed.
  • Fill with new fluid.

Our recommendation:

Differential oil should be changed every 30,000 to 50,000 miles. You should aim to have the gear oil changed every 30,000 miles, but it’s a good idea to have a mechanic check the differential oil during regular maintenance services.

What common symptoms indicate you may need to replace the Differential/Gear Oil?

Gear oil is contaminated with metal particles or other substances.

How important is this service?

The differential is responsible for transferring the power from the engine to the transmission and the wheels, and for controlling how much power goes to each wheel. Like many aspects of your vehicle, the differential requires oil to act as lubrication. Differential oil allows the differential to move smoothly and consistently, which allows the vehicle to continue sending power to the wheels. If the differential oil is old, it may be contaminated with debris and metal shavings. This contamination will come into constant contact with the differential, which can cause severe long term damage to the differential.

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Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(26)

Rating Summary
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Luis

5 years of experience
302 reviews
Luis
5 years of experience
BMW 645Ci V8-4.4L - Water Pump - Richmond, Virginia
Luis is very knowledgeable on BMWs and repaired my water pump and thermostat a few weeks ago; issue still seems resolved thanks to his expertise! Highly recommended!!

Mauricio

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

John

33 years of experience
1126 reviews
John
33 years of experience
BMW 645Ci V8-4.4L - Oil Change - Hitchcock, Texas
Was a bit concerned about having a oil change on my BMW at my home. John was fantastic, wasn't a spot of oil anywhere to be found. Great job and very professional. Recommend this service to all.

Emmette

37 years of experience
282 reviews
Emmette
37 years of experience
BMW 645Ci V8-4.4L - Water Pump Replacement - Fredericksburg, Virginia
Excellent work. When we found a discrepancy in our work orders Emmet made a phone call and then went to pick up the parts he needed. Even with having to go to the parts store he was still done in under estimated time

Excellent Rating

(26)

Rating Summary
22
1
2
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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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