I need to change an alternator on a 92 Diablo. Anybody have a Bosch# or replacement?

My workshop book shows Bosch A-120-500-182 and I can't find it anywhere.
The alternator in the car right now has Bosch AL 170 in it, which is used in a Porsche 928GT..QQ I think someone used the wrong alternator last time it was changed and that's the problem.

Appreciate any feedback / info...

The Alternator " IS" a 928 GT Alt" , so it sounds like it has the correct one. You can get them rebuilt or buy a Bosch Rebuilt exchange.

This is getting crazy... Spoke to Bosch directly and they said the AL170 is for a CT - not Diablo and is wrong application. The original Bosch #with the "A" means it's propritary and can't buy in US other than dealer.

But he did go own on to tell me that a 1988 Ferrari Mondial is the same application.... trying to work that angle now.

BTW the current AL170 alternator is 85amp and the Diablo s/b 115 amp...may be part of the problem...

I'll get the Bosch part # for you when I get to the shop. The Alts actually still have the bosch label on them in many cases.

Cool... thanks ... I'm sure the Bosch # is 0120469667

Looks like I have to break down and give the dealer $1K. But the good news is that in the future when this one goes, I'll be able to rebuild it because now I know I have the correct one to begin with...

I've called NAPA main office, Bosch main office, etc etc. They all say dealer only in US. There's a guy who wants $500 for a used one in the UK, then when you add freight and all that... ya know...better off just getting a new one and doing it right...

Here's the numbers from a 98 Roadster complete Alt.

Bosch- 0-120-468-004-005

14v/115A........

Porsche part # 928-603-011-02

The Bosch Regulator/Brush Pack part # is 1197-311-021

EL 14V 4C is also on the reg but I doubt it has much significance in this case.

HTH's

JRV

ps: this is rebuilt (actually there was nothing wrong with it, it had a wiring harness issue, and it has been tested and works perfect. I'll take some pics and if the mounting brackets are the same I'll sell you this one for the same price as the one in Europe .

I have another Alt from a 93, and the bracket mounts appear slightly different.

This part # is 0-120-468-004-005 -- again 14V/115A

and the Porsche part # is 928-603-011-01

I'll take pics of them side by side and post later this evening.

Regards, JRV

just double checked, the mounting points are identical

Thanks a million! No need for pix... I'm on the case.

Here's some interesting stuff...

The old alternator made for a 928 that's in the car was purchased new from Ultimate Motors aka Lambo Orlando. I called them and they said AL170 is correct...they even called their Bosch rep and he said its the right one. Bosch headquarters said the rep is wrong and to have him call the head office to speak to them.... I'm still waiting for this to pan out.

Bottom line, appears Ultimate is selling AL170X (a $300 part) and charging $1,000 for it as though it is the original part....

They are the only dealer doing this... I called about 5 others....

Both of these Alts came directly off Diablos, one a 93, the other a 98.

They both have the original Bosch stickers still on them and I checked, both regulator/brush pacs have the same part # on them. So the ones playing games is not Ultimate, it's Bosch and Lambo .

But we've always known there was some game playing going on right

BTW: the last Bosch 928 part numbered Alt I bought ( from Bosch) was around $465 plus a $100 core charge, plus frieght both ways...so the real cost adds up quick.

ps: if you want to do a real test use those 928 part #'s and call a Porsche Dealer for some prices ...I think you will be surprised at their prices.

What's disturbing is the "X" in the part number means it's rebuilt...not new...