What causes a rattling noise when accelerating in a BMW 4 Series?

I've noticed a rattling noise under the hood when I accelerate in my BMW 4 Series. What could be the cause of this and how can I fix it?

The most common cause of engine rattling noises in a BMW 4 Series is a worn-out timing chain. This can happen as the vehicle ages or if you don't keep up with regular maintenance. I recommend taking your car to a trusted mechanic to have the timing chain inspected and replaced if necessary.

Another possible cause of rattling noises in a BMW 4 Series is a loose heat shield. This can be caused by rust or damage to the mounting bolts. I suggest having the heat shield tightened or replaced to prevent any further noise.

Sometimes, a rattling noise when accelerating can be caused by a clogged fuel filter. If your fuel filter is dirty or clogged, it can restrict the flow of fuel to the engine, causing a rattling sound. I recommend having the fuel filter replaced to improve engine performance.