Specified Values
WARNING: This page is about a different car, the 2018 Volkswagen Jetta, 2017 Volkswagen Jetta, 2016 Volkswagen Jetta, and 2015 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
High-Pressure Side:
Increasing from pressure with engine not running to a maximum of 20 bar (290 psi).
Low-Pressure Side:
Decreasing from pressure with engine not running down to 1.3 bar (18.9 psi).