One problem related to engine belts and pulleys has been reported for the 2018 Volkswagen Tiguan. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Volkswagen Tiguan based on all problems reported for the 2018 Tiguan.
When accelerating, engine does not respond accordingly. Engine hesitates to accelerate and will stay in the low rpms despite the pedal being full pushed in. After a few seconds(maybe 15-30sec), it will rapidly accelerate corresponding to where the pedal is. This constantly happens, it has occurred ever since I purchased the vehicle 1 year ago. I cannot tell if it is an issue with the engine, the transmission, or the electrical components between the 2. It makes trying to merge onto a highway, accelerate into another lane, or turn onto a street very dangerous as I cannot be certain when it will accelerate. This issue occurs in all modes (eco, normal, sport). I have taken this to a dealership once but they said they couldn't find anything wrong with it. Additionally, there is an issue with the side passenger seatbelt sensor. It keeps going off if I have my phone charging sitting on top of it or if I rest my hand on the seat.