You folks know Daewoo was making cars for GM even in the late 80s. Pontiac Lemans here in the US. Really never had any real issues with those, we sold a lot of them and they were not problematic. The worst part was you just never knew what kind of horn button it might have on it, not sure why the horn buttons were such an issue, but we had them come in with Opel, Vauxhall, Chevrolet and Daewoo... then it would take 2+ weeks to get the correct one before we could put it on the lot, which kind of set off the dealer principal.
Back to the filter, be interesting to see whats inside that thing, maybe I will try to snag one out of the filter barrel next time I am by the dealer.