Vehicle Data Hub

1999 Mitsubishi Diamante problems

NHTSA has received 26 complaints about the 1999 Mitsubishi Diamante, and 42% of them involve wipers, windshield & visibility. After that come air conditioning & heating (31%) and brakes (12%).

At a glance

Complaints
26 filed with NHTSA
Most reported
Wipers, windshield & visibility 42% of complaints
Crashes and fires
0 and 0
Injuries and deaths
0 and 0
Typical mileage
88,000 miles 14 complaints with mileage

Source: NHTSA owner complaints

Where the complaints are

Share of this model year's complaints by the part of the car involved. One complaint can name more than one part, so the shares can add up to more than 100%.

  • Wipers, windshield & visibility 42%
  • Air conditioning & heating 31%
  • Brakes 12%
  • Suspension 12%
  • Cooling system 8%
  • Engine 4%
  • Fuel system 4%
  • Seat belts 4%
  • Seats 4%
  • Steering 4%

When problems show up

Complaints by mileage, 1999 Mitsubishi Diamante Complaints by odometer reading in 20,000-mile steps. The median is about 88,000 miles. 0k to 20k miles: 0 complaints 20k to 40k miles: 0 complaints 40k to 60k miles: 2 complaints 60k to 80k miles: 3 complaints 80k to 100k miles: 3 complaints 100k to 120k miles: 1 complaints 120k to 140k miles: 0 complaints 140k to 160k miles: 1 complaints 160k to 180k miles: 0 complaints 180k to 200k miles: 0 complaints 200k+ miles: 4 complaints 040k80k120k160k200k miles Typical: 88,000 miles
Based on 14 complaints that include mileage. 14% were reported before 60,000 miles. The amber marker shows the median: half of these complaints happened before that mileage.
View the numbers
MileageComplaints
0k to 20k miles0
20k to 40k miles0
40k to 60k miles2
60k to 80k miles3
80k to 100k miles3
100k to 120k miles1
120k to 140k miles0
140k to 160k miles1
160k to 180k miles0
180k to 200k miles0
200k+ miles4

What the data shows

Among the 14 complaints that report mileage, the typical (median) problem appeared at about 88,000 miles.

None of these complaints report a crash, fire, injury or death. Its complaints are less severe on average than those of 100% of model years in our database.

Looking only at complaints filed within five years of the model year (so older and newer years are comparable), the 1999 ranks 10th most-complained-about out of 10 model years of the Mitsubishi Diamante with enough data (11 complaints in that window). It is also covered by 2 safety recall campaigns.

What owners wrote

A few complaints as filed, shortened and with personal details removed. The first ones are among the most serious reports for this model year; the rest are typical.

Pulls to the right when accerating at highway speeds. From 2000 miles -4000 pulled to right at all speeds. Now only highway.mitsubishi claims this pulling is " normal torque steer". ( so was the ford pinto's gas tank problems) if you are not prepared for the pull you will go off the road or into the next lane.I am always compensating and the degree of pull changes with the amount of acceleration. Unpredictable and dangerous . Please call me for further details as to mitsubishi's response to this.

September 1999

Rotors warped at 14444 miles, dealer turned them under warranty. They got warped again at 18700 mile, but dealer refused to address the issue, citing driver's driving habits.

September 2000

The complaint is that the car doesn't have the rear seat head conforters. The car and the dealer have been promissing a supposed replacements that they ordered. I have been waiting for this promise since january 2002. Dt

I'm experiencing a syrupy smell inside the car when the heat is on. Per the various research I have performed, this is a sign of a failing heater core. This is a known failure by mits per TSB 627114 that was issued. Additionally, on >2000 model year diamantes, mits began putting the vehicle?s computer (ECU) in a plastic bag so that when the heater core does fail, it does not ruin the ECU and create additional safety risks.

Reported at 78,000 miles, March 2005

The windows fog up so bad that it becomes hard to see. The vents spew out the pungent smell of anti-freeze. I have noticed on more than a few occasions that puffs of vapor shoot out from under the passenger side dash and vents. I know that anti-freeze is poisonous to humans and don't think that its safe for me to be driving the vehicle when I have to breath in the vapors.

Reported at 60,000 miles, March 2006

Other model years of the Diamante

Best and worst years for the Mitsubishi Diamante