BMW 645Ci Car AC Compressor Relay Replacement at your home or office.

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Car AC Compressor Relay Replacement Service

How much does a Car AC Compressor Relay Replacement cost?

On average, the cost for a BMW 645Ci Car AC Compressor Relay Replacement is $137 with $42 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2005 BMW 645CiV8-4.4LService typeCar AC Compressor Relay ReplacementEstimate$199.87Shop/Dealer Price$238.59 - $315.38
2004 BMW 645CiV8-4.4LService typeCar AC Compressor Relay ReplacementEstimate$179.87Shop/Dealer Price$218.62 - $295.43
Show example BMW 645Ci Car AC Compressor Relay Replacement prices

What is the AC Compressor Relay all about?

In order to operate, your air conditioning system needs to compress refrigerant to pressurize it. The compressor is both electronic and belt-driven. The AC compressor relay controls the supply of electricity.

The AC compressor relay acts as a control, turning the compressor on and off when necessary. It may be located close to the compressor (under the battery tray, for instance), but it may also be located in the under-hood fuse box, or somewhere else depending on the make and model in question. However, like all other relays, this one is subject to wear and tear, and eventual failure over time.

Keep in mind:

  • The AC compressor relay is not inspected during normal maintenance, but a serious malfunction will be noticeable during AC system recharges or other similar work.
  • Without a working relay, the AC compressor will not operate.

How it's done:

  • The AC compressor relay is verified to see if it needs to be replaced
  • The defective AC compressor relay is removed
  • The new AC compressor relay is installed
  • The AC compressor relay is tested for operation
  • The vehicle is tested to ensure proper operation of the AC compressor relay

Our recommendation:

The AC compressor relay is an integral part of the system. Without an operable relay, electricity cannot be sent to the compressor, and it will not function despite having a good belt, good clutch and other components. If your compressor does not function, have one of our expert mechanics diagnose the system and replace the AC compressor relay if required.

What common symptoms indicate you may need to replace the AC Compressor Relay?

  • Compressor will not turn on
  • AC system doesn’t blow cold air

How important is this service?

Having a functional AC compressor relay is essential to air conditioner operation. While the blower motor will still circulate air in the cabin, that air will not be cold because the compressor isn’t pressurizing refrigerant. This isn’t critical for vehicle operation, but it does affect driver and passenger comfort and the ability to clear foggy windows. If the AC compressor relay has been diagnosed as faulty, have it replaced as soon as you can.

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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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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.

Rodric

14 years of experience
414 reviews
Rodric
14 years of experience
BMW 645Ci V8-4.4L - Pre-purchase Car Inspection - Ontario, California
He was caught in traffic but made sure to call prior to arrival and kept in touch till he arrived. It was raining but he did a thorough review of the car. He got he on the phone before he left the dealership and walked me through the findings. I asked him to do a couple more items and he gladly obliged. I was very happy with the service.

John

27 years of experience
1019 reviews
John
27 years of experience
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.

John

27 years of experience
1019 reviews
John
27 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.

Excellent Rating

(24)

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

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