Best Prices for ECM-Power Relay Replacement

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How much does ECM-Power Relay Replacement cost?

It depends on the type of car you drive and the auto repair shop you go to. Our mechanics are mobile, which means they don't have the overhead that repair shops have. They provide you convenience by coming to your home or office.

ECM-Power Relay Replacement pricing for various cars

CarsEstimateParts CostLabor CostSavingsAverage Dealer Price
2012 Volvo XC90$177$30.58$145.99-27%$138.08
2012 Hyundai Genesis Coupe$174$27.58$145.99-28%$135.08
2011 Hyundai Azera$296$149.98$145.99-14%$257.48
2015 Mercedes-Benz E350$173$26.98$145.99-28%$134.48
2011 Audi A3 Quattro$174$27.58$145.99-28%$135.08
2010 Lexus IS F$195$49.18$145.99-24%$156.68

ECM-Power Relay Replacement Service

What is the ECM-Power Relay all about?

Vehicle development has evolved over the past several decades to a point where it seems every vehicle function is controlled by a computer, right down to the engine itself. This is actually the case for the engine and its related functions as it is controlled by the engine control module, or ECM. The ECM monitors and adjusts operation and power distribution to the fuel supply and injection systems, engine timing, exhaust gas recirculation, emissions, ignition system, and several other systems. In order to dispense power to operate these other systems, the engine control module requires power itself.

The power distribution center, or fuse block, located under the hood houses most or all of the vehicle’s fuses and relays. It contains a relay for the ECM that is powered up when the ignition key is turned to the on position. This ECM power relay acts as a switch that supplies power to the ECM. When the ignition is turned off, power switches inside the ECM relay and it no longer receives battery power. If the ECM power relay stops switching as it should, you will experience vehicle problems. When the relay is stuck open, no power will be delivered to the engine control module and the vehicle won’t start. If the relay is stuck closed, constant power will be sent to the ECM even with the engine turned off and the battery will drain.

Keep in mind:

  • The battery should be disconnected any time the electrical system is being serviced.
  • There are several problems which can cause your vehicle not to start, with the ECM power relay being one of them. Have the problem diagnosed by one of our expert technicians.

How it's done:

  • The ECM-power relay is verified that it needs to be replaced. The relay is located in the engine main fuse relay control box.

  • The defective ECM-power relay is removed from the control box by pulling it straight up and out of socket.

  • The new ECM-power relay is installed into the socket and the engine scanned for codes.

  • The engine is started and the ECM-power relay is tested for proper operation.

  • The vehicle is road tested for proper operation of the ECM-power relay and is then checked for codes.

Our recommendation:

The ECM power relay should last the lifetime of your vehicle unless there is a power distribution problem or moisture that causes it to fail. If your vehicle won’t start, have one of our expert technicians diagnose the problem and replace the ECM power relay if necessary.

What common symptoms indicate you may need to replace the ECM-Power Relay?

  • Engine will not start when the key is turned.
  • Engine doesn’t turn over when ignition is on.
  • Check Engine light is on.
  • Battery drain which may leave it weak or dead.

How important is this service?

Although it is extremely unlikely the ECM relay will cause your vehicle to stall or create a safety concern, your vehicle may not start or the battery may die while the ignition is off. In either case, you will need to replace the ECM relay.

Recent ECM-Power Relay Replacement reviews

Excellent Rating


Rating Summary


34 years of experience
1579 reviews
34 years of experience
Ford F-150 V8-5.4L - ECM-Power Relay - Dripping Springs, Texas
Patrick has always been on time and is a great communicator. He researched the issue with my truck and found a faster/cheaper solution to the problem.


8 years of experience
135 reviews
8 years of experience
Dodge Stratus V6-2.7L - ECM-Power Relay - Richmond, Virginia
Very helpful in trying to figure out the issue with my car. He was very respectful. I will be requesting him again


18 years of experience
66 reviews
18 years of experience
Dodge Ram 1500 V6-3.7L - ECM-Power Relay - Holiday, Florida
Within 10 Minutes of me requesting a mechanic i had a message from mathew. He was very curteous communicated well and did the job very well. I am very please with this service and will be deffinatly using it again. I am just happy my truck is back up and running , He saved the day and made a bad situation better so that my father and i had our vehicle up quick.


35 years of experience
342 reviews
35 years of experience
Ford Explorer V6-4.0L - ECM-Power Relay - Georgetown, Texas
Charles worked quickly and was very professional. He diagnosed my problem within minutes and was able to come back and fix it the next day. I am very happy with him.

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