I purchased my 2000 Mitsubishi Diamante in Dec. 2003. I did a lot of online research before purchasing and found that most of the people complain about its fast depreciation, but praise reliability of the car. I was looking for a good used car, so fast depreciation was a good news. Why pay $36,000 for a new, when you can get a great used car for $12,000? So, I found a Diamante with 55,000 miles online and drove it home. For two years that I owned this car I just did regular maitainance (oil, transmission fluid, brakes, put new set of tires). I had no problem with transmission, it shifts perfectly. I didn't have any problems with the heat-core either. I spent only $480 in maintainance to keep this car in excellent shape for two years.
I bought this car new and have only had reliability. I have only done routine maintenance. Never broken down or replaced parts other than brakes, tires, and muffler. I have over 155,000 miles. It still rides it did new. Great riding comfort and pickup. I get about 27 miles highway and 24 around town. If they were still made I would buy another!
An amazing car, all around. I actually bought this because i loved my '93 diamante so much. interior quality + performance is top notch. only problem is that it can be slightly non-responsive from a stop (not a big deal). Exterior is sleek;the first time i saw it i was reminded of a BMW. B+/A- in my book. wish they still made these.
I have had nothing but problems with my 2000 Mitsubishi Diamante. The last one is the famous heater core leakage problem. Just google for "Diamante heatercore" and you will see It is a known problem and Mitsubishi knows about it but is not doing anything. This problem costs $700 - $900 to repair or you will be poisoned inhaling antifreeze. Also, the 60,000 mile service costs $1,500 for a car not worth even $9,000. I will never purchase a Mitsuibishi again.
Love the car but hate to see it losing value. OEM parts are ridiculously expensive and aftermarkets are hard to come by. Gas mileage is not all that great (20- 22 MPG) and heater core problem is starting to surface. I would recommend this car if you can find an exceptional deal .