Author Topic: 2003 2.0 GTi MkIV battery/alternator issues  (Read 2474 times)

Offline Clinton78

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2003 2.0 GTi MkIV battery/alternator issues
« on: 17 January 2018, 16:35 »
Hi guys,

My Golf was sitting for a while and the battery was dead. I knew the battery was old so I just opted to buy a new one. I was advised to buy a high-performance battery so bought a "Bosch S5005 Silver Calcium, High Power Battery".

I installed it and took the car for a run. After a while, the "ALTERNATOR" - "WORKSHOP" warning light started flashing and beeping. It does this after driving the car for a few minutes.

Please excuse my ignorance as I am not very clued up on the finer aspects of engines etc, but because I fitted a high-performance battery does that mean I need an uprated alternator rather than the existing factory standard alternator in my Golf?

Or, is the alternator just on the blink and I just need a new one?

Cheers in advance for any advice. :)

Offline itavaltalainen

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Re: 2003 2.0 GTi MkIV battery/alternator issues
« Reply #1 on: 18 January 2018, 15:41 »
Your Bosch battery isn't really all that much high performance. It's just a decent quality standard battery.

I would guess your alternator is on the blink. Most likely the regulator, if you're lucky you can replace separately (assuming the rings are ok).
2019 Seat Leon ST FR DSG 135kW - eclipse orange - 23k miles

Offline Clinton78

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Re: 2003 2.0 GTi MkIV battery/alternator issues
« Reply #2 on: 18 January 2018, 16:55 »
Thanks itavaltalainen! :)