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2018 Golf GTI Autobahn | 1993 VW Corrado SLC
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Discussion Starter · #1 · (Edited)
I believe the factory recommended service interval for a fluid/filter change is 4 yrs/40K, but is there a view in the community to switch to more frequent changes, to keep an old Haldex unit alive? Mine's a very low mileage ((40K) Roadster and I did the service last year when I acquired it. I continue to put on miles very slowly…
 

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I believe the factory recommended service interval for a fluid/filter change is 4 yrs/40K, but is there a view in the community to switch to more frequent changes, to keep an old Haldex unit alive? Mines a very low mileage ((40K) Roadster and I did the service last year when I acquired it. I continue to put on miles very slowly…
Unless you plan to track/autocross the car or mod the Haldex, there generally isn't a need to service the coupling more often than every 40k. The Haldex itself is actually a very stout piece of engineering; very rarely do the internals suffer failures related to fluid changes or under regular driving. Most cases of failed clutches are from people locking the Haldex in 50/50 with a physical mod or from track abuse.

The more frequent failure point is the controller (which can't really be saved from failure with more fluid changes; if it happens it happens). The internal seals can leak and cause fluid ingress. Otherwise you should be safe, especially on such a low-mileage car.

Sent from my IN2025 using Tapatalk
 

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Like brake fluid, the Haldex fluid is anhydrous which is why Audi recommends it be changed on both a time or mileage basis due to water absorption by the fluid.
 
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2018 Golf GTI Autobahn | 1993 VW Corrado SLC
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Discussion Starter · #4 ·
Appreciate the replies; a local German car independent mechanic had tried to sell me on the idea that doing it on an annual basis was good preventative maintenance; while I'm sure it wouldn't hurt, that's more effort than I'm inclined to invest annually, especially as little as I drive it.
 
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