SEAT Leon 1.5 TSI DSG Random Battery Discharge
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Hello everyone.
I'd like to share an issue I'm having with my SEAT Leon to see if anyone has experienced something similar or has any advice.
My car is a 2023 SEAT Leon 1.5 TSI 150 HP DSG, purchased in November 2023. During the first two years it was absolutely faultless. It passed every scheduled service at the official dealership without any issues and had never given me any problems.
Recently, however, something very strange started happening. Completely at random, the battery is discharged after the car has been parked. Sometimes it starts normally, while other times the battery is almost completely flat, even though no lights or accessories were left on.
I took the car to the official dealership for inspection. They tested the battery and told me it was in good condition, and none of their diagnostic tests found any faults. They also checked the charging system, which apparently was working correctly.
Despite that, the problem continues. On several occasions the battery has gone flat unexpectedly, which makes me suspect there may be a parasitic battery drain or that one of the electronic control modules is not going into sleep mode after the car is switched off. Since the issue happens randomly, it seems difficult to reproduce during a standard workshop inspection.
I'm particularly concerned because the car is still relatively new and has always been serviced according to the manufacturer's maintenance schedule.
Has anyone experienced a similar issue with this generation of the SEAT Leon or with another VAG Group vehicle? If so, what turned out to be the cause? Any advice or experiences would be greatly appreciated, as I'd like to have some ideas before taking the car back to the dealership.
Thanks in advance!