What causes an Audi A4 to lose acceleration while driving?

I recently noticed that my Audi A4 starts to lose acceleration while I'm driving at high speeds. What could be causing this issue and how can I fix it?

One potential cause for this loss of acceleration could be a blocked fuel filter. Make sure to regularly check and replace your fuel filter to prevent this issue. Another possible cause could be a malfunctioning oxygen sensor, which measures the amount of oxygen in your car's exhaust and can significantly impact your acceleration. Consider getting this sensor checked and replaced if needed.