2024 Fiat 500E Electric · SL74 UPS

The MAHLE-supplied onboard charger module, shared across Stellantis EVs, can fail and prevent AC charging entirely. DC fast charging still works because it bypasses the OBC. The part is expensive through Fiat but board-level repairs are available from EV specialists.

The 500e's 12V auxiliary battery powers all auxiliary systems and can drain rapidly, especially if the car sits unused for more than a week. A wiring fault under the passenger seat was identified by Fiat as a contributing cause. A software update (recall 6475) improved charging management but did not eliminate the issue entirely.