2003 Infiniti FX45 Road Test Specs | Edmunds

2003 INFINITI FX45 - Road Test Specs

2003 Infiniti FX45 SUV

(4.5L V8 AWD 5-speed Automatic)


Model year2003
StyleAWD 4dr SUV (4.5L 8cyl 5A)
Base MSRP$44,225


Drive typeAWD
Engine typeV8
Displacement (cc/cu-in)4.5
Horsepower (hp @ rpm)315 @ 6,400
Torque (lb-ft @ rpm)329 @ 4,000
Transmission type5-speed shiftable automatic


Suspension, frontMacPherson strut
Suspension, rearIndependent multi-link
Steering typePower-assisted rack-and-pinion
Tire size, frontP265/50R20
Tire size, rearP265/50R20
Brakes, frontfront and rear ventilated disc

Track Test Results

0-45 mph (sec.)4.2
0-60 mph (sec.)6.5
0-75 mph (sec.)9.8
1/4-mile (sec. @ mph)15.02 @ 92.4
Braking, 30-0 mph (ft.)27.85
60-0 mph (ft.)109.42
Slalom, 6 x 100 ft. (mph)61.0
Skid pad, 200-ft. diameter (lateral g)38.7
Sound level @ idle (dB)51
@ Full throttle (dB)78
@ 70 mph cruise (dB)76

Test Driver Ratings & Comments

Acceleration commentsJust as a small car can feel faster than it really is (simply by the nature of its diminutive size and weight), the FX45 masks its acceleration in a large, SUV body. Certainly it feels "quick for an SUV" as soon as you step on the throttle, but getting to 60 mph in 6.53 seconds makes it simply "quick" without any qualifications. With all-wheel drive, traction was never a problem in the FX45, even with VDC turned off. Upshifts are crisp and come at 6,500 rpm, slightly before the 6,700 rpm redline. When placed in manual shift mode the automatic will hold a gear and bounce off the rev limiter at 7,000 rpm rather than upshifting. The engine remains smooth and refined from idle to past redline.
Braking ratingExcellent
Braking commentsAfter four braking runs our distances ranged from 109 to 115 feet, with the second shortest distance coming on the last run (proving fade was not an issue). Like acceleration and handling, the FX45 does not stop like an SUV. Front-end dive is minimal and the vehicle remains straight while producing a lot of G-force. It takes a hefty press on the pedal to induce ABS, but overall braking action is progressive and easy to modulate. The actual ABS noise/vibration is about typical for a modern car.
Handling ratingGood
Handling commentsBuilt on the FM platform, the FX45 feels much like the G35 sedan when navigating the slalom. That's both good and bad. It's good because the steering is quick and body roll is well controlled. It's bad because there is little warning when the tires break free, and the vehicle tends to rotate quicker than expected. Add in the super-sensitive throttle, along with the merely average steering feel, and being smooth through the slalom wasn't easy. Another mitigating factor was the FX45's gearing, which had it nearing the rev-limiter in second gear, but way down on torque in third. I ended up using second gear, but on our faster runs we would hit the rev-limiter as we excited the cones. Despite all of these issues, the FX still averaged an impressive speed for a high profile utility vehicle. — Karl Brauer

Testing Conditions

Elevation (ft.)85
Temperature (°F)76
Wind (mph, direction)1.5 mph

Fuel Consumption

EPA fuel economy (mpg)Auto 15/19
Fuel tank capacity (U.S. gal.)23.8

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)4299
Length (in.)189.1
Width (in.)75.8
Height (in.)65
Wheelbase (in.)112.2
Legroom, front (in.)43.9
Legroom, rear (in.)35.2
Headroom, front (in.)40.8
Headroom, rear (in.)39.5
Seating capacity5
Cargo volume (cu-ft)27.4
Max. cargo volume, seats folded (cu-ft)65


Bumper-to-bumper4 years / 60,000 miles
Powertrain6 years / 70,000 miles
Corrosion7 years / miles
Roadside assistance4 years / 60,000 miles
Free scheduled maintenanceNot Available


Front airbagsStandard
Side airbagsStandard
Head airbagsStandard
Antilock brakesStandard
Electronic brake enhancementsbraking assist
Traction controlStandard
Stability controlNot Available
Rollover protectionNot Available
Emergency assistance systemNot Available
NHTSA crash test, driverNot tested
NHTSA crash test, passengerNot tested
NHTSA crash test, side frontNot tested
NHTSA crash test, side rearNot tested
NHTSA rollover resistanceNot tested

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