Ik heb contact gehad met Powerflex via de mail
Dit was hun antwoord:

Hi Richard,

We had a very small number of incidents as a percentage with this part but we found it mainly to do with some vehicles being extremely low.

When we started to look into this we did find that we could produce an evolution of the bush, with the same performance and reliability but with a lower production cost and hence why we produced another bush.

I would recommend using this parts as long as the car is not lowered to heavily and the bush fits correctly in the hole of the arm

Kind Regards

James Bourn ~ Sales Manager

Het probleem is dus dat de draagarmrubbers (de ronde) het niet uithouden bij een erg verlaagde Corrado (dus ook Golf 2).
Ik hoop dus nieuwe te krijgen, of in het ergste geval 2 nieuwe bestellen.
Dus even het antwoord afwachten...

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If your car doesn't scrape it's not low enough!

Corrado -Edition 3.2- project car
New Beetle 1.6
Passat variant 1.8 20vt