Advice needed please: 4Motion Haldex issue?

[kapowww]

Nice one! I had to change the whole haldex/rear diff assembly which cost ~$2000 (paid for by the dealer so all good).

Sorry to bring up such an old thread, but the issue didn't seem to be resolved above and when i experienced the same issue this post kept popping up in my Google searches.

My 2003 Bora 4motion had the exact same problem with the haldex unit locking up on tight turns and "hopping". I went and saw Seb at Euro Auto tech in Girraween and he replaced my haldex controller with one from another car with low kms. This completely resolved the issue immediately.

I suggest finding a second hand unit and getting it installed. Mine cost me about $200 including install.

Hope this helps!

[Bernoulli]

I suggest finding a second hand unit and getting it installed. Mine cost me about $200 including install.

Hope this helps!

I'm having the same issue and this thread has helped a great deal... But is anyone able to give me a part number for the controller?


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[LeStig]

Mine was doing similar things .... Take fuse 31 out all was quiet .... I had the haldex serviced - oil wasn't that dirty there just wasn't enough if it - and the noise grabbing grinding sound went instantly ... It's not hard to do an oil change ... Just mark sure you get ALL the oil into the right unit ...

[Dalelongy]

That's the same problem I am having with my 4motion bora as well

[mmatear]

I'm certainly no expert about cars so I thought some of the experts here might be able to guide me a bit.

I've got a 2006 Passat 4motion 3.2L Wagon which has just reached 100,000km. Bought it 2nd hand thinking VW is a reliable brand and the k's this car had done wasn't bad, but I've had a lot of trouble with it. The problem I have now involves the Haldex and rear diff. I've currently got the car at an authorised VW dealer in Perth because the car started making horrendous noises (knocking, clunking, grinding) while I was driving. It was that bad I stopped immediately and got it towed. The mechanics have told me that the Haldex Control Unit failed, which caused the Haldex/diff to go haywire. So they said I needed to replace the Control Unit - total $3,000.

Now they've done that and now they said the noise from the diff area is still quite bad so there is most likely damage to the Haldex coupling and rear diff from when the control unit failed. They claim to not be able to tell whether it's the diff or haldex coupling (or both) that's damaged. So ultimately the only way to fix it is to replace the whole Rear Diff Assembly - approx $10,000. Does this sound right to you?

Now the car is definitely not worth fixing for that much money so my question is - where do I go from here? (bearing in mind that I spent $6,000 on fixing a major engine problem only about 6 months ago).

[Umai Naa!!]

A complete second-hand rear-end out of one of these is bound to be a hell of a lot cheaper than that.

Shouldn't be too hard to find a good one. Failure rate in the GenIV Haldex is fairly low.

[Jmac]

A complete second-hand rear-end out of one of these is bound to be a hell of a lot cheaper than that.

Shouldn't be too hard to find a good one. Failure rate in the GenIV Haldex is fairly low.

Ive done a few Haldex swaps but they were driven till they died, there is normally plenty tell tail signs and mostly due to bad controllers. I have a full diff set up in my shop left over from a good guy with a Bora, I swapped his out with a low k TT one, im sure the coupling, clutches are all good but it would need a controller. If you are keen I can ask what he wants for it?
Cheers
Jmac

[mmatear]

Hey Jmac,

Where abouts are you based? Be keen to know what it would cost for it. The dealer told me the product id I need is 0AV525010K.

Cheers