1999 Mitsubishi Diamante Super Saloon 3.0 V6 from Australia and New Zealand


Terrific car if kept serviced


On the whole, I've never had a problem with this car since the day I brought it.

General Comments:

One of the major reasons I've never had a problem with this car in all the 10 years I've had it, is due to regular services. The car has always preformed well, and gives me the power when I need it.

Would you buy another car from this manufacturer? Yes

Review Date: 8th November, 2009

1999 Mitsubishi Diamante 3.5L V6 SOHC from North America


Good buy for the highway driver, but Diamante's are only for someone with a big wallet


Traction control - faulty before purchase (130,000), causing the car to eat through brakes.

Head gasket blew - 150,000 miles.

Back seats worn badly prior to purchase (negligence of owner).

Starter seized up - 165,000.

A/C condenser seized up - 145,000.

Headliner fell in - first stages upon buying (riding with windows down only increased this)

Stock Infinity stereo CD player - quit reading lightly scratched disk - 140,000.

Fuel economy - (factory tag: 22-27 highway) actual: 22 highway.

General Comments:

This car handles like a Cadillac. It has soft suspension; great for long highway stretches.

Comes with lots of easy to use and easy to access controls, 6 cup holders, and plenty of room for people riding in the back seats (just as long as you aren't a tall fellow).

My model had seat warmers, although not piping hot, they did adequately well.

The big 3.5L, has plenty of power (I easily out powered many other like import models). The transmission matches the engines torque perfectly, not even having the shift while climbing up and down hills. If not mistaken, JD Power gave an award for this experimental transmission of the Diamante this year (don't quote me).

One major downside was, while trying to hide speaker wiring, I was trying to place back a panel that hides the seat belt system. Too much pressure while putting it back in, caused an explosion in the harness system, which caused the seat belt to lock up. After I realized I couldn't pop my trunk, my gas tank, the antennae wouldn't go up anymore, and also the key less entry failed to work. I never have found the fuse that controlled this, but thanks too many extras the rear antennae help with some radio. Dealership estimates for this and other fixes were outrageous. Found cheap used parts at (www.all-parts.com).

Lastly, access to the back 3 spark plugs for self-maintenance were limited due to the air intake being in the way. This is a costly maintenance repair for the less inclined.

Would you buy another car from this manufacturer? No

Review Date: 20th January, 2009

24th Jul 2009, 12:21

Let me get this straight. You had problems with a car after 135,000 miles?? Are you serious?? When you find a car that is problem-free after 135,000 miles without a single repair let me know. I want to make sure my next 400,000 mile car has no problems as well.

24th Apr 2010, 18:36

Any car which makes 130,000 miles and has some little problems has done a good life, and should not be downed for that.

1999 Mitsubishi Diamante Super Saloon 3.0 V6 from Australia and New Zealand


Don't even think about it... Don't buy a Mitsi!


Water pump failure after 8000km driving. Cambelt shredded, valves bent.

Car "conked out" after start-up occasionally.

General Comments:

At face value this car has strong performance and a comfortable interior with plenty of features, which delivers reasonable fuel economy.

This car (when it worked) was a great car on long trips, could overtake anything, and handled surprisingly well for its size.

But that's where the fun ends... This car had a catastrophic water-pump / cambelt failure despite it being replaced 8000km ago.

I was then caught in the middle of 2 Mitsubishi dealers fighting over who was to blame! Car wasn't the same after its eventual repair.. transmission was slippy and the car wouldn't idle properly after startup.

Will NEVER own a Mitsubishi again.

Would you buy another car from this manufacturer? No

Review Date: 17th January, 2009

19th May 2010, 00:52

That is not a review. All simple things to fix if care was taken. You got screwed and should have fought the dealers about it.

24th Aug 2010, 00:34

I find this review to make no sense what so ever.

If you have a cam belt broken that is the fault of the owner not the car. It is a lack of maintenance.

As for the car sales men arguing. That is their affair. Tell them to resolve it. Telling people that this car is trash because it broke a cam belt is silly.

23rd Jul 2015, 09:31

No maintenance can prevent the cambelt from going.


23rd Jul 2015, 20:08

Uh, what? A cambelt is a maintenance issue - it is to be replaced at particular intervals (together with the tensioner, rollers, and often the water pump, if it is run by the cambelt). Typically replaced at anything from 100-120K km.

26th Sep 2015, 06:58

Thanks. This review was helpful for me looking at a good deal on a Diamante right now.

Re some of the other comments... there could be 10 other people reading this, thinking hey my Diamante cam-belt went ridiculously early too! Personal experiences are all subjective, but any information should be appreciated on the site. I'd never buy a Subaru Forester (repeated oil leaky motor and right again wrong again clutch) again. I would buy a Nissan Pulsar (clutch cable broke at 280,000km, never spent anything before or after that) again in a heartbeat, but that's only my experience.