Research · Midsize Cars
1999 Infiniti Q45Recalls, problems, MPG & safety
NHTSA lists 0 safety recalls and 9 owner complaints for the 1999 Infiniti Q45. Most complaints involve tires (3) and structure (2). The EPA rates it 18 mpg combined.
Combined MPG
18mpg
EPA · 1 version
NHTSA overall
—
Not rated by NCAP
Safety recalls
0campaigns
NHTSA
Owner complaints
9
Top: tires
Fuel cost / yr
$4,200est.
EPA estimate, best version
Safety recalls
NHTSA campaigns for this model year
0 recalls found in NHTSA data for the 1999 Infiniti Q45 as of Nov 13, 2026.
Data from NHTSA Recalls API · synced Nov 13, 2026NHTSA vehicle page
Owner complaints by component
9 complaints filed with NHTSA · Jun 2000 – Apr 2014
- Tires3
- Structure2
- Wheels2
- Steering1
- Suspension1
- Vehicle speed control1
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 13, 2026NHTSA vehicle page
What owners report most
Verbatim excerpts from NHTSA complaints, by component
Tires
3 reports1 crash
“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.”
Structure
2 reports
“WHILE CHECKING THE OIL IN THE 1999 Q45 INFINITI THE HOOD SUDDENLY FELL AND SLAMMED CLOSED. THIS HAPPENED IN JANUARY 2007 ,AND AGAIN MARCH 2007. ALL THREE TIMES I HAD TURNED AWAY MOMENTARILY AND WAS NOT INJURED. SINCE THE EXPERIENCE IN APRIL I NOW CARRY A PROP STICK AS A PRECAUTION. THE PROBLEM APPEARED INTERMITTENT AND DEPEND ON THE AMBIENT TEMPERATURE. THE COOLER IT WAS THE MORE LIKELY IT WOULD HAPPEN. SINCE THIS FIRST OCCURRENCE I HAVE SEARCHED FOR AFTER MARKET PARTS TO REPLACE THE LIFT SUPPORTS, BUT WAS UNABLE TO FIND ANY RESOURCE. THE AFTERMARKET PARTS WERE ONLY AVAILABLE FOR Q45 HOODS UP TO AND INCLUDING 1996 MODELS. I DID NOT KNOW IF DEALER PARTS WERE AVAILABLE BECAUSE MY SEARCHES HAVE NOT BEEN ABLE TO FIND A DEALER SOURCE FOR THAT PARTICULAR PART. I BELIEVE THIS WAS A MAJOR SAFETY PROBLEM THAT COULD LEAD TO SERIOUS INJURY OR DEATH IF A HOOD SLAMMED DOWN ON SOMEONE WHILE WORKING UNDER THE HOOD. A TECHNICAL SERVICE BULLETIN (TSB) WOULD ALERT ALL OWNERS OF THIS AUTOMOBILE TO THE POTENTIAL DANGER, AND RECOMMEND TO THE MANUFACTURER TO ADDRESS THIS PROBLEM AS WARRANTED.*AK”
Wheels
2 reports
“1999 INFINITY Q-45 WHEELS HAVE A CASTING DEFECT THAT DEVELOPS CRACKS WHEN THE VEHICLE IS DRIVEN. *TS THE WHEELS ARE THE SAME AS THE 2000 Q45 WHICH WAS RECALLED (03V-098). THE CONSUMER CONTACTED THE MANUFACTURER BUT SINCE THE VEHICLE WAS OVER 100000 MILES THEY REFUSED TO PROVIDE ASSISTANCE. *NM”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 13, 2026
Engines, transmissions & drive
1 version rated by the EPA
- EPA class
- Midsize Cars
- Engines
- 4.1L 8-cyl
- Transmissions
- Automatic 4-spd
- Drive
- Rear-Wheel Drive
- Fuel
- Premium Gasoline
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
Data from EPA fueleconomy.gov · synced Nov 13, 2026EPA listing
EPA fuel economy by version
City / highway / combined, annual fuel cost and CO₂
EPA
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| Q45 Auto 4-spd, 8 cyl, 4.1 L · Rear-Wheel Drive | 16 | 22 | 18 | $4,200 | 494 |
- 18mpg comb.
Data from EPA fueleconomy.gov · synced Nov 13, 2026 · Fuel cost is EPA’s annual estimate (15,000 mi, 55% city)
NHTSA 5-Star Safety Ratings
New Car Assessment Program
NHTSA has not published 5-Star Safety Ratings for the 1999 Infiniti Q45 as of Nov 13, 2026.
Data from NHTSA NCAP Safety Ratings API · synced Nov 13, 2026
Maintenance basics
General guidance, not the OEM schedule. Check your owner’s manual.
General guidance
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
- Engine oil & filter5,000–10,000 mi
6–12 months - Tire rotation5,000–7,500 mi
Every oil change - Engine air filter15,000–30,000 mi
1–2 years - Cabin air filter15,000–25,000 mi
1–2 years - Brake fluid—
2–3 years - Coolant60,000–100,000 mi
5–10 years - Spark plugs60,000–100,000 mi
— - 12V battery—
3–5 years
Typical intervals for modern cars. Severe service (towing, short trips, extreme heat or cold) shortens them.
1999 Q45 questions
How many recalls does the 1999 Infiniti Q45 have?
0 recalls found in NHTSA data as of Nov 13, 2026.
What are the most common 1999 Infiniti Q45 problems?
Owners filed 9 complaints with NHTSA. The most-cited components are tires (3), structure (2), wheels (2). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
What MPG does the 1999 Infiniti Q45 get?
The EPA rates the 1999 Infiniti Q45 at 18 mpg combined, depending on engine and drivetrain (1 version rated).
Data from NHTSA & EPA · synced Nov 13, 2026