2003 Mitsubishi DiamanteMitsubishi Diamante 2003

Vehicle Details: Recalls, Fuel Economy, Emissions, Consumer Complaints, Decoded VIN Details, Service Bulletins

Mitsubishi Logo

Below you will find all available information on the 2003 Mitsubishi Diamante, manufacturered by Mitsubishi Motors Australia Ltd..
The vehicle is described as a Front-Wheel Drive Midsize Cars 4-door sedan, hardtop.

ManufacturerKnown WMI(s)Fuel Type
Mitsubishi6MM JA3 JA4 JA7 Premium
City MPGHighway MPGCO2 emissions
16 MPG23 MPG493.72 g/mile
Mitsubishi VIN Decoder

Use the box here to look up VINs from Mitsubishi as well as other manufacturers

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Sub-models: - Diamante Sedan -

Frequently Asked Questions
  • What is the MPG of a 2003 Mitsubishi Diamante?
     - The 2003 Mitsubishi Diamante has an EPA estimated city efficiency of 16 MPG and an estimated highway efficiency of 23 MPG.
  • What is the fuse box diagram for the 2003 Mitsubishi Diamante?
     - Fuse box diagrams for the 2003 Mitsubishi Diamante can be found here
  • What is the annual fuel cost for the 2003 Mitsubishi Diamante?
     - EPA estimated annual fuel cost for the 2003 Mitsubishi Diamante is $3700.
  • Where is the 2003 Mitsubishi Diamante produced?
     - The 2003 Mitsubishi Diamante is produced in Tonsley Park South Australia, Australia.
  • Are there recalls for the 2003 Mitsubishi Diamante?
     - There are 2 recall(s) for the 2003 Mitsubishi Diamante, additional information is below.
NHTSA Mandated Recalls
  • Recall 41307 [USA]: This does not meet the requirements of the standard.

  • Recall 34821 [USA]: If the tether strap is improperly installed to the tether anchor, the child safety seat may not be sufficient restrained. in the event of a crash, the child could be injured.

To ensure accuracy and for your safety, it is recommended to do a free VIN recall check here or here [USA] - UK - Canada.

NHTSA Submitted Mechanical & Emissions Details
  • Automatic 4-spd Front-Wheel Drive Diamante Sedan

