BMW 430i Proportioning / Combination Valve Replacement at your home or office.

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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 430i Proportioning / Combination Valve Replacement is $403 with $308 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2018 BMW 430iL4-2.0L TurboService typeProportioning / Combination Valve ReplacementEstimate$776.33Shop/Dealer Price$944.16 - $1416.17
2017 BMW 430iL4-2.0L TurboService typeProportioning / Combination Valve ReplacementEstimate$710.33Shop/Dealer Price$874.18 - $1343.20
Show example BMW 430i 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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Chris

22 years of experience
2247 reviews
Chris
22 years of experience
BMW 430i L4-2.0L Turbo - Oil Change - Lake Elsinore, California
Great job! Quick and very knowledgeable.

Matthew

33 years of experience
1247 reviews
Matthew
33 years of experience
BMW 430i L4-2.0L Turbo - Oil Change - Norfolk, Virginia
Excellent service! Matt was so friendly and kind. Thank you for helping me take care of my car. So easy and so fast.

Rodney

36 years of experience
551 reviews
Rodney
36 years of experience
BMW 430i L4-2.0L Turbo - Coolant Hose - Sacramento, California
Rodney is just a life saver and one hell of a mechanic if you have bmw he is magic with it and yet will try to save you money and time for labor to get the job done rite he don’t shortcut nothing very good at what he does it would be a mistake to take your car anywhere to have it worked on. All I can say is thank you Rodney for your service and the smile

Brian

23 years of experience
681 reviews
Brian
23 years of experience
BMW 430i L4-2.0L Turbo - Pre-purchase Car Inspection - Jacksonville, Florida
Brian was awesome. I talked live with him and he went over everything in great detail.....worth every penny I paid!

Excellent Rating

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Rating Summary
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Number of BMW 430i services completed
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services done by our mechanics
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