2003 Mitsubishi Diamante Sedan Review | Edmunds.com

2003 Mitsubishi Diamante Sedan


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Mitsubishi Diamante Features and Specs

Features & Specs

  • Engine 3.5 L V 6-cylinder
  • Drivetrain Front Wheel Drive
  • Transmission 4-speed Automatic
  • Horse Power 205 hp @ 5000 rpm
  • Fuel Economy 16/23 mpg
  • Bluetooth No
  • Navigation No
  • Heated Seats No

Review of the 2003 Mitsubishi Diamante

  • Although the VR-X version is a step in the right direction, the Diamante is a diamond best left in the rough.

  • Safety
  • Pros

    Long list of standard features, confident brakes, capable handling (in VR-X) and quiet ride.

  • Cons

    Transmission easy to confuse, some subpar interior materials, ergonomic flaws.

  • What's New for 2003

    After introducing the sporty VR-X trim level halfway through 2002, the Diamante continues into 2003 with no changes.

What Others Are Saying

Customer Reviews

  Average Consumer Rating (42 total reviews)

2 of 2 people found this review helpful

Sweet ride

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Vehicle: 2003 Mitsubishi Diamante ES 4dr Sedan (3.5L 6cyl 4A)

Purchased with 79k miles for $7k. Same yr Avalon $15k. Added Bosch Platinum 4 plugs and it changed this car immediately. Has plenty of go, we now average 27 mph hwy on regular gas and Valvoline hi-mileage synthetic oil. Never a problem, looks and positive comments from others. Very comfy on a + 6hr ride in front and back. Leather is sweet and sound system is great. Best buy for the money.

Diamante ls

by on
Vehicle: 2003 Mitsubishi Diamante LS 4dr Sedan (3.5L 6cyl 4A)

This car has been a blessing for me! Cold A/C and very comfortable to sit in! Just have a few complaints. Fuel economy is terrible, especially in the city, and showing signs of rust and paint is starting to peel on the hood! All and all this car's performance is awesome. Transmission doesn't seem to shift at the right time especially when you punch it right off the line! Using Full Synthetic Motor Oil has increased horsepower greatly and be sure to run only premium fuel in these cars to help get the most out of your gas tank!

My v-rx rocks

by on
Vehicle: 2003 Mitsubishi Diamante VR-X 4dr Sedan (3.5L 6cyl 4A)

I have 137K on mine and all I've had to replace is brakes and tires. (Bridgestone Insignia s-200's are a great replacement for the Goodyears it came with improves ride greatly)Plenty of power and if you use synthetic oil you can get 22mpg in town and better on the hwy. Since switching to synthetic oil it gets 22mpg consistently in town weather I lead foot it or drive like Grandma. This is the perfect blend between sports car and luxury car. Luxury usually sacrifices a bit of style and pep which this has both, and sports cars usually sacrifice smooth ride which this has too.This is the closest thing you can get to a BMW or a Mercedes for 30 grand. Camry and Accord feel cheap by comparison.

Gas Mileage


  • 16
  • cty
  • 23
  • highway
Calculate Yearly Fuel Costs

Full 2003 Mitsubishi Diamante Review

What's New for 2003

After introducing the sporty VR-X trim level halfway through 2002, the Diamante continues into 2003 with no changes.

Talk About The 2003 Diamante