I replaced my last roadster one at 10 years to be safe Chris. My CX one when I bought it after 9 months at a dealer and 18 months old failed. The AA guy said AGM batteries often fail early (the CX uses an AGM but doesn't have start stop, I suspect to match the standard BMW charging profile) but both our Polos had battery life over 10 years & they were/are AGM.

6 years seems very low to me.


JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"