1999 Infiniti Q45 Sedan Review | Edmunds.com

1999 Infiniti Q45 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.
Infiniti Q45 Features and Specs

Features & Specs

  • Engine 4.1 L V 8-cylinder
  • Drivetrain Rear Wheel Drive
  • Transmission 4-speed Automatic
  • Horse Power 266 hp @ 5600 rpm
  • Fuel Economy 16/22 mpg
  • Bluetooth No
  • Navigation No
  • Heated Seats No

Review of the 1999 Infiniti Q45

  • Info is not yet available.

  • Safety
  • Pros

    Powerful rear drive luxury sedan offers distinctive styling and sophisticated interior appointments. Costs less than much of the competition.

  • Cons

    Not as refined as the Lexus LS400.

  • What's New for 1999

    Several small exterior and interior enhancements have been added to the Q for 1999, including a new sunroof, revised front styling and the return of the analog clock.

Full 1999 Infiniti Q45 Review

What's New for 1999

Several small exterior and interior enhancements have been added to the Q for 1999, including a new sunroof, revised front styling and the return of the analog clock.

What Others Are Saying

Customer Reviews

There's not a better car

by on
Vehicle: 1998 Infiniti Q45

Bought a 98' for cheap at 72K. Needed a bit, but after valve cover gaskets, belts, battery, oil, air filter, it was ready to go. It sat for years under previous ownership. When I purchased, it had the original belts on it still. A testament to Nissan/Infiniti build quality. It doesn't do bad MPG-wise either. It goes when you need it to. Despite the size, it goes around corners, and stops quickly if need be. And it is comfortable! Expect 19 for city driving. A mix, you'll get 22 if you drive easily. Highway, right around 24 for me; way higher than the EPA estimate. For the money, you could get a Lexus LS400, but it looks worse, and it just isn't as nice. (I have a buddy who has one.)

Forced retirement

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Vehicle: 1998 Infiniti Q45

Just had to retire my 1998 Q45 due to being rearended and totalled. Car had 232000 on it and was overall very reliable. Not a single problem until 155,000 Miles. Fuel Injectors, Coils, and just age were starting to cause more problems, but I think it would have gone to 300,000 if not for accident. Overall, fun to drive, reliable, and excellent value as cost to own is only a little expensive with gas costs. But it proved to be safe as I hardly felt the hit from behind and he was going about 35 miles an hour.

Best sleeper car ever made

by on
Vehicle: 1998 Infiniti Q45

Now that I'm at the point of retiring from Q45s it is safe for me to say that this is one of the best vehicles ever made. You can get them for 4k with 90k miles in 100% condition from an 80 year old doctor, then drive the crap out of them. We have bmw's but I take the q45 when it's highway time. A really great vehicle and the ultimate sleeper.

Best car ever made

by on
Vehicle: 1998 Infiniti Q45

I have had my Infiniti Q45 for 10 years. It has 190,000 miles on it and the only thing that has ever been wrong (other than standard maintenance) on it is the alternator at 135,000 miles. It is simply an amazing vehicle and is a VERY underrated vehicle. I finally bought a new Nissan this year but gave the Q45 to my 16 yr old daughter. After 4 months, I want my Q45 back! Best car Ever!

Superb ride

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Vehicle: 1998 Infiniti Q45

I must confess that I was a HUGE Lexus fan and have owned the LS 400 and GS 400. Unfortunately I totaled my GS and we didn't want a car note, and couldn't find another GS that matched our price point. So, my husband bought the '98 Q for me and told me that I would not be disappointed. Well, how sweet it is! What a beautiful ride and it moves quickly when I need it to. A whole lot of power and luxury for very little cost. It is definitely an under rated vehicle. After owning Lexus V8s, this Q can role just as hard, if not harder! Oh and I forgot to mentioned that it currently has 138,000 miles on it.

1 of 1 people found this review helpful

The jewel of jewels

by on
Vehicle: 1998 Infiniti Q45

I bought my Q45 10 years ago and it now has 188,000 miles on it. I am amazed at the reliability of this vehicle. It is far and away the best car I've ever owned. It still runs perfectly- like new today. I keep waiting for something major to go wrong so I can justify trading it in but it continues to run and operate perfectly. It handles well, is very comfortable, powerful and quiet. The only item that ever failed was the alternator at 125,000 miles. I just need to tell the world that this car is the UNBELIEVABLY reliable. I am finally considering trading it in only because I've had it for 10 years and I want something different. I'm sure I'll be disappointed with it's replacement. Its a 10!

Talk About The 1999 Q45

1999 Infiniti Q45 Discussions See all Started By

I have a 94 q45 with 76,000 miles. I also experienced vibration at 55 mph and above. It turns out to be a relatively simple problem to solve. The suspension in the Q45 is very sensitive to the type...

According to the specs reached from this link http://www.edmunds.com/used/1999/infiniti/q45/index.html it's a 4.1 liter engine with 266 horsepower....

I don't have a J30 anymore. I have a 1999 Q45!!! I had to have it. It was a fantastic price and I liked the way it looked an everything. I will miss the J but the 1997 to 2001 Q45 has always turned my...

Gas Mileage


  • 16
  • cty
  • 22
  • highway
Calculate Yearly Fuel Costs
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