Nothing at all.
My previous model was a 1991 30R SE model which was fully loaded with all the bells and whistles and never gave me any problems, and the newer model seems to be just as reliable and just as quick as the 3L model.
At around 90,000 miles, the "Valve Stem Seals" on all Mitsbishi Diamantes go out. It's a good $1,000 repair job, trust me, I just had one done!
This is a GREAT car, huge value for money, I just bought one and love it, won't swap it for the newer models, my 1995 SE is mean machine. :)
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