2025 Leon 1.5 eTSi MHEV DSG - 12v battery warnings

[oldglosracer]

Hi there,

What's the issue with the 12v battery charging on the 1.5 eTSi MHEV?

We keep getting warnings on the dash, 12v battery low, then followed by 12v battery critical turning off infotainment etc.

Is there a software update for it?

We've got it booked in next week at the dealership, but I'd like to have some information to give them, as sometimes they don't bother to check for technical bulletins.

Thanks

Rich

 

[oldglosracer]

Car is on the 2632 update

 

[NotApplicable]

So far, I have only ever seen those sorts of messages when the auxillary belt is a bit slack and not driving the alternator properly.
There may, of course, be another software specific issue i dont know about....

 

[oldglosracer]

So far, I have only ever seen those sorts of messages when the auxillary belt is a bit slack and not driving the alternator properly.
There may, of course, be another software specific issue i dont know about....

Thanks. Not even sure it has an alternator, maybe just a starter generator connected to the 48v battery.

 

[James_R]

There's a starter generator that starts the engine and charges the 48v battery. No starter motor.

There is a software update package available - PV4+KD that should resolve these issues. Once completed, the infotainment software version will rise from 2632 to 2768.

 

[oldglosracer]

There's a starter generator that starts the engine and charges the 48v battery. No starter motor.

There is a software update package available - PV4+KD that should resolve these issues. Once completed, the infotainment software version will rise from 2632 to 2768.

Thanks @James_R if I send you my VIN can you check it?