Like Ziggy said, I wouldn't blame Mitsubishi for this... I'd be more pissed with the dealership. You yourself have had a more positive experience with a different dealership, which emphasizes what Ziggy said. I had a problem with my '10 Ralliart with only 26,000km on it and they asked no questions whatsoever and honoured the warranty. They knew I had mods, they knew I raced, but customer service was more important to them. Since I bought the car I've gone to them for everything, oil changes too.

With all that being said, I'd 100% avoid the dealership that's trying to screw you and encourage everyone I know to avoid them. I know I'll never go there for anything... The better ones I know of are Richmond Hill and Belleville. I've had very positive experiences at both.