3b alternator p/n

[s2driveruk]

just trying to cross reference something and need to confirm the bosch/audi part number. mine is a 3b with a/c.
Thanks
David

[Nuvo]

Hi David, the part number you are looking for is 034 903 015 F. I don't have the Bosch number to hand. HTH.

034 903 017 BX is the exchange item part number should you need it.

[s2driveruk]

thanks

[Nuvo]

Have you got charging problems? My alternator seems to be working intermittently at the moment. I've still to take a look at it. Being intermittent by its very nature could prove fun when fault finding.

We'll see.

[s2driveruk]

yep, battery as flat as a pancake, only seems to charge when revs get above 2k rpm. Ordered a new VR but Bosch supplied replacement is wrong part.

Just dug a load of S2 related info up on another thread and found the 15v version which had been mentioned a few times so will go for that

Hope you get it sorted

David

[Nuvo]

I was just reading that very thread. I wasn't aware of a 15V VR being available.
My standard Bosch VR is relatively new (about 1 year old). My alternator belt is slipping when under load so I'll start from there.

Cheers.

[s2driveruk]

£21.39 delivered from Wood Auto Parts for the 15v regulator

[s2_bo]

David, let us know if the 15v VR solves the charging problem. Mine only fires up to charge mode after about 2K too and Voltage doest go above 13V.

[caterpillar]

check out earth wire: the current goes both ways. if you have the bad earth wires, you WILL have bad charges at the battery
i have suplied the org earth wire from batt to the engine with a 70mm(!!) and have it in a 10mm bolt in the block, with star washer...
REALLY BAD wires in audi/vw gives some really pain in the ***!
the generator gives main + to the starter, and main + may be damaged somehow too.
spec if you have the batt in the coupe( under backseat)
look out in right front wheelhousing, upon the frame. the main + goes there, and the seering mai have damaged the wire there

[s2driveruk]

David, let us know if the 15v VR solves the charging problem. Mine only fires up to charge mode after about 2K too and Voltage doest go above 13V.

Ditto Bo........though I will check all the earth straps/positives now too