What would people who've owned or own a car with the TFSI engine say is essential maintenance? I have just bought a 05 Audi TFSI DTM, it has had a recent rebuild inc the turbo but I am keen to keep it running in good order. Obviously things like oil changes and getting it serviced.
Basics are below. HPFP Cam Follower Inlet port cleaning Sump removal and oil Pickup change and clean up if its been subjected to longlife services. Replace the pcv with a revision r for piece of mind. Replace the diverter valve for a revision g one. Thermostats seem to be a common theme of failure also.
They are the part number suffixes DIVERTER VALVE 06F145710G Part 3 here - https://audi.7zap.com/en/rdw/audi+a4+avant/a4/2007-454/1/145-145065/ Apologies it looks like the latest revision PCV for a longitudinal TFSI is a revision L. PCV 06F 129 101 L Part 20 here - https://audi.7zap.com/en/rdw/audi+a4+avant/a4/2007-454/1/103-103077/#20
