2003 Mitsubishi Diamante Sedan Review | Edmunds.com

2003 Mitsubishi Diamante Sedan

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Certified Pre-Owned (CPO) is a category of used car. Often late-model vehicles, they have been inspected, refurbished, if necessary, and are under warranty by the manufacturer.
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.

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.

What Others Are Saying

Customer Reviews

5 of 5 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

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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

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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.

Nice car but could of

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

Well I bought my Diamante used.. I loved this car when I test drove it. Beware! This car carries a high symbol for insurance rates. This car is 5 years old and has a higher symbol than most brand new cars. Not worth it to insure it . Get insurance quote before u buy. Other than the high insurance and the 19 mpg on highway (which sucks with the price gas today) ---- I'm trading it in. For cheaper insurance and better gas mileage . On the other hand the car has a nice style about it. It runs smooth. Oh and not very good in snow or slush. Parts and labor are more expensive

Beautiful car

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

We bought the car new in 03. Overall this car is so beautiful and rivals BMW and Lexus in my opinion. It's designed beautifully both inside and out and is unique from other luxury sedans. We have had some quality issues however. The brake light in the rear windshield constantly falls and we've taken it to the dealer 5 times. They still haven't fixed it. We have to keep it propped up. Plastics are very cheap looking. The black rubber molding in the passenger side door has had to be replaced in the front seat and the back seat is now having issues too. Also issues with paint chipping and wind noise. Glove box doesn't latch properly and hangs open a bit even when closed.

1 of 1 people found this review helpful

Best car out there!!

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

I love driving my car! Mine is very fast. I maintain mine and do oil changes religiously so it is still in great shape with 65,000 miles on it. It hasn't spent one day in the garage. I love the appearance, all the options, and the size. I can have my son's car seat in the middle and still have room for adult passengers on both sides of him. I have more room for people and stuff than small SUVs. The trunk space is very generous. All the luxury items without the over-inflated price tag!

Talk About The 2003 Diamante

2003 Mitsubishi Diamante Discussions See all Started By

2003 mitsubishi diamante...

In 2003 it would be fair to say the Diamante doesn't stack up to a lot of other cars since it was last new in 97....but in 2003 you can buy a Diamante really cheap. Where I see the Diamante fitting i...

Reintroduce the Montero (it's sold and heralded everywhere in the world except here. thanks consumer reports) and the Diamante (see article below)...

Gas Mileage


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