2003 Mitsubishi Diamante: engine overheating

5 of the 56 complaints about the 2003 Mitsubishi Diamante describe engine overheating.

owner complaints: 5
of this car's complaints: 9%
typical mileage: 60,000
recalls: 0

Is there a fix? 1 service bulletin covers this area of the car. See below

Engine overheating by model year

2003
5
2002
11
2001
6
2000
1
1999
1
1998
2
1993
1

What owners say

Filed May 20, 2010 · Engine · 60,000 miles · OH

Tl* the contact owns a 2003 mitsubishi diamante. The contact stated he noticed an unusual odor of coolant and the neutral indicator began sporadically illuminating. Upon further inspection, the contact found coolant leaking onto the floorboard. In addition, the vehicle would intermittently fail to start. The dealer performed a diagnostic test and determined the failure was caused by the a.t. Control relay and produced code p1751. The vehicle was not repaired and the VIN was not available. The failure and current mileages were approximately 60,000. Updated 10/27/10.

Filed Dec 19, 2007 · Visibility · 37,813 miles · CA

37813 miles. Heater core leaking. Notice the sweet smell and now overheating occurs.

Filed Jul 10, 2007 · Engine · 42,900 miles · OK

Maple syrup smell from air vents then car started to overheat heatercore failure, antifreeze in floorboards on windshield and coming through air vents. A new heatercore installed very costly had to do work myself because warranty expired. Had to shampoo carpets and buy new floormats because the anitfreeze ruined them. After reading many complaints you would think that a recall would be made. Just because no deaths the consumer should suffer. What about the money that it took to make the repair. That was money taken from my family that we use to feed us and have shelter. Come on you have to authority to do something so why don't you.

Filed Mar 31, 2007 · Engine, Visibility · 60,000 miles · CA

2003 mitsubishi diamante coolant leak inside the car. Steam fogging the windows and strong chemical odor leaving residue on windows. Quoted $1000 to repair, they say it needs a new heater core. It may not be the heater core, but just seals. I have bypassed the heater hoses and fortunately live in a warm area.

Filed Aug 16, 2006 · Visibility · 61,145 miles · WA

Make : mitsubishi model : diamante ls year: 2003 just purchased car from dealer stating car in excellent mechanical condition. Upon delivery of car from transporter, got in the car knew immediately there was film on window and could smell coolant in the air. Turned car on, strong smell of coolant coming through vents with coolant leaking onto passenger floor. Texas auto group, the seller, refused to accept responsibility despite representing car in excellent mechanical condition. Took to a mitsubishi repair service and had to have heater core replaced at a cost of $1167.92. This repair service 40 miles away and it took 7 days to complete. Had to have carpet and car detailed to get rid of coolant smell. Researched on internet and found out this is a problem that has been going on since 1998 with these heater cores with mitsubishi very much aware of it, and obviously nothing has been done to change this problem. This car only has 61145 miles on it and there is no excuse for this irresponsibility or costs to the consumers of these cars,including property damage as well as health risks to the consumers as coolant is toxic to breath. Mitsubishi should be forced to do a recall and reimburse their customers as they have know of this problem and have done nothing about it. Upon researching more, have found that some folks have had to have it repaired more than once. There is now starting to show complaints of the 2003 models. Very unhappy consumer and feel taken advantage of and have now paid more for this car then it is worth. Hope this will help another unsuspecting customer of the mitsubishi diamantes.