Introduction

If your MQB vehicle is equipped with a Haldex final drive, such as the MK7 Golf R or 8V Audi S3, servicing of the filter screen and oil is crucial to prolong the pump lifespan. The recommended service intervals are seemingly too far apart, and customers are finding that their filters can get blocked within half that timeframe. We recommend this service is carried out every 30,000 KM or less depending on your driving style.

Please note that the final drive is filled with both ‘gear oil’ in the differential and ‘Haldex oil’ in the Haldex (clutch) system – We will be addressing the Haldex clutch in this tutorial.

Difficulty Rating

Moderate

Tools/Parts Required

Step 1

Locate the fill and drain plugs on the Haldex case. Loosen the fill plug first to ensure it is not seized in place.

Step 2

Loosen the drain bolt and drain the oil.

Step 3

Remove the two bolts securing the Haldex pump.

Step 4

Gently wiggle the pump free and let the oil drain out.

Step 5

With some gentle manoeuvring you will be able to slide the entire pump out of the housing with no need to disconnect any electrical connectors. Be mindful not to strain the wiring loom.

You can now see the dirty filter screen. This was ours after 20,000km.

Step 6

Clean the filter screen. Optionally you may choose to remove the screen entirely and spray it with parts cleaner. This can be done by removing the two screws as shown.

Step 7

Often skipped, don’t forget to clean the inside of the pump housing as well. It tends to collect an equal amount of sludge.

Step 8

Change the two rubber o-rings included in the service kit.

Step 9

Re-install the pump, tighten bolts to 9.5 ± 0.5 Nm

Step 10

Re-install the drain bolt and tighten to 30Nm

Step 11

Fill the Haldex with oil until it begins to overflow out the fill hole, then install the fill bolt and tighten to 15 Nm.

Your Haldex service is now complete.

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