I'm stubborn. I'll always go aftermarket and just swap out until I get one that works. Being an extra car right now, helps. I can let it sit until I want to replace the defective part. I think the 1.8T coolant flange was the only thing I bought OEM on the engine besides plugs or coil packs. Did NOT want to do that again any time soon.That's exactly why I spend the extra money on Genuine.
I know others here have used aftermarket with success but my luck has run against me.