Originally Posted by
Spadesheart
They probably can't honestly. The Mitsubishi business structure isn't so much on the cutting edge, but based on established reliability. Engines are often retooled and updated versions of very old engines. That way they have tested reliability and can offer their industry leading warranty without issue. I'm pretty sure the engine in the Mirage was used in an older car from the early 90s. A colt maybe? I don't fully remember.
I don't know the quality of engineering of Renaults, but even if it were excellent, without their engineering design I doubt they'd have an easy time feasibly offering their warranty, as they likely couldn't build the cars to need the same minimal maintenance with historic accuracy.
I knew a guy who helped localize cars from the Fiat family when they merged with Chrysler. He told me that a lot of the localization engineering was shoddy. You can't really maintain the same quality when you don't make it in house with parts known and tested, not saying that Chrysler was particularly known for quality at the time but still hahaha.
This is only my conjecture though, could be wrong.