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General => The garage => Topic started by: Clinton78 on 17 January 2018, 16:35

Title: 2003 2.0 GTi MkIV battery/alternator issues
Post by: Clinton78 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. :)

Title: Re: 2003 2.0 GTi MkIV battery/alternator issues
Post by: itavaltalainen 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).

Title: Re: 2003 2.0 GTi MkIV battery/alternator issues
Post by: Clinton78 on 18 January 2018, 16:55

Thanks itavaltalainen! :)