3-4 years is normal. We starting having trouble around 3.5 years in the 2010Battery dead at 54k. About 3 years. TDIs a bit tougher on batteries? Glow plugs, interrupted regens with fans blowing for a long time?
Thanks. I feel like I interrupt regens all summer.The CRs are really tough on batteries. Super high under hood temps, and lots of long cooling fan after running. The Passats are the worst.