BMW 740i Electronic Control Relay Replacement Costs

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Electronic Control Relay Replacement Service

How much does a Electronic Control Relay Replacement cost?

On average, the cost for a BMW 740i Electronic Control Relay Replacement is $141 with $46 for parts and $95 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
1994 BMW 740iV8-4.0L	Service typeElectronic Control Relay Replacement	Estimate$207.35	Shop/Dealer Price$247.94 - $330.34
2014 BMW 740iL6-3.0L Turbo	Service typeElectronic Control Relay Replacement	Estimate$187.35	Shop/Dealer Price$227.97 - $310.39
2018 BMW 740iL6-3.0L Turbo	Service typeElectronic Control Relay Replacement	Estimate$187.35	Shop/Dealer Price$220.46 - $297.24
2016 BMW 740iL6-3.0L Turbo	Service typeElectronic Control Relay Replacement	Estimate$187.35	Shop/Dealer Price$227.93 - $310.32
1995 BMW 740iV8-4.0L	Service typeElectronic Control Relay Replacement	Estimate$187.35	Shop/Dealer Price$228.00 - $310.44
1999 BMW 740iV8-4.4L	Service typeElectronic Control Relay Replacement	Estimate$187.35	Shop/Dealer Price$227.97 - $310.39
2019 BMW 740iL6-3.0L Turbo	Service typeElectronic Control Relay Replacement	Estimate$192.35	Shop/Dealer Price$225.32 - $302.00
1997 BMW 740iV8-4.4L	Service typeElectronic Control Relay Replacement	Estimate$192.35	Shop/Dealer Price$233.39 - $316.11

Show example BMW 740i Electronic Control Relay Replacement prices

What is the Electronic Control Relay all about?

A wide range of electronic systems must work properly in order for the vehicle to operate. That means there is a need for several different controllers to ensure proper operation. One of the most important is the electronic control relay. You might be more familiar with the term “main relay” because of its role in vehicle performance.

The electronic control relay operates the fuel pump and sends power to the engine’s injectors. Without the main relay, fuel will not flow from the tank to the engine, and your injectors will not atomize gasoline into the combustion chamber. In short, your car wouldn’t run. Electronic control relays are subject to failure from a number of different problems, including outright failure, heat damage, cracked solder and more.

Keep in mind:

The electronic control relay may not operate, or may operate intermittently depending on the source of the trouble.
A number of other problems can masquerade as a main relay failure, so it’s vital that you have one of our expert mechanics diagnose the issue.

How it's done:

The electronic control relay is located and accessed then verified it needs replaced
The defective relay is removed from the vehicle
The new electronic relay is installed
The components that the electronic relay operates are checked for proper operation
The vehicle is road tested for proper operation

Our recommendation:

Traditional turnkey ignition the relay will click three times during the starting process. If you listen closely, you should hear a single click when you turn the ignition to “on”. You should hear another when the Check Engine light turns off. Finally, there should be a third click when you turn the key to the “start” position. If you do not hear a click at any of these three points, there may be a problem with the electronic control relay. Have one of our expert mechanics diagnose and replace the relay if required.

What common symptoms indicate you may need to replace the Electronic Control Relay?

Engine doesn’t start, especially in cold weather
Engine may not start a few minutes after turning it off
No sound from the fuel pump when the ignition key is turned to “On”

How important is this service?

Given the fact that the electronic control relay powers the fuel pump and your fuel injectors, it is essential to replace a faulty one. However, many other problems can present similar symptoms, so it’s very important to have the issue diagnosed by one of our expert mechanics.

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James

30 years of experience

877 reviews

James

30 years of experience

by Henry

BMW 740i L6-3.0L Turbo - Smoke from engine or exhaust - Kissimmee, Florida

Excellent and very knowledgeable mechanic! He went above and beyond to pin point what was causing the engine smoke. I highly recommend James , if you are in need of car maintenance or services!

Eduardo

19 years of experience

550 reviews

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Eduardo

19 years of experience

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by George

BMW 740i L6-3.0L Turbo - Spark Plugs - Houston, Texas

Eduardo is always very professional and prompt! He does an awesome job with every service request to my vehicle. I will trust him with all my required repairs and services.

Amir

16 years of experience

1 reviews

Amir

16 years of experience

by Aaron

BMW 740i L6-3.0L Turbo - Clicking or popping sound is coming from wheels Inspection - Airway Heights, Washington

Amir has been great so far. Excellent communication and very professional.

James

31 years of experience

690 reviews

James

31 years of experience

by Brad

BMW 740i V8-4.4L - Radiator Hose - Huntington Beach, California

1st time using this service and I have no regrets...James came with all the right parts and tools to tackle my job. Gave me a no nonsense evaluation of my car. Would definitely recommend.

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