Repeated 12V Electrical Issues on CUPRA Leon 2024 – Anyone

Oct 11, 2025
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Hey everyone,

I wanted to share my experience with my CUPRA Leon 1.5 eTSI 150 CV DSG (2024 hybrid) and see if anyone else has faced something similar.

My car has suffered from repeated 12V electrical issues — basically, the vehicle refuses to start.

It’s currently on its fourth repair visit, and while it was temporarily fixed, the problem has started appearing again.

Here’s a quick timeline of what’s happened:

1st time (Oct 2024): The car was simply restarted and returned to me.
  • 2nd time (Apr 2025): The 12V battery was replaced.
  • 3rd time (May–Aug 2025): The alternator was replaced after weeks of waiting for parts.
  • 4th time (Oct 2025 – ongoing): The 12V battery was replaced again, but the problem has returned. For example, one evening when I went to drive the car, the 12V battery warning light was on, and as soon as I started the engine, the light went off.
Each time the problem temporarily disappears but returns after a few months.

I’ve also had to travel several times between Pisa and Prato for these repairs, which has been both time-consuming and expensive.

Has anyone else experienced 12V or electrical system failures on their Leon eTSI hybrid?
If so, what was the root cause, and did CUPRA eventually find a permanent solution?
I’m now considering taking formal action / pursuing a claim to resolve this — has anyone successfully done this before?

Any insight or shared experience would be really helpful — thank you!
 

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