What are the most common reasons for poor engine performance in an Audi?

I have a 2018 Audi A4 with around 50,000 miles on it. Recently, I've noticed that the engine doesn't seem to be running as smoothly as it used to. It doesn't have as much power and I can feel a slight hesitation when accelerating. What could be causing this and how can I improve my engine's performance?

One possible explanation for your engine's poor performance could be dirty fuel injectors. Over time, they can become clogged with sediment and debris, which can affect the spray pattern and flow of fuel into the engine. This can lead to a decrease in power and responsiveness. I recommend taking your car to a certified mechanic to have the fuel injectors professionally cleaned.

Another common reason for a decrease in engine performance is a faulty oxygen sensor. This sensor measures the amount of oxygen in the exhaust and helps the engine adjust its air/fuel ratio for optimal performance. If it is malfunctioning, it can cause issues such as poor fuel mileage, hesitation, and even engine misfires. I suggest having your oxygen sensor checked and replaced if necessary.