What are the most common issues with Audi A4 engines?

I am considering purchasing an Audi A4, but I have heard some negative things about the engine. Can anyone give me some insight into the common issues with Audi A4 engines?

One of the most common problems with Audi A4 engines is the oil consumption. Be sure to regularly check and change the oil, and consider using a high-quality synthetic oil.

Another common issue is the timing chain tensioner failure, which can cause extensive engine damage if not addressed. Have your technician check for any signs of wear or damage during regular maintenance.