One of the problems with working on an older car is that every time you touch something, something else always seems to break. My 2002 Audi TT is no exception. While doing the many maintenance items on my car, I accidentally bumped into the fuel pressure regulator (circled below in red). As a result, it started leaking fuel whenever the car was running.

The need to change out your fuel injector O-rings on the MK1 Audi TT usually isn’t something that is needed unless you have an issue like gas leaking at the fuel injectors. Replacing the fuel injector O-rings typically would be done when the fuel injectors would already be removed.