Most common 1999 Infiniti Q45 problems
Share of the 9 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Infiniti Q45 complaints by model year
Best Q45 years: 2003, 2005, 2001. Years to avoid: 2002. Compare all years →
What 1999 Infiniti Q45 owners say
Wheels & tires
My car a 1999 Infiniti Q45 has 4 continental tires. These were purchased last year and has been used for about 6000 miles. On Tuesday August 30 the right rear tire blew out causing the vehicle to slide on the right side and eventually overturn. Is it normal with a steel belted radial for the thread surface to come completely off the sidewall. The affected tire is in 3 pieces with the walls on the rim and the tread completely cut off but still in a circle.
Dt*: the contact stated the driver's side rear tire blew out while driving on the freeway at 20 MPH. The contact stated the tires were maintained well at 35psi. There were no problems with the steering prior to the incident.
1999 Infiniti Q45 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 4.1L 8-cyl | 4-speed automatic | RWD | 16 / 22 / 18 |
EPA ratings. Class: Midsize car.
Frequently asked questions
Is the 1999 Infiniti Q45 a good car?
Based on 9 owner complaints filed with NHTSA, the 1999 Q45 rates average: 1.2× as many complaints as a typical year of the Q45 at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 1999 Infiniti Q45?
The wheels & tires — 5 complaints, 56% of all complaints for this model year. Next are the body & structure (2) and speed control & acceleration (1).
How many recalls does the 1999 Infiniti Q45 have?
NHTSA lists no recalls for the 1999 Infiniti Q45. You can still confirm with your VIN using our VIN recall check.
What are the best and worst years of the Infiniti Q45?
The best years by complaints, compared at the same age, are 2003, 2005 and 2001. Years to avoid or approach with caution: 2002. See the full Infiniti Q45 years comparison.
At what mileage do 1999 Infiniti Q45 problems happen?
The median mileage reported in complaints is about 114,000 miles; 0% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.