Why is my BMW 4 Series producing less horsepower than before?

I have noticed that my BMW 4 Series is not performing as well as it used to. The car is producing less horsepower than before and it feels sluggish while accelerating. What could be causing this issue?

There could be a few reasons for this decrease in horsepower. One possible cause could be a dirty air filter, which can restrict airflow to the engine and result in decreased performance. I would recommend checking and replacing the air filter if necessary.

Another possibility could be a clogged fuel filter. If the fuel filter is dirty or clogged, it can restrict the amount of fuel reaching the engine, leading to a decrease in horsepower. I would suggest getting the fuel filter replaced to see if it improves the car's performance.

It could also be an issue with the spark plugs. Over time, spark plugs can become worn out and can cause a decrease in engine power. I would recommend getting the spark plugs checked and replaced if necessary.