Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2016 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You

Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

Thread Tools
Old August 18th, 2016, 10:11   #31
Join Date: Oct 2005
Location: Ottawa, ON

This saved me hours of work and hundreds of dollars! Thank you!

My 2002 Jetta, with 348000 km finally stopped charging. This thread helped me pull the old regulator off, and buy a replacement (knock-off) from my local garage for $75CAD. I could have bought one a lot cheaper online from Sofia, Bulgaria, but the delivery time was about three weeks.

The dealership quoted $512 for a new alternator, or $155 for a new regulator. At a local auto parts store, a remanufactured alternator was $284, and a regulator was $105.

I'm happy now.

**A note that Step 6 (remove 15mm nut) should come after Step 4.**
2002 Black Jetta GLS TDI 5-Spd Manual - 350,000km
*2005 Silver smart fortwo Passion Cabrio cdi - Written off *

Last edited by Uisge; August 18th, 2016 at 10:16.
Uisge is offline   Reply With Quote
Old December 13th, 2017, 15:28   #32
Veteran Member
Join Date: Jan 2012
Location: Greater New Orleans area
Fuel Economy: 45mpg hwy

Valeo vs Bosch

So my 2003 TDI Jetta wagon has a Valeo alternator which just started making the battery light illuminate on my instrument cluster and 11.5 volts show on my scangauge instead of more like 13.9 volts.

The disassembly process to access the regulator on my 2003 ALH TDI Jetta wagon's Valeo alternator is similar to the Bosch but not exactly the same.

I'll double-check the Valeo nut sizes and update this post when I go to reassemble things.

On my Valeo alternator
I carefully removed the plastic cap from the big main B+ wire's nut with a flathead screwdriver,
I removed that wire's retainer nut from the B+ stud, 13mm I believe,
I removed that wire's retainer clamp nut from an alternator housing stud at the opposite corner from the B+ wire's stud,
I lifted the locking tab and unplugged the 2-wire connector off the regulator,
I removed the two 7mm cover retainer nuts with a deep socket and the cover easily slid off.

At that point there are just 3 small bolts holding the regulator to the alternator housing and a plastic brush assembly cover/cap attached to the regulator.

The Valeo regulator is completely different from the Bosch versions, I don't see any part numbers on the regulator itself, and a google search isn't helping so at the moment I don't know what a good replacement regulator part number for my 120A Valeo alternator is and the ones I am finding are all far more expensive than the Bosch ones.

My primary reason for adding this post to this thread is to let others know that there is more than one brand of alternator available for these vehicles and different types of regulators that are not all interchangagle depending on the brand so you need to look at what alternator you have before buying any parts.
zukikat is offline   Reply With Quote
Old June 1st, 2018, 09:50   #33
Veteran Member
Join Date: Nov 2002
Location: DC (really Fairfax county, but it is easier to say DC)
Fuel Economy: ?/38/?

This thread just made my life so much easier. Isonic’s update with pictures and the differences he noted were especially helpful.
Last Friday, my car started getting an alternator workshop code that was going on and off. I have the full MFD so it might just be the battery light on other clusters. When I got home I open the hood and poked around. My battery voltage was low but I could hear my alternator engaging and then turning off. It wasn’t getting the battery charged enough so I figured it was the regulator.
Following the advice here I ordered a no name one off eBay for $25 from some place in Chicago and was lucky to have them ship that day so even with a holiday weekend I received it on Tuesday. Took an hour on Wednesday morning to install. Everything is working great. As a bonus, my right HID was having issues igniting and with the new regulator that issue is resolved! Thanks everyone!
DC-TDIWagon is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Alternator, Replace voltage regulator or rebuild/buy rebuilt alternator? TDI Jim VW MKIII-A3/B4 TDIs 2 February 19th, 2008 16:37
where can I purchase brushes for alternator ? vwtdi04 Ontario 8 June 1st, 2007 19:08
Alternator? Regulator? almus VW MKIV-A4 TDIs (VE and PD) 8 October 3rd, 2006 17:38
replace voltage regulator and brushes? bjapundza TDI 101 3 October 26th, 2005 12:24
A-3 Alternator / V. Regulator Herm TDI VW MKIII-A3/B4 TDIs 3 May 4th, 2004 19:55

All times are GMT -7. The time now is 19:10.

Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2017
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2017, All Rights Reserved
Page generated in 0.08975 seconds with 11 queries
[Output: 61.94 Kb. compressed to 56.51 Kb. by saving 5.42 Kb. (8.76%)]