Always replace injector seals and Teflon rings after removal – they are one-time use.
Reconnect all plumbing, reinstall the fuel pump fuse, and cycle the ignition to the "ON" position (without cranking) 3 to 4 times to let the low-pressure pump prime the system. Inspect the entire area closely for leaks before starting the car. vw 1.2 tsi injector removal