Overview & Reviews

The M45 performance sport sedan comes standard with class-leading V8 performance and a long list of world-class amenities.

• Brawny V8 engine, capable handling, plenty of luxury features, reasonable price.

• Limited rear-seat legroom and trunk space, fussy control layout.

User Reviews:

Showing 1 through 10 of 105.00

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  Best full sized car I have ever owned. - 2003 Infiniti M45
  By voltag19 - November 22 - 2:00 am

  This fine car has unlimited power to spare.

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  2003 Q45 Oil Consumption, Defec Brakes - 2003 Infiniti M45
  By 2003 Q45 - November 20 - 4:20 am

  I purchased the Q45 in March 2003 and have 16k miles on it now. It has always been service by Infiniti wihtin the manufacturer specs. When I picked up the car, the front rotors were warped...they cut them. This problem has persisted over the past three years and they simply cut the rotors. Secondly, the car burns over 1 quart of oil per 1000 miles. As everyone else has experienced, Infiniti denies there is a problem, states that burning 1 quart per 1000 miles is normal. If you persist, they will then go through the "consumption test" and will try everything they can EXCEPT FIX THE PROBLEM. It borders on criminal to sell someone a $60K car with these problems and not fix the car.

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  Power, Raw Power - 2003 Infiniti M45
  By James M - September 15 - 2:00 am

  We had been looking for a new car and just happened on Infiniti, I took a Q- 45 for a ride first then a G-35 witch I realy liked but it was a little to small so the salesman says we just got a new car in want to give it a try, I said why not. Me and my wife took it for a ride and that was all it took after I hit the gas peddle the first time we looked at each other and knew this was it. This was Oct.2 ordered Oct 4 and took delivery Jan. 13 and have put almost 7,000 miles since.

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  Great Car - 2003 Infiniti M45
  By marshalldempsey - May 15 - 2:00 am

  This is a great car. It has style, power, handling and the interior is nice without being a luxury car. The controls make sense, the options are easier than the C class, which I also think is a great car. The Infiniti does not have the quirkeness: brake dust, strange HVAC controls, uncovered seat rail bolts.

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  Love this car - 2003 Infiniti M45
  By John Welcome - April 29 - 10:00 am

  After test driving a LS400 top of the line Lexus then visiting the Infiniti dealership, it was an easy choice. The dealership not only treated us more professionally, but had a superior product with a much better price tag. Loved driving this car its lots of fun. Ran a G-tech on the car and it ran 0-60 in 6 seconds and a quarter mile in 14.2 not bad for a four door sedan. If you are looking dont miss a test drive of this car. So far the only downside I noticed was that the controls on the side of the seat are not real easy to reach, however once the seats are set the memory seats are easy to reach.

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  Bargain of the century - 2003 Infiniti M45
  By sar - January 27 - 10:00 am

  Second infiniti owned, and second loved. Great cars all-around, and what a bargain. Why pay $10,000+ for a comp. equiped BMW or Merc? This car is beautiful. Had a jag owner dying over the specs and price.

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  M45 - 2003 Infiniti M45
  By M45 - December 25 - 3:36 pm

  One of the best cars Ive ever driven next to the Mercedes cars. The car is a head turner to most, but is subject to criticism by a few due to the styling, but that makes it all the better. This car doesnt follow the same lines or mold as the other cars. Infiniti stepped outside the box on this 03-04 M45 setup and Im glad they did. The car is strong and handles well in the straight away. I havent had any issues since I bought it in 2005. No gas gauge or oil issues.

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  Most bank for the buck!! - 2003 Infiniti M45
  By TWD in Austin, Tx. - November 20 - 2:00 am

  I bought the first M45 in Austin and smoked a Porsche Boxter the first week. I looked at the new E500 and there was no comparison, especially for the price. Ive had three Corvettes and this one will definately keep pace with my 93 and seems to handle better, suprising for a large four door sedan. Looks best in Black with chrome wheels. Very 70s in style which I like but with far more technology. Though Ive had mine now for two months, Ive seen only one other one here. It appears this car will be another "sleeper." Ill have fun smoking other "so called" competitors: 540i, GS 430 and E 500.

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  NO COMPLAINTS AT ALL!!!!! - 2003 Infiniti M45
  By JAYYOSH - November 20 - 2:00 am

  THIS IS AN AWESOME VALUE FOR THE $$$S FOR THE SAME AMOUNT, YOU CAN WASTE YOUR HARD EARNED MONEY ON A 6 CLY. BMW 530 OR A 6CYL. LEXUS GS300. A VERY HIGH RECOMENDATION IF YOU WANT TO GET ANY OF THESE VEHICLES. ALL I HAVE TO SAY IS, 340 HORSES!!!! ANY QUESTIONS????

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  M45-Great Car! - 2003 Infiniti M45
  By BobH060941 - November 3 - 10:00 am

  This is a terrific vehicle-powerful and fun to drive. Only 2 shortcomings: fuel economy and turning radius