I originally had this battery in my Audi A4 (which it is designed to fit), worked fantastically. Car died, I kept the battery and found it fit perfectly in my Volvo 240. I have had a real bout with alternators and voltage regulators, (of no fault to the battery), I finally designed my own voltage regulator for the Volvo and despite the car running on solely on the battery and the battery being drained to nothing, repeatedly, 10 years later the battery is still kicking! I now install this battery in all of my customers Volvo 240s.
The Group size is apparently wrong. It DOES NOT FIT. These are fine batteries, but make sure you know this will not fit your 2003 Jetta GL.
Reliable, reasonably priced.