BMW 750iL Proportioning / Combination Valve Replacement Costs

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Proportioning / Combination Valve Replacement Service

How much does a Proportioning / Combination Valve Replacement cost?

On average, the cost for a BMW 750iL Proportioning / Combination Valve Replacement is $456 with $361 for parts and $95 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
1993 BMW 750iLV12-5.0L	Service typeProportioning / Combination Valve Replacement	Estimate$893.51	Shop/Dealer Price$1100.01 - $1660.47
1990 BMW 750iLV12-5.0L	Service typeProportioning / Combination Valve Replacement	Estimate$863.51	Shop/Dealer Price$1070.06 - $1630.55
1997 BMW 750iLV12-5.4L	Service typeProportioning / Combination Valve Replacement	Estimate$816.01	Shop/Dealer Price$1013.80 - $1567.71
1999 BMW 750iLV12-5.4L	Service typeProportioning / Combination Valve Replacement	Estimate$816.01	Shop/Dealer Price$1013.76 - $1567.64
1998 BMW 750iLV12-5.4L	Service typeProportioning / Combination Valve Replacement	Estimate$816.01	Shop/Dealer Price$1013.82 - $1567.76
1989 BMW 750iLV12-5.0L	Service typeProportioning / Combination Valve Replacement	Estimate$863.51	Shop/Dealer Price$1070.06 - $1630.54
1994 BMW 750iLV12-5.0L	Service typeProportioning / Combination Valve Replacement	Estimate$871.01	Shop/Dealer Price$1077.20 - $1637.42
1988 BMW 750iLV12-5.0L	Service typeProportioning / Combination Valve Replacement	Estimate$871.01	Shop/Dealer Price$1078.18 - $1639.13

Show example BMW 750iL Proportioning / Combination Valve Replacement prices

What is the Proportioning / Combination Valve all about?

Your braking system relies on hydraulic pressure to operate. When you depress the brake pedal, brake fluid is pushed through the system to the wheels. Fluid pressure is responsible for actuating both disc brake calipers, as well as drum brakes. However, there are numerous components in line between the brake pedal and the brakes themselves, including the combination valve.

The combination valve is responsible for metering fluid to disc brakes, as well as fulfilling tasks done by both the pressure differential switch and proportioning valve (which is responsible for reducing the fluid pressure in the lines leading to the rear drum brakes). This is necessary because of how brakes work in terms of lockup – the more weight there is on a wheel, the more force can be applied without locking up the brakes. In rear drum brakes, the weight on the wheel is comparatively small (the weight of the engine on the front wheels is considerable).

Keep in mind:

In modern cars that employ combination valves, replacing the entire valve body is necessary if the proportioning valve fails.
There is no way to check operation on this type of valve unless it has failed completely.
The valve may have failed due to many reasons, including debris in the brake fluid.

How it's done:

The defective proportioning combination valve brake lines are disconnected
The defective proportioning combination valve is removed from the vehicle
The new proportioning combination valve is installed and the brake lines are connected to valve
The brake system is bled and purged of air in the system and the brake fluid is refilled
The vehicle is road tested for proper brake operation

Our recommendation:

Follow your automaker’s recommendations on brake system service to ensure that the fluid remains in good condition and free of debris. Have your braking system maintained by our expert mechanics to ensure that any potential problems are caught as soon as possible. Driving with a failing proportioning valve puts you at increased risk.

What common symptoms indicate you may need to replace the Proportioning / Combination Valve?

Rear brakes lock up easily, particularly on wet pavement

How important is this service?

While it is still possible to drive with a failed or failing proportioning valve, it’s not recommended because it decreases your safety while increasing the risk of being involved in an accident because your rear brakes lock up under even light loads. Have the entire combination valve assembly replaced immediately.

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Melvin

17 years of experience

221 reviews

Melvin

17 years of experience

by Tj

BMW 750iL V12-5.0L - Mechanic Consultation - Atlanta, Georgia

Adam

16 years of experience

64 reviews

Adam

16 years of experience

by Vince

BMW 750iL V12-5.0L - Serpentine/Drive Belt - Plano, Texas

I highly recommend Adam to anyone needing work to their car or truck. I own 2 old BMW 750iL 12 cylinder sedans. I'm talking 25 and 28 years old. They both have been in storage for about 6 years. One of them had a broken fan belt which I called Mobile Mechanic to send some one to replace it. The person they sent was Adam. Adam was on time for our appointment. He called the day before to introduce himself and disgusted with me the work to be done. Upon his arrival the day of our appointment, he was very polite when he introduced himself to me. He then went to examine my car and what needed to be done in my presents. After his examination he informed me that my water pump may had seized up and it was what was causing the belt to break. He suggested there also may be other things wrong such as the fan clutch that is attached to the water pump may also be froze up. He suggested that I not put the belt on but take it to a garage for further examination. We agree to this and he left without charging me anything. What an honest guy. I did take his advise and the next day had the car at the garage and they found that Adam was right. Both fan clutch and water pump froze up and that is what caused the belt to break. Adam not only saved me the cost of replacing another fan belt which would have broken if he replaced it but also the possibility of getting stuck on the road when the new belt would have broken because of the other 2 problems. Adam was honest enough to inform me of the possible additional problems even at the cost of him not getting the original job he was sent to do. When I get the other car out of storage it is my intent to call Adam to check it out and let me know what needs to be done.

Agustin

10 years of experience

2 reviews

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Agustin

10 years of experience

Request Agustin

by Jeffrey

BMW 750iL V12-5.0L - Cooling System Flush - Miami, Florida

I was very satisfied by the service provided by Augustin. He was professional and courteous as well. I would recommend him to anyone.

Dayan

17 years of experience

23 reviews

Dayan

17 years of experience

by Jeffrey

BMW 750iL V12-5.0L - Battery - Miami, Florida

Daysn is an excellent mechanic. He doesnt give up until the job is done no matter how difficult. I recommend him to anyone.

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