Hey, I'm trying to clear up some confusion. I have a Cupra 300 ST and the car is only 4 months old but as I think I'm going to keep it for a while I want to get all of the servicing requirements clear from the start. I have no issue with carrying out the servicing however the Haldex and its servicing requirements is new to me. I'm aware the service interval is 30k but I intend to carry this out every 10-15k. I'm aware of what is required for servicing the rear diff especially cleaning the filter but I cant find any consistent info on the front diff. I see some of the front wheel drive cars call for an independent front diff service separate to the gearbox. My question is do the 4drive cars require this service for the the front diff?, or is the diff open and just part of the gearbox therefore a DSG service is all that's required.
Cupra 300 ST DSG and Haldex servicing
- Thread starter Paul Bunce
- Start date
I've come from a Golf R, and did my haldex/DSG last year. I've been in the Golf R facebook page for probably 2+ years and I've never heard of anyone talking about the front diff service. I would be interested to know what the servicing requirements are, as like yourself I've only just bought my car and would like to get it right from the off! You're on the money with the 15k interval for haldex though, they're not the best for maintenance. DSG should be fine for 40k though.
It’s funny you mention that I coming stage at getting DSG service for my Cupra 300 and was going to get done at Reputable VAG independent I also mentioned diff service and he said I didn’t need it because it was FWD I hesitantly accepted what he said and that I would be in touch nearer the time But I am still none the wise my car is literally 3 years so not sure if I need a diff service or not.
Im under the assumption for FWD cars that there are two diff options; open in the gearbox and a limited slip diff which requires a separate service. Im just unclear at to what diff set up comes with 4WD cars.
Well you have the haldex filter near the rear axle, its not replaceable as such but you can take it out and clean it and replace the oil. Not sure if there is more to do in the rear dif but would like to know.
My understanding is that the Haldex coupling in the FWD cars is an external device which isn't present in the 4WD cars because that space is used for the drive to the rear wheels.
Not sure why you'd want an LSD on the front axle of a 4WD car anyway.
Not sure why you'd want an LSD on the front axle of a 4WD car anyway.
You can clean the filter, or you can replace it. I used a local VW dealer and they had to 'order the part', albeit it only cost a few pounds. While I used VW, I think a VAG specialist is the way to go because you get better service and understanding. I think a large amount of the issues with the haldex are software based too. You can clean the filter and still have traction/wheelspin problems because of a software error. I'm almost certain that mine was playing up when I sold the car, but its a very easy fix (simple reset).
From my understanding the gen 5 haldex (MQB platform) that is is used on the rear axle is also used as a front VAQ in the FWD cars. You perform the same cleaning of the filter of the haldex pump on FWD cars and oil changing. I am unaware though if it also uses the same unit in the front of 4wd cars, a second unit that is.
FWD VAQ differential service.
4WD Haldex service.
IMPORTANT QUESTION: To all of you who have done a filter cleaning, have you done the pump learn procedure with vcds after that?
FWD VAQ differential service.
4WD Haldex service.
IMPORTANT QUESTION: To all of you who have done a filter cleaning, have you done the pump learn procedure with vcds after that?
This is what I m trying to figure out, many many online DIY guides on Youtube and the net but not one says to do the learn function?! Only by VCDS i gather?
While as this specialist says it must be done. But if the learn function was done when it was new or last time it was filled with new oil, what's changed?
This is annother place to buy the parts, but no mention of learn?
Haldex Generation 5 Oil Service Kit
Specialist in performance parts for the VW Audi Seat Skoda Group cars. Interest free finance available on all car tuning parts and we have our fully equipped specialist workshop in Manchester.
www.awesomegti.com
some info including front diffs
Haldex Servicing - Why and When?
In this blog, we will attempt to help readers better understand the VAG Haldex systems and their service requirements.
www.awesomegti.com
The specialist I normally use isnt' keen to do it, says everything he goes by says the Gen 5 is sealed for life!
For sure after seeing all the photos around the web, the haldex oil needs change as well cleaning of the pump mesh grill, and of course new o-rings and bolts while cleaning the pump. So either tell him to look the photos and change his mind, or change the "specialist" you are using. When the grill of the pump gets cloaked the pump itself adapts to this situation and will keep working like that if you don't do the vcds learn procedure. I will do the learn procedure when I clean the pump and change the haldex oil, o-rings and bolts.
I agree. So the pump adapts one way and not the other...a design fault
Learn procedure is VCDS only? Quite capable of doing this myself otherwise and knowing it would be done properly.
Had to chicken out of a fuel filter change because of the fear of an airlock with VCDS. I am considering getting VCDS! There was a member about an hour away with it but not longer active.
I have a few specialists round my way and they vary so much to their knowledge.
I don't know if someone can consider it a design fault. It gets to the state of less flow, if we can call it like so, gradually. So it adapts to this situation. It can't be sure that after cleaning, it is now in perfect working condition to revert to the previous state, so someone has to tell the ecu that it now is by the learning procedure. Same thing I guess as the battery change where you have to "inform" the car through vcds that a new battery is on and should charge it as so and not as it used to charge the old one.
As was said above, not a design fault; it only learns one way to prevent a catastrophic failure.
Does the 7 speed wet clutch DSG (DQ381 I think) have its oil change due at 40k? I'm sure I read on this forum some time ago that it wasn't required until 80k on that particular box.
Sorry to drag this thread up again but I've just had a conversation with my local dealer and I'm confused. My car is three years old with 16k miles , ST 4drive.
They said that the haldex oil includes cleaning of the 'strainer' is this the filter that is mentioned on the pump? Are there different versions of the pump which have different filters, replaceable vs non replaceable?
They also said the dsg doesn't need servicing until 80k miles and there is no age requirement on these, I thought it was 40k miles or 4 years or is this for the older 6 speed dsg.
If someone could clarify things it would help a lot. It's impossible to find service interval information specific for the vehicle now that the service records are all online.... I'm sure the dealer is probably right but I want to absolutely check so I've had everything done at the right times and to the right standard... Its also to ensure I can go to the all in plan once its ticked over the 3 years... Anyways thanks in advance...
They said that the haldex oil includes cleaning of the 'strainer' is this the filter that is mentioned on the pump? Are there different versions of the pump which have different filters, replaceable vs non replaceable?
They also said the dsg doesn't need servicing until 80k miles and there is no age requirement on these, I thought it was 40k miles or 4 years or is this for the older 6 speed dsg.
If someone could clarify things it would help a lot. It's impossible to find service interval information specific for the vehicle now that the service records are all online.... I'm sure the dealer is probably right but I want to absolutely check so I've had everything done at the right times and to the right standard... Its also to ensure I can go to the all in plan once its ticked over the 3 years... Anyways thanks in advance...
The Haldex oil change is due every 3 years and the DSG 7 Spd box every 80,000 miles (although or 4 years, whichever comes first is often quoted, albeit the 7 Spd DSGs didn’t start appearing until Sep 2018 - was in Mk7.5 Golf R Estate before this, so one of the VW forums may be able to confirm).
As above, the main dealer will change the oil only, not clean the strainer (on Haldex 5), which is why most of us get this task done at a VAG specialist. My specialist states that c.20,000 interval is required for a car that is driven hard. If the dealer is stating that they clean the strainer, get them to put is in writing and request that they take a photograph of the strainer before/after. Most of the dealers video their health checks, so this shouldn’t be an impossible task for them to complete.
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