Main Relay Replacement at your home or office.

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Main Relay (Computer/Fuel System) Replacement Service

What is the Main Relay (Computer/Fuel System) all about?

Relays play a significant role in controlling the various electronic components of your vehicle, and there are several that can be termed a “main” relay. However, when you speak of the vehicle’s main relay, you’re referring to the one that controls the computer and the fuel system. It’s the first thing to engage when you turn the ignition switch. Without an operable main relay, your car won’t run. On most makes and models, the main relay will be located in one of the underhood fuse boxes, but this varies from one manufacturer to another.

Keep in mind:

  • The main relay is absolutely essential to vehicle operation.
  • The relay is not inspected during routine maintenance and is designed to last for many years before needing replacement.
  • Many other problems have similar symptoms, so professional diagnosis is important.

How it's done:

  • The vehicle relay main panel is opened
  • The defective main relay is removed
  • The new main relay is installed
  • The vehicle main relay panel is closed
  • The vehicle is started and checked for operation

Our recommendation:

Without an operational main relay, your car will not operate. However, electrical problems can be complex, and the failure of the main relay could possibly be a symptom of an underlying problem. It’s important that our expert mechanics diagnose both the condition of the relay and any inherent causes that contributed to the relay’s premature failure.

What common symptoms indicate you may need to replace the Main Relay (Computer/Fuel System)?

  • Fuel pump does not engage when ignition is turned to “on”
  • Vehicle will not start
  • Vehicle will not start when engine is hot

How important is this service?

There are few components as crucial to vehicle operation as your main relay. It operates both the car’s computer and the fuel system. If you experience any problems similar to the symptoms above, we recommend having your vehicle diagnosed immediately.

Fast and easy Main Relay (Computer/Fuel System) Replacement service at your home or office.

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Recent Main Relay (Computer/Fuel System) Replacement reviews

David

12 years of experience
210 reviews
David
12 years of experience
Great service
2000 NISSAN MAXIMA - ALTERNATOR - SACRAMENTO, CA

Henry

30 years of experience
47 reviews
Henry
30 years of experience
Henry was fantastic. He was timely and did a great job with the repair.
2008 JEEP WRANGLER - EXHAUST GAS RECIRCULATION/EGR VALVE REPLACEMENT - BERLIN, NJ

Ruben

13 years of experience
43 reviews
Ruben
13 years of experience
Ruben was very professional. He showed up ahead of our scheduled time. He did exactly what I asked for to be done in my vehicle. I would definitely be using Ruben again if I need some work done. He went over and beyond my expectations.
2008 INFINITI QX56 - STRUT ASSEMBLY REPLACEMENT (FRONT) - TRINITY, NC

Chris

12 years of experience
2 reviews
Chris
12 years of experience
I had Chris do a pre-purchase inspection of a car I was looking at from out of state. His inspection was thorough and he called me after to explain everything and answer my questions.
2015 MAZDA 3 - PRE-PURCHASE CAR INSPECTION - HIXSON, TN

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.

1-800-701-6230 · hi@yourmechanic.com