BMW Faulty Dme Relay Symptoms

The BMW DME relay is a common failure item on many BMWs. The relay is responsible for supplying power to the DME (engine management computer) and if it fails, the DME will not receive power and the engine will not start. There are several symptoms that may occur if the DME relay is failing.

What is dme main relay?

A main relay is a safety device used in factories, commercial buildings, and other industrial settings to keep equipment from operating if there is a power outage. When power is restored, the main relay opens, stopping the equipment from running until the power is completely restored.

How do you check a dme relay on a BMW?

There are several ways to check a dme relay on a BMW. The most common way is to use a scan tool to check the codes that are generated when the relay is activated. If the codes indicate that the relay is not working, then the relay may need to be replaced.

What is dme failure?

DME failure is a malfunction of the dme (dynamic magnetorquers) in an aircraft engine. These devices are responsible for the engine’s ability to generate thrust during taxi, take-off, and cruise.

When the dme malfunctions, the engine may not be able to generate enough thrust to move the aircraft.

What is BMW dme?

BMW DME (Digital Motor Electronics) is a communication system used by BMW vehicles. It is a computer-controlled system that controls various functions of the vehicle, such as the engine, transmission, steering, and braking.

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BMW DME is typically a self-diagnostic system that allows the vehicle to communicate with the BMW service network.


If your BMW has a faulty DME relay, you may notice one or more of the following symptoms: engine won’t start, starter engages but engine doesn’t turn over, engine turns over but won’t start, and/or intermittent starting issues. If you’re experiencing any of these problems, it’s important to have your BMW inspected by a qualified technician as soon as possible.