How do you know it works? If it is indeed a cut corner that has a negative impact, it wouldn't present itself immediately or in all cases. I couldn't even begin to guess.

That doesn't apply to automotive. Many, many things that work in the factory will fail miles down the road. We don't know the design criteria for this and whether they were verified for the replacement. Maybe it needed to be free of a specific chemical or have specific properties within a temperature range and the supply chain can't guarantee that in the replacement.

Sure, it's more likely than not that the fix was signed off on and totally acceptable, but the story doesn't have enough information to be certain of that.