BMW 640i xDrive Gran Coupe Air Conditioning Refrigerant Pressure Sensor Replacement Cost

Know what price you should pay to get your vehicle fixed.

The average cost for a BMW 640i xDrive Gran Coupe air conditioning refrigerant pressure sensor replacement is between $140 and $157. Labor costs are estimated between $61 and $78 while parts are priced at $79. Estimate does not include taxes and fees.
Note about price: The cost of this service or repair can vary by location, your vehicle's make and model, and even your engine type. Related repairs may also be needed. Talk with a RepairPal Certified shop to learn which repairs might be right for you.

How do Air Conditioning Refrigerant Pressure Sensors work?

On the high side, the high pressure sensor observes pressures to ensure the compressor is creating the needed line pressure to cycle refrigerant through the system, and the low side pressure sensor ensures the high pressure liquid has been converted to a low pressure gas in order to cool the evaporator core. If these sensors read incorrect pressures, they will report it to the control module, which will turn off the air conditioning compressor to prevent failure.

What are the symptoms of a bad Air Conditioning Refrigerant Pressure Sensor?

A malfunctioning high or low pressures sensor will cause the air conditioning compressor to cease function, may cause the air conditioning light to blink, or may allow the air conditioning compressor to run although line pressure is incorrect. Operation of the air conditioner is likely not intermittent, but will fail altogether.

Can I drive with a bad Air Conditioning Refrigerant Pressure Sensor?

There is no necessity to repair the air conditioner immediately. Replacement is based on convenience and comfort alone. In some locations, the heat outside may be sufficient to consider using a vehicle with no air conditioner a health risk for children or seniors, so this would raise safety concerns.

How often do Air Conditioning Refrigerant Pressure Sensors need replacement?

Air conditioning high and low pressure sensors are among the most common components that cause air conditioners to fail. This can be due to liquid in the system, external damage, wiring issues, or the sensor may be reporting a high or low pressure problem. Typically, these sensors will last quite some time before needing replacement, but failure can occur at any time.

How are Air Conditioning Refrigerant Pressure Sensors replaced?

Replacing these refrigerant pressure sensors requires the system to be evacuated of all refrigerant, the sensor unscrewed and replaced, and then recharging the system. If the vehicle uses an orifice tube, the technician will likely recommend replacing it while the system is discharged, and if signs of water contamination are present, the receiver drier or accumulator should be replaced as well. Finally, the system can be recharged, and the air conditioning system will be tested to prove the repair.

RepairPal Recommendations for Air Conditioning Refrigerant Pressure Sensor issues

We do not recommend the use of any off the shelf air conditioning refill products. These seldom work, and will cause clogs in the system and the expensive refrigerant recovery machinery. When the air conditioner needs service you can save time and cost by having a technician repair it properly the first time.

What to look out for when dealing with Air Conditioning Refrigerant Pressure Sensor issues

Discharging refrigerant into the atmosphere is hazardous to the individual releasing the refrigerant, and will cause harm to the environment. State and federal statutes prohibit this action, and all refrigerant must be extracted using a refrigerant extraction machine and recycled. Since a technician must vacuum the system to perform any refrigerant system repair, it is most wise to allow the technician to extract and recycle the old refrigerant also. Older vehicles will be required to retrofit the air conditioning system for newer, more environmentally friendly types of refrigerant, and this will cause additional costs during the air conditioning repair.

Can I replace the Air Conditioning Refrigerant Pressure Sensor myself?

This is not a repair that can be performed by the DIY mechanic unless refrigerant recovery equipment and vacuum and recharge equipment are on hand. Since this equipment is very costly, the most cost effective option is to have the air conditioner serviced by a professional.