Yes same part as the GS. Difficult to replace? Depends on your mechanically ability. You need to remove the intake inorder to change it out. I do know we've had guys successfully rebuild the in the U.S. Some guys are against rebuilds saying they don't last long, others say they are fine. I don't know of a specific upgrade personally.
I don't have experience of maserati alternators but have have had rebuilt alternators and starters in the past, none of them have lasted long , they probably only replace the non working part
The only rebuilds I buy now are OEM because all they use is the case
Having had a rebuilt alternator burst into flames in my spyder, I would urge against getting one repaired. They have a very hard life because they are sat in the V in the engine and get extremely hot. I reckon the parts some repairers use are just not up to the job, melt, short out and catch fire. IMO, best to use a standard OEM unit.
Thanks for all of the input!
I guess it's not a common enough car (or used widely in motorsport) to have aftermarket parts for this.
I'm waiting for a charging system test to double check the issue.
It could still be the (just) less than 3 years very expensive Bosch S6 S6008 AGM battery (70 Ah / 760 CCA) has packed up. But I'm thinking alternator as the battery is reading 11.6V at idle - even after a full charge overnight with a Ctek 10A smrat charger (I was expecting 13V+ at the very least).
If it's the alternator, I'll buy a new one rather than refurbished (looks like they are about £450).
If for some unlikely reason it's the battery, maybe it's under warranty (it was seriously expensive as batteries go). Strangely, the highest Ah battery I can find in the 096 size is a calcium based one:- Yuasa from Halfords that claims 80 Ah / 760 CCA). I went for AGM originally as (a) no leakage likely or venting required, (b) thought it would survive vibration better, (c) thought it would tolerate shorter journeys / lots of electrical devices better
