BMW X5 Knocking Noise When Accelerating

If you have a BMW X5, you may be experiencing a knocking noise when accelerating. If so, it’s time to take it to a mechanic. There are a few common causes of this noise. You can check the MAP sensor, Lifter, Fuel delivery system, or Transmission.

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MAP sensor

The first step in diagnosing a knocking noise is to check the MAP sensor in your BMW X5. The MAP sensor is connected to the engine’s intake manifold through a hose. Ensure that this hose is in good condition and free from debris. Additionally, make sure that the hose is connected tightly to the intake manifold. Then, use a scan tool to check the MAP sensor’s output voltage against full vacuum.

When the MAP sensor fails, the car’s engine may not be getting the right fuel mixture. This could cause your engine to bog, stumble, and stall. If this happens, you may have to replace the sensor as it’s inexpensive and easy to do in your own garage.


If your BMW x5 is making a ticking noise when you accelerate, you’re not alone. Typically, lifter noises are caused by a problem with the lifters. They can range in volume and frequency, and can become very annoying over time. The noise usually starts when you start the car, and disappears once the engine has been fully running. If the noise persists, however, it can indicate a bigger problem. This is important to diagnose, since a malfunctioning lifter can further damage your engine.

This noise could also be caused by a problem with the alternator belt, which carries power to the secondary components of the BMW X5 engine. While it’s not as critical as the timing belt, it’s still worth checking, as its failure can lead to an engine failure. The noise may be a sign that the alternator belt is slack, and the tensioner roller may be causing the problem.

Fuel delivery system

A knocking noise while accelerating may be a sign that the fuel delivery system is out of balance. This can be caused by a malfunctioning mass air flow sensor (MAF), which sends incorrect values to the engine control unit. To determine if this is the problem, you should perform a diagnostic procedure.

A fuel delivery system fault can lead to a number of problems, including a lack of fuel. When this happens, the engine check light will illuminate. A fuel delivery system failure may also lead to an error code of P0087. If this is the case, then you need to replace the fuel pump.

Another possible cause is an issue with the injectors. The injectors control the amount of fuel vaporised in the engine. Injectors also control the homogeneity of the fuel/air mixture. A noise made by these injectors could indicate a serious problem, which may require expensive repairs.


If you’ve noticed that your BMW X5 is making a knocking noise when accelerating, you might want to consider having it checked out by a mechanic. Transmission knocking noises are not uncommon and can be extremely frustrating. Fortunately, a simple diagnosis is easy to make.

First of all, the noise is most likely related to inadequate lifter lubrication. BMW recommends replacing the cylinder heads to correct this issue. This will make your car more efficient and stop the ticking noise. You should consult with a BMW mechanic who specializes in BMW repair to ensure that the problem isn’t a larger problem.

Another possible source of this noise is your BMW X5’s alternator belt. While this belt is not as vital as the timing belt, it’s still vital to your car’s performance. As a result, if it breaks down, your engine may fail. Alternatively, the noise can also be a sign that your alternator belt is too loose. The slackness of the belt may be to blame, or it could be a faulty tensioner roller.

Uneven tire wear

If your BMW X5 is experiencing an accelerating knocking noise, it might be a sign of uneven tire wear. This noise is also commonly associated with a bad wheel bearing. It may cause the car to pull to one side or feel ‘off’ in corners.

A good way to address this issue is by changing the tires. Changing the tires can extend their life. In addition, you should also adjust the tire pressure to maintain proper tire pressure. Most BMW models have RFTs, which typically wear faster on the outside edges.

Uneven tire wear is another problem that can occur on your BMW X5. If you’ve noticed uneven wear on the outside edges, it’s a sign that your tire is underinflated. Check the pressure recommendation located on the side of the tire to determine if you need to have it inflated. If the uneven wear is on the interior of the tire, your car’s suspension system may be compromised.