2003 Mitsubishi Diamante Visibility (wipers, defrost, mirrors) Problems
- Complaints
- 28about this part
- Share
- 50%of 56 total for the year
- Median mileage
- 60,000miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 28 complaints about the visibility of the 2003 Mitsubishi Diamante, 50% of the 56 complaints for this model year. Where a mileage was given, the median is 60,000 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I have 2003 Mitsubishi Diamante. My check engine light came on, so I took it in for service, and my heater core was leaking on my computer...now it's going to cost me around 3,500 dollars....this is a very flawed design. There should be a recall on this item.”
NHTSA complaint #10223524, filed 2008-04, 20 miles“The car only has 63,000 miles. An antifreeze odor was noticed initially and began to intensify with time. When the defroster is running the windshield will fog up and the anti-freeze smell is so intense that it nauseates my wife and kids. I have also noticed that the carpet on the passenger side is damp. It appears that this is a very common problem with the Diamante due to a failure with the heater core and its connections.”
NHTSA complaint #10183423, filed 2007-02, 62,500 miles“I have a 2003 Mitsubishi Diamante with 60,000 plus miles. For the past several months I have noticed a strong smell of anti-freeze coming from the vents and the windows constantly fogging up, sometimes to the point that I cannot see to drive. I have read many similar complaints and agree with others that Mitsubishi needs to issue a recall for the heater core, as I am sure this is the problem. I have yet to take mine in to get it repaired, so I don't have a cost quote at this time.”
NHTSA complaint #10318872, filed 2010-03, 62,000 miles“This is a Mitsubishi Diamante 2003 es. I'm experiencing a sweet smell of anti-freeze inside the car as soon as I turn on heating. Anti-freeze contains ethylene glycon and the fumes are highly toxic. Fixing the heater core will cost $1300. …”
NHTSA complaint #10211220, filed 2007-12, 86,000 miles“Car smells like coolant. Windows won't clear up while im driving. Very foggy. It happened when the heaterwas needed. The odor was making me nauseous and sick. Dealer said I needed a new heater core at 20,000 miles.”
NHTSA complaint #10186110, filed 2007-03, 20,000 milesRelated service bulletins
- 10170074Aug 28, 2015This is a service newsletter (Tech Talk) that was sent out to dealers.
- 10170087Dec 7, 2012This is a service newsletter (Tech Talk) that was sent out to dealers.
Visibility (wipers, defrost, mirrors): other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2003 | 28 | 50% |
| 2002 | 71 | 58% |
| 2001 | 56 | 72% |
| 2000 | 27 | 53% |
| 1999 | 11 | 48% |
| 1998 | 16 | 59% |
| 1997 | 3 | 9% |
| 1993 | 1 | 3% |
| 1992 | 4 | 10% |
Other parts of the 2003 Mitsubishi Diamante
17 complaintsBrakes
5 complaintsTransmission and drivetrain
4 complaintsEquipment
3 complaintsSuspension
3 complaintsTires
3 complaintsElectrical system
2 complaintsFuel system
2 complaintsAir bags
1 complaintsExterior lighting
1 complaintsLatches, locks and linkages
1 complaintsSeats
1 complaints
← All problems reported for the 2003 Mitsubishi Diamante
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology