Updated at: 20-07-2022 - By: Lucas

One of the most common issues with BMW vehicles is DME failure. While this may be true, classic BMWs are widely regarded as among of the world’s most luxurious and best-looking automobiles.

An engine control system called Digital Motor Electronics (DME) is responsible for directing all of the engine’s functions. Engine performance and reliability are both improved by using the DME system in a car. But the greatest benefit of DME is the reduction in pollutants and the reduction in fuel usage.

After a while, it’s normal for electronic devices to stop working properly. The BMW DME is an electronic device, thus it is susceptible to malfunctions. If the DME fails, the car’s performance will become erratic, and the driver may not even be aware of the problem. Whether a DME fails, how can you detect if you have problems with your BMW?

What are the signs of a failing BMW DME?

If you see any of the following signs in your vehicle, you may have a failed DME. Reduced engine performance, engine misfires or stalls, inability for vehicle to start and illumination of the check engine light.

DME failure symptoms

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1. Low engine performance

The engine’s fuel system is affected when the DME has a problem. As a result, the car’s acceleration, power, and fuel efficiency will all suffer as a result of the engine’s complete fueling system being badly affected.

2. Misfiring or stalling of the engine

Misfires are a common annoyance for car owners. In some circumstances, malfunctioning DMEs are to blame for engine misfires. Whenever the DME malfunctions, the computer system responsible for the car’s engine stalls or misfires intermittently. Erroneous data from the DME can cause intermittent misfiring of the engine, however this is not always the case.

3. The car failing to start

When your automobile won’t start, it can be a terrifying experience. You may question if there is anything that could go wrong. If you suspect that your car’s gasoline supply is low, you may discover that it has enough fuel to start. As a result, the biggest mystery remains: why won’t the car start?

Only a malfunctioning DME might have been the cause of the problem. Control is provided by the DME system in the operation of the engine. Engine control is compromised when the BMW DME fails. Because of this, it won’t be able to function normally.

The engine will be subjected to cranking, which could prevent it from starting or necessitate considerable troubleshooting before it can get started. Fuel settings can also be impacted, which means that the engine may be unable to start.

4. Check engine light goes on

There are numerous reasons for the Check Engine Light to come on, but one of the most common is a faulty DME. A PC system or OBD scanner is connected to the engine and detects a problem in the circuit or sensors.

Check Engine Lights are activated when the OBD detects an issue with the engine’s electrical circuit. There will be check engine lights on as soon as a DME (electronic circuit) in the engine is developed.

5. More emission

The smooth operation of the engine is provided by Digital Motor Electronics. As a result, the full potential of the vehicle has been realized. Additionally, fuel economy is improved, resulting in reduced emissions of hazardous gases like carbon monoxide into the environment.

A malfunction in the DME system might have a significant impact on the engine’s performance. There is a need to have a correct air fuel ratio, a proposition that keeps the engine performing as required, something the DME system should help perform such a feature.

DME malfunction might cause engine fuel settings to be incorrect, thus it’s important to keep an eye on this. There may be an imbalance between the amount of air and fuel that enters the combustion chamber and the amount of fuel that needs to be burned. As a result, pollution will be produced in large quantities, which will be released into the atmosphere.

Solutions to a failed BMW DME system

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You don’t have to overlook strange symptoms in your car. Some concerns are more harmful to the health of your car than others since they can lead to more serious difficulties. Excessive gas emissions, such as those from your car, are harmful to the environment. It’s stressful when your car won’t start, especially when you’re in a hurry.

The car should be sent to a professional mechanic if any of the following symptoms are present: low engine performance, misfiring or stalling of the engine, failure to start the vehicle, check engine lights on, and increased emissions.

It is necessary to replace the DME or ECU once it is confirmed to be causing these symptoms. This is the only way to get rid of the symptoms caused by a faulty DME in your vehicle.

How much does it cost to fix DME issues?

It might be difficult to correct DME problems, especially if the damage is extensive. Fixing these problems can cost a lot of money, and the reasons for this are several.

Damage severity, kind of replacement, time spent working on it, and the technician you go to are all considerations to consider. DME repair is less expensive than replacement when there are only minor concerns.

There are three DME repair choices to weigh, but the final cost will be determined by the model of the vehicle. Three hundred to six hundred dollars will be needed to fix the current DME. In the range of $500 to $1000, you may expect to pay for a remanufactured DME.

You should expect to pay between $2,000 and $3,500 for a new DME from a BMW dealership. Ninety-nine dollars is the cost of the DME testing services.

Can I remove the DME from the car?

DME removal is possible, but it requires work and understanding of how to proceed. Damages can be caused if it is done incorrectly.


When it comes to achieving the best possible performance, acceleration, and fuel economy, the BMW DME or PME, also known as the Engine Control Unit (ECU), is a critical component.

When DME malfunctions, however, you may notice strange problems with your automobile, such as poor performance, excessive gas emissions, high fuel consumption, an inability to start your car, and more.

When a problem is detected in an engine circuit by the PC’s computer system, it sends out signals to the relevant sections of the car in order to underperform or indicate an issue.

It’s best to contact a skilled mechanic if you see any of the above symptoms in your automobile and suspect a malfunctioning DME.