My previous car was a 2005 2ltr TDI sport, BKD engine. Had it 9 years. Possibly the most reliable car I’ve ever owned. That said, It wasn’t totally without its problems during my ownership and it was getting a bit tired towards the end of my ownershi but it was a Great car, build quality better than my current 2012 1.4 tfsi. Never tuned mine, engine was totally stock.
They are plentiful and cheap now. Watch for rust in wheel arches , chasis, noisy, failing turbos