Symptoms of a Bad or Failing Main Relay (Computer/Fuel System)

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Cost of Replacing a Bad or Failing Main Relay (Computer/Fuel System)

Common signs include the engine not starting, inability to stay running for a long time, and the Check Engine Light coming on. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Main Relay (Computer/Fuel System) Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2005 Volvo S60 $87 $16.78 $70.00 30% $124.28
2011 Chevrolet Silverado 1500 $110 $39.80 $70.00 25% $147.30
2007 Suzuki Aerio $126 $55.98 $70.00 22% $163.48
2010 Land Rover Range Rover Sport $196 $125.98 $70.00 16% $233.48
2008 Mercedes-Benz ML350 $86 $16.35 $70.00 30% $123.85
2010 Porsche Boxster $88 $17.87 $70.00 29% $125.37
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How to Diagnose a Bad or Failing Main Relay (Computer/Fuel System)?

main relay

The engine computer in your vehicle is a very vital piece of equipment. Without this part of your car running the right way, it will be nearly impossible for you to operate the vehicle as intended. In order for this part of the vehicle to operate correctly, it will need the power that the main relay supplies. The main relay helps to ensure that the engine computer gets the power that it needs to run and function as intended.

The main relay is usually located underneath the hood in the relay box. The high heat that this relay is exposed to can create a lot of damage over time. When the main relay begins to malfunction, you will have to find a way to address the issues in a hurry. Failure to act quickly in a situation like this can lead to a lot of instability.

The engine will not start

Most car owners take their engine for granted until there is an issue with it. If the engine will not crank, then you will need to get the main relay checked out. If the main relay is not supplying the engine computer with the power it needs, then the engine will not be able to crank and run the right way. Failing to get the main relay replaced will usually lead to the car being unusable.

The car can’t stay running for long periods of time

If the car cranks and then dies almost immediately after, then the main relay may be to blame. The only way to ensure that this problem stops is by taking the time to get the relay tested and replaced if needed. Having a car that cuts off all of the time can be very frustrating and dangerous in certain situations. Replacing the main relay is the only way to regain the consistency that your vehicle has lost.

The Check Engine Light is on

When the Check Engine Light on your car comes on, then you will need to take the time to have it looked at. The best way to find out why the light is on is by going in to a shop that has diagnostic equipment. They will be able to pinpoint what issues are causing the Check Engine Light to come.

engines
fuel system
Check Engine Light

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Recent Main Relay (Computer/Fuel System) Replacement reviews

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YourMechanic Main Relay (Computer/Fuel System) Replacement Service

Average Rating

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Number of Reviews

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Christopher

17 years of experience
55 reviews
Christopher
17 years of experience
He worked and discovered the problem with a relay. The problem was not readily apparent since the relay did work but was causing a voltage drop and did not supply 12 volts to the sensors.
2007 MITSUBISHI ECLIPSE - MAIN RELAY (COMPUTER/FUEL SYSTEM) - ZEPHYRHILLS, FLORIDA

Chris

19 years of experience
1240 reviews
Chris
19 years of experience
Very honest, professional and knowledgeable
2003 MERCEDES-BENZ SLK320 - MAIN RELAY (COMPUTER/FUEL SYSTEM) - NEWPORT BEACH, CALIFORNIA

Miguel

32 years of experience
181 reviews
Miguel
32 years of experience
Miguel seemed very competent and took time and took time to answer questions for me. Top notch experience!
1998 CHEVROLET ASTRO - MAIN RELAY (COMPUTER/FUEL SYSTEM) - JACKSONVILLE, FLORIDA

Chris

13 years of experience
397 reviews
Chris
13 years of experience
Great job!
1995 HONDA ACCORD - MAIN RELAY (COMPUTER/FUEL SYSTEM) - SAN FRANCISCO, CALIFORNIA

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