Mitsubishi Sigma Proportioning / Combination Valve Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(1,937)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(1,937)

Proportioning / Combination Valve Replacement Service

How much does a Proportioning / Combination Valve Replacement cost?

On average, the cost for a Mitsubishi Sigma Proportioning / Combination Valve Replacement is $544 with $411 for parts and $133 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1990 Mitsubishi SigmaV6-3.0LService typeProportioning / Combination Valve ReplacementEstimate$983.73Shop/Dealer Price$1203.41 - $1830.97
1989 Mitsubishi SigmaV6-3.0LService typeProportioning / Combination Valve ReplacementEstimate$955.73Shop/Dealer Price$1175.44 - $1803.01
Show example Mitsubishi Sigma 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.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mitsubishi mechanics

Real customer reviews from Mitsubishi owners like you.

Excellent Rating

(1,937)

Rating Summary
1,810
72
15
13
27
1,810
72
15
13
27

Miguel

35 years of experience
258 reviews
Miguel
35 years of experience
Mitsubishi Montero Sport V6-3.0L - Crankshaft Harmonic Balancer - Jacksonville, Florida
He did the to my satisfaction

Kenneth

16 years of experience
113 reviews
Kenneth
16 years of experience
Mitsubishi Montero V6-3.0L - Transmission Fluid Service - Castro Valley, California
Arrived on time and did great work

Richard

19 years of experience
70 reviews
Richard
19 years of experience
Mitsubishi Galant L4-2.4L - Car is not starting Inspection - Hope Mills, North Carolina
Very informative and professional.

Robert

31 years of experience
641 reviews
Robert
31 years of experience
Mitsubishi Montero Sport V6-3.0L - Noise from engine or exhaust - Redwood City, California

Excellent Rating

(1,937)

Rating Summary
1,810
72
15
13
27
1,810
72
15
13
27
Number of Mitsubishi services completed
21307+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mitsubishi MECHANICS
700+
experts on our platform

Recent articles & questions

How Long Do Spark Plugs Last?
In In order to operate, your engine needs fuel and air. However, those two things alone won’t make it run. It needs a way to ignite the fuel after mixing it with air from the intake. That’s what your car’s...
How to Transfer a Car Title in Michigan
In In order to be recognized as the owner of a vehicle in Michigan, you must have a title in your name. Whenever ownership of a vehicle changes, the title must be transferred, which requires steps of both the previous...
The Guide To Colored Curb Zones in Hawaii
Hawaii Hawaii parking laws: understanding the basics It can be difficult to find a parking space in Hawaii. Some people feel that they don’t have to obey the law and that they do not have to be courteous to others...

How do I use the CD player?

Your car is equipped with a CD player as standard equipment. This gives you the ability to listen to the music of your choice on a CD, as well as the AM/FM radio. Using the CD player is pretty simple....

My car has had trouble down shifting. Usually starts after a few minutes of driving. Codes: P07A4 and P2701

Hi there. On your transmission there is an actuator (solenoid) for the Overdrive clutch. The code is coming as P2701 (https://www.yourmechanic.com/article/p2701-obd-ii-trouble-code-transmission-friction-element-b-apply-time-range-performance-by-jay-safford) for the Overdrive clutch actuator (solenoid) not working and is your main cause of the transmission shifting issue. The...

Tengo una 2005 chevy silverado 2500 motor 6.6 me avienta mucho humo y aceite por el escape ya remplase el turbo pero sigo con el mismo problema

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com