Alfred_B. No need for Top Tier when you are adding in a megadose of what makes them more expensive. The $5.20 save basically paid for the PEA&fuel treatment added to clean the system and injectors.
The MAF is well upstream of that break in the system, which is why the computer is confused. Here is the order on the car:
Air Filter (Intake)-MAF-Turbo&Intercooler-Throttle body-et cetera...
The Aluminum bit in the photo is the Throttle body. So MAF is quite a journey upstream...
Right now, I am pondering if it is worth the extra $$ to replace the Turbo to IC pipework while I am at it. Unplanned costs are not pleasant.
**I don't quite know why I have seen it called the Throttle Body, as I thought this was a type of fuel injection point. This is a DI car. rooflessVW is probably more accurate with the Throttle plate term. I am only echoing what I read.