    Description Data
    Engine cylinders6
    Engine displacement in liters3.5
    Engine descriptor; see fueleconomy.gov detailsSOHC
    TransmissionAutomatic 4-spd
    You save/spend over 5 years compared to an average car ($). savings are positive; a greater amount spent yields a negative number. for dual fuel vehicles, this is the cost savings for gasoline-8750
    Transmission descriptor; for information see the fueleconomy.gov detailsCMODE CLKUP
    Description Data
    Annual petroleum consumption in barrels for fuel type 116.5283
    City mpg for fuel type 1,16
    Combined mpg for fuel type 1,18
    Engine cylinders6
    Engine displacement in liters3.5
    Drive axle typeFront-Wheel Drive
    Engine descriptor; see fueleconomy.gov detailsSOHC
    Annual fuel cost for fuel type 1 ($)3700
    Fuel type with fuel type 1 and fuel type 2 (if applicable)Premium
    Fuel type 1. for single fuel vehicles, this will be the only fuel. for dual fuel vehicles, this will be the conventional fuel.Premium Gasoline
    Highway mpg for fuel type 1,23
    Vehicle record id18690
    4 door luggage volume (cubic feet)14
    Model name (carline)Diamante Sedan
    Has my mpg data; see yourmpgvehicle and yourmpgdrivervehicleN
    If true, this vehicle operates on a blend of gasoline and electricity in charge depleting modefalse
    4-door passenger volume (cubic feet)96
    TransmissionAutomatic 4-spd
    Unadjusted city mpg for fuel type 119.4
    Unadjusted highway mpg for fuel type 132.1
    EPA vehicle size classMidsize Cars
    You save/spend over 5 years compared to an average car ($). savings are positive; a greater amount spent yields a negative number. for dual fuel vehicles, this is the cost savings for gasoline-8750
    Transmission descriptor; for information see the fueleconomy.gov detailsCMODE CLKUP
    Date the vehicle record was created (iso 8601 format)Tue Jan 01 00:00:00 EST 2013
    Date the vehicle record was last modified (iso 8601 format)Tue Jan 01 00:00:00 EST 2013
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • DEALER LETTER - EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL: This is a dealer letter sent to dealers informing that mitsubishi technical training has launched the 3rd quarterly technician quiz for 2023.
  • TSB-23-00-004 - STRUCTURE: This technical service bulletin provides instructions and material safety data sheets for removal of rap-film adhesive residue.
  • TSB-23-00-001 - EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL: This technical service bulletin reviews the regulations that require a label showing the reduction in load carrying capacity be affixed to vehicles when the total net weight of accessories is more than 1.5 percent of the vehicle's gross veh
  • DEALER LETTER - EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL: This is a dealer letter sent to dealers informing that mitsubishi technical training has launched the 2nd quarterly technician quiz for 2023.
  • TSB-22-54-003 - EXTERIOR LIGHTING: This technical service bulletin was sent to dealers to explain the difference between normal dew condensation, which is a natural phenomenon, and water penetration caused by improper sealing or a defective/broken part.
  • TSB-13-42A-002 - STRUCTURE: This technical service bulletin updates the door adjustment procedure in the body section of the applicable service manuals.
  • TT194 - STEERING: This is a service newsletter (tech talk) that was sent out to dealers.
  • TTIndex12 - EQUIPMENT: This is an index of tech talk newsletter articles released in 2012.
  • TT193 - STRUCTURE: This is a service newsletter (tech talk) that was sent out to dealers.
  • TT195 - POWER TRAIN: This is a service newsletter (tech talk) that was sent out to dealers.
  • TT192 - VISIBILITY: This is a service newsletter (tech talk) that was sent out to dealers.
  • TT191 - SERVICE BRAKES, HYDRAULIC: This is a service newsletter (tech talk) that was sent out to dealers.
  • TT218 - ENGINE AND ENGINE COOLING: This is a service newsletter (tech talk) that was sent out to dealers.
  • TT217 - POWER TRAIN: This is a service newsletter (tech talk) that was sent out to dealers.
  • TSB-15-54-004 - EQUIPMENT: This tsb contains troubleshooting steps for diagnosis of various customer complaints relating to the audio system speakers in mitsubishi vehicles equipped with original equipment audio components.
  • TT253 - EQUIPMENT: This is a service newsletter (tech talk) that was sent out to dealers.
  • TSB-19-00-008 - EQUIPMENT: This is a technical service bulletin sent to dealers. This bulletin supersedes tsb-18-00-003, issued april, 2018, to add updated information for carrying capacity reduced label.
  • TT237 - EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL : This is a service newsletter (tech talk) that was sent out to dealers.
  • MEDICUpdate517 - EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL : This is a message sent to dealers, to inform them that an update for medic will be available.
  • 0654002 - EXTERIOR LIGHTING:BACK UP LIGHTS: Loose center high mount stop lamp. *tt
  • 0627001 - SUSPENSION:REAR: Rear axle knuckle assembly bushing replacement - service manual revision. *tt
  • 0523004 - POWER TRAIN:AUTOMATIC TRANSMISSION: 2-3 shift flare. *tt
  • 0317006 - VEHICLE SPEED CONTROL:CRUISE CONTROL: Test specifications for the cruise control vacuum pump are incorrectly printed in the affected service manuals. *ph
  • 0336001 - PARKING BRAKE: Revised parking brake adjustment specifications - service manual revision. *tt
  • 93 - POWER TRAIN:AXLE ASSEMBLY: Vibration increasing with speed. *tt
  • 93 - POWER TRAIN:AXLE ASSEMBLY: Vibration increasing with speed. *tt
  • 0354007 - ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:CONTROL MODULE: Immobilizer system information update (2003 models). *tt
Keyfob Information

The following is a list of any known keyfobs for the Mitsubishi Diamante 2003 as well as their FCC IDs if available

  • ILCO-AX00013590: 2000-2003 Mitsubishi Diamante / 4-Button Keyless Entry Remote / PN: MR587979 / OUCG8D-522M-A (AFTERMARKET)
    FCC ID: OUCG8D-525M-A
NHTSA decoded information from VIN

138 Results returned successfully. NOTE: Any missing decoded values should be interpreted as NHTSA does not have data on the specific variable. Missing value should NOT be interpreted as an indication that a feature or technology is unavailable for a vehicle.

Variable Value
Air Bag Loc Front1st Row (Driver and Passenger)
Body ClassSedan/Saloon
DisplacementCC3500.00
DisplacementCI213.583104331562
DisplacementL3.50
Doors4
Engine ConfigurationV-Shaped
Engine Cylinders6
Engine Model6G74
Error Text0 - VIN decoded clean. Check Digit (9th position) is correct
Fuel Injection TypeMultipoint Fuel Injection (MPFI)
Fuel Type PrimaryGasoline
MakeMITSUBISHI
MakeID481
ManufacturerMITSUBISHI MOTORS AUSTRALIA LTD.
Manufacturer Id13526
ModelDiamante
ModelID5425
Model Year2003
NCSA Body Type4-door sedan, hardtop
NCSA MakeMitsubishi
NCSA ModelDiamante
NoteBody Type: Pillared Hardtop
Plant CityTONSLEY PARK
Plant CountryAUSTRALIA
SeriesYR42
Series2SPECIAL
TrimX
VIN6MMAP67P03T010882
Valve Train DesignSingle Overhead Cam (SOHC)
Vehicle TypePASSENGER CAR
Most Recent Consumer Complaints and Accidents
CrashFireTowedInjuredDeathsFailure
Date
NoNoN NoneNone20110630

Tl* the contact owns a 2003 mitsubishi diamante. The contact stated that the heater core fluid leaked onto the central computer and caused the transmission to fail. In addition, the gear shifter could not be released from third gear. The vehicle was not taken to the dealer. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure and current mileage was 164,000. The vin was not available.

