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hmm...
think I'd be tempted to break out the dremel!
It's frustrating, but not surprising. On some of the older Volvo cars that had a serviceable filter, the Haldex was oriented in a way that you had to drop the driveshaft just to access the filter! The pump is also blocked in those applications. Clearly the manufacturer doesn't view this as a service item.
There's not much rhyme or reason as to how much debris you'll have on the pump screen, but my own thought is that if you do a lot of parallel parking or 3 point turns and you're going full-lock a lot at low speed, you'll likely be activating the pump more often. I drove around w/a scan tool for a while observing pressure outputs, and believe it or not that seems to be the highest usage scenario.
In lieu of grinding the diff to remove the pump, I think just doing the fluid changes a bit more often would likely do the trick. Can't see myself removing the Haldex unit unless I have to replace or rebuilt the pump.
Thanks for the update!
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