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1999 Infiniti Q45 Base

The 1999 Infiniti Q45 Base is a 266-hp 4.1-liter V8 with a 4-speed electronically-controlled automatic and rear-wheel drive. It starts at $48,725 MSRP and is rated at 18 mpg combined.

It makes 266 horsepower at 5,600 rpm and 278 lb-ft of torque at 4000 rpm, spinning to a 6,600 rpm redline. EPA fuel-economy estimates are 16 mpg city and 22 mpg highway (18 mpg combined).

The Q45 measures 199.6 inches long on a 111.4-inch wheelbase and has a curb weight of 3,895 lb.

Spec Value
Vehicle
Body TypeSedan
PowertrainGas
Price
MSRP$48,725 ($95,052 *)
Engine
Engine TypeVH41DE 4.1L DOHC 32-valve V8
Displacement4.1 L
Horsepower266 hp @ 5,600 rpm
Torque278 lb-ft @ 4000 rpm
Redline6,600 rpm
ValvetrainDOHC, 4 valves/cylinder, 32 valves total
Bore and Stroke93 x 76 mm
Compression Ratio10.5:1
Injection TypeSequential multi-port fuel injection (SMPFi)
Drivetrain
Drive TypeRWD
Differential TypeViscous limited-slip differential (VLSD)
Transmission
Transmission4-speed electronically-controlled automatic (overdrive, lock-up torque converter)
1st Gear2.57 (54 mph **)
2nd Gear1.48 (94 mph **)
3rd Gear1 (139 mph **)
4th Gear0.69 (202 mph **)
Reverse2.28
Final Drive3.69
Fuel Economy
City16 MPG
Highway22 MPG
Combined18 MPG
Recommended FuelPremium unleaded
Tank Capacity21.4 gal
Suspension
Front SuspensionMacPherson strut, coil spring, anti-roll bar
Rear SuspensionIndependent multi-link, coil spring (3-link design)
Turning Diameter36.1 ft
Brakes
Front Brake Disc297 mm vented disc
Rear Brake Disc292 mm vented disc
Tires & Wheels
Wheels Front16x7 in
Wheels Rear16x7 in
Tires Front215/60R16
Tires Rear215/60R16
Dimensions & Weight
Length199.6 in
Width71.7 in
Height57.1 in
Wheelbase111.4 in
Front Track60.6 in
Rear Track60.6 in
Ground Clearance5.4 in
Cargo Volume12.6 ft³
Curb Weight3,895 lbs
Weight Distribution (F/R)57% / 43%
Interior
Headroom Front37.6 in
Headroom Rear36.9 in
Legroom Front43.5 in
Legroom Rear35.8 in
Shoulder Room Front56.7 in
Shoulder Room Rear56.7 in
Hip Room Front55.7 in
Hip Room Rear55.7 in
* Amount adjusted for inflation to 2026 dollars
** Theoretical max speed per gear at redline

Safety & Recalls

NCAP safety ratings

Not crash-tested by NHTSA for this model year.

Recalls

No recalls on file with NHTSA for the 1999 Infiniti Q45.

9 owner complaints to NHTSA for the 1999 Infiniti Q45

Owner Complaints

9 owner complaints filed with NHTSA for the 1999 Infiniti Q45 (2 mention a crash, 1 an injury). See all on nhtsa.gov

Most-cited areas
Tires3
Structure2
Wheels2
Steering1
Suspension1
Vehicle Speed Control1
A complaint can cite more than one area.
Most recent complaints
Apr 9, 2014 · Steering, Suspension Crash
“LEFT FRONT STRUT SPRING BROKE WHILE IN TRAFFIC, SENDING BROKEN SPRING END INTO TIRE RIPPING THE ENTIRE SIDEWALL OF THE TIRE OUT. BLOWOUT CAUSED LOSS OF STEERING WHILE IN THE PROCESS SENT VEHICLE INTO…”
May 8, 2007 · Structure
“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…”
Aug 2, 2006 · Tires
“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…”
Dec 30, 2005 · Wheels
“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…”
Sep 7, 2005 · Tires Crash 1 injury
“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…”

Complaints are unverified reports submitted to NHTSA by owners. They cover the whole model year, not a specific trim, and a count alone doesn't show how common a problem is.

Source: US National Highway Traffic Safety Administration (nhtsa.gov), matched as 1999 INFINITI Q45. US-market vehicles only; data cached for up to 7 days.

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