NoNoN NoneNone20110524

I have a 2003 mitsubishi diamante ls with 71677 miles on it all of the sudden my husband (the primary driver) tells me that every time he gets out of the car he feels light headed and nauseous. Days later the front windshield started fogging up while driving and after turning the car off (whether it is warm or cold outside) i googled why would this happen and have spoken with a few mechanics and they are telling me that it is the heater core going out, and that the reason why my husband is getting light headed and nauseous is because there is anti-freeze coming into the interior of the car which is very detrimental to your health. I have read a ton of complaints on different websites and they all say the same thing. I contacted mitsubishi corporate today and spoke with a [xxx] in customer service and explained to her what was going on and asked why mitsubishi has not done anything about this. First because of the health implications, secondly because of the safety issue of the windshield fogging up while you're driving to where you can't see and thirdly that from reading the complaints, the heater core is right above the computer in the car so if the heater core is leaking antifreeze, it could fry the computer and cause a possible crash if the car were to stop suddenly. She said that "seeing that i hadn't had the car into a dealership in the last year that there is nothing they can do about it". I told her that it just started and what was i suppose to do, look into my crystal ball and know a year ahead of time that the heater core was going to go out. This is ludicrous! ! ! Mitsubishi knows that this is a serious issue and are not doing one thing to fix it (by issuing a recall) where do we diamante owners go to get some help? Do we need to file a class action lawsuit as that seems like the only way a fire is going to get lit under them (corporations tend to act if it means losing tons of money) the car can't be driven and i'm still paying on it. Help! Information redacted pursuant to the freedo

NoNoN NoneNone20110131

Tl* the contact owns a 2003 mitsubishi diamante. The contact stated the vehicle was consuming excessive amounts of fuel and she was concerned the vehicle would prematurely run out of fuel while driving. The vehicle was taken to an independent repair shop where the contact was told that the intake air temperature sensor would need to be replaced. The vehicle was not repaired. The failure mileage was 60,000 and the current mileage was 70,000.

NoNoN NoneNone20100410

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. *lj

NoNoN NoneNone20100318

Information redacted pursuant to the freedom of information act (foia), 5 u.S.C. 552(b)(6). This concerns my 2003 mitsubishi diamante. It has less than 50,000 miles on it and it has suddenly started spewing a light film on the inside of my front windshield so that i cannot see well...And not at all when i am headed into the sun. I have checked on the internet and a lot of people are having the same problem with mitsubishi diamantes going back several model years. All diamantes need to be recalled and the heater core and/or its o rings fixed or replaced. If this doesn't happen, people will die when they suddenly cannot see the road through their front windshield. [xxx] *tr *dt

NoNoN NoneNone20091231

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. *tr

NoNoN NoneNone20091103

Anti-freeze leak on carpet passenger side near firewall fogged up windows check engine light comes on and off due to the leak the ecu started working awful. *tr

NoNoN NoneNone20081031

Tl- the contact owns a 2003 mitsubishi diamante. The contact stated that the neutral light on the vehicle started flashing on and off and he noticed a smell of coolant. He noticed that the coolant was leaking onto the floorboard of the vehicle. The failure progresses until the vehicle will not start. The vehicle was taken to a dealer and the owner was advised the failure was the a.T. Control relay. Code p-1751. The failure has not been repaired. The current and failure mileage is approximately 60,000. Rd

NoNoN NoneNone20080930

Heater core leakage causing smoke and antifreeze odor to come out of car vents and underneath dash board (passenger side). There is a risk of accident, personal injury, or death because use of a/c, heater, and defrost is not available when windshields and windows fog up. *tr

Read and Submit Vehicle Complaints -- 52+ complaints filed
Common OBD-II Error Codes
  • P1751 [1] Line Pressure Solenoid System
Latest VINs Decoded for this Manufacturer
VIN Year Model Manufactured In
6MMAP87P73T0069852003DiamanteTONSLEY PARK , AUSTRALIA
6MMAP67P03T0108822003DiamanteTONSLEY PARK , AUSTRALIA
6MMAP67P33T0067622003DiamanteTONSLEY PARK , AUSTRALIA

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