Alternator options

[Deep Blue]

Thanks so much MIG!

Yes, extracted alternator with pulley - VW 03G903023 (14V / 180A).

I now believe the Bosch Part # is 0121715003.

With a Denso alternator I took out of my Land Rover I was able to buy a new carbon brushbox and it was fine again; you can also buy the regulator/rectifier unit as well.

Not sure how easy it is to repair one of these old VW alternators (once I know what the problem is)??? If the slip-rings are gone or coils, then that is of course way beyond me.

[Deep Blue]

The voltage regulator module looks to include the brushes. Do you have your current unit's part number?

079 903 803 - BOSCH
07K 903 803 - BOSCH
03L 903 803 D - VALEO

I just checked the service manual; VW has the TDI common rail listed as needing the bumper and crash bar removed in the "service position."

Check out ErWin is you want to download all your service guides.

Yes!!! Decided to take it to the mechanic, but he ordered the wrong alternator (ordered before he pulled the old one out - he said it was a real PITA getting it out!).

[Deep Blue]

I came across this (Ifixit Guide):

2011- 2017 Volkswagen Jetta Alternator Replacement (2011, 2012, 2013, 2014, 2015, 2016, 2017) - iFixit Repair Guide

It seems to be very close - if it is as simple as this then it's a no-brainer for me, just want to be sure before I start though.

Yes, not that simple!!! Lol!

[MIG]

The part they are quoting is the 03G903023X then for the refurb and core exchange.

Can you inspect the voltage regulator \ brushes? might be an option to just replace those?

Getting a part from the wreckers is always an option, too; prices look to be the $200 mark.

[Deep Blue]

The part they are quoting is the 03G903023X then for the refurb and core exchange.

Can you inspect the voltage regulator \ brushes? might be an option to just replace those?

Getting a part from the wreckers is always an option, too; prices look to be the $200 mark.

Any wreckers you could recommend? Live close to the city, but willing to travel up to 75km!

[MIG]

I have used City Wreckers Melbourne, I know they have several TDI models there, eBay also has listings on the part you could use to find places

Sent from my SM-N960F using Tapatalk

[Deep Blue]

Here's the wash-up:

Vehicle is a 2009 VW Passat CC 2.0TDI with the CBBB engine.

Original Old Alternator (removed):
VW AG
03G 903 023
14V 180A
BPN 40/08
0 121 715 003
Made in GB

"New" Alternator (installed):
VW AG
03G 903 023 F
14V 180A

Made in GB


So, the Bosch part number is: 0 121 715 003.

Looks like the old and "new" are Bosch made in GB and 14V/180A.

I'll see later if I can take the old alternator apart and find out if it's the brushes, regulator, or rectifier – I have fixed one from another vehicle where I replaced the brushes; the bearing seems okay.

Bought a second-hand working (see above) alternator from ADM in Campbellfield – taken out of a 2010 VW R36 with 147,000km. The alternator was quite hard to find! A new (exchange?) alternator from a VW dealer requires a swap, and also requires a new pulley (unless you can successfully remove the old pulley): $1213 + GST + $252 + GST. Not sure regards likely labour charge at VW dealer? The new Valeo alternator has to come from Germany and takes 3 months! The VW dealer said you can't interchange the Bosch and the Valeo!

Volkspower in Burwood did the work – you can't do it from the top like I did with the Land Rover; up on the hoist and a lot of faffing about (rail had to be removed to access it from below)! Big shout-out to Kevin at Volkspower Burwood!

Tried a number of places, including Grant Walker Parts and Ashdown Ingram to no avail looking for a replacement alternator. Choice between VW dealer and ADM – went with the second-hand unit from ADM and Volkspower gave me the old unit back.

All running well!

Now, has anyone ever taken one of these alternators apart??? The plastic back-cover looks to be held in with screws that just seem to be round in the middle???

Might research the starter motor next!

[Deep Blue]

Got mine for $135 from ADM in Campbellfield - was hard to find! Drove there, inspected it, and picked it up myself.

[Deep Blue]

Replaced brushes on a Land Rover (Denso) regulator - easier to remove as well - from the top (although had to remove a bit of stuff to get at it! Not sure with this one taken out from the Passat CC - looks in great nick! I can do the basics with a multimeter, so maybe I can repair it??? Problem is the plastic back cover I have to remove is held with four screws - they seem to be round in the middle - will try and get a photo posted!

[Deep Blue]

Just a moment...

Might show the replacement regulator/rectifier/brushes here???