I had the Software on my GTI updated (from 1803) to version 1890 last week and two days later (no idea if it is related), my car alarm went off for no apparent reason and stayed on, and on, and on.....!!
I was standing 30 yds away from the car when the alarm went off, and I could see that there wasn't a soul anywhere near it but, no matter what I did, it refused to deactivate. After 10 minutes or so of trying to turn it off with the key fob, and checking all of the doors etc it was still screeching away incessantly, so I started the engine, popped the fob in the key recess in the centre console and decided to head straight to the nearest VW dealers, situated about 10 miles away. I got about a mile down the road before the squealing noise stopped as suddenly as it had started, so I turned home, rang the dealers and booked it in for the fault to be investigated in slower time.
The dealers have now checked out the car and (Guess what?) they found a software issue. They have updated J533 (whatever that is?) and claim that this has resolved the problem.
We'll see!
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