Research 1999 Infiniti Q45 specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.



Disc - Rear (Yes or ) Yes
Rear Brake Rotor Diam x Thickness (in) 11.5 x 0.6
Brake Type Pwr-Assisted
Brake ABS System Four-Wheel
Drum - Rear (Yes or )
Rear Drum Diam x Width (in)
Disc - Front (Yes or ) Yes
Front Brake Rotor Diam x Thickness (in) 11.7 x 1.1

Cargo Area Dimensions

Trunk Volume (ft³) 12.6

Cooling System

Total Cooling System Capacity (qts) 11.6


Maximum Alternator Capacity (amps) 110
Cold Cranking Amps @ 0° F (Primary) 582


Fuel System SEFI
SAE Net Torque @ RPM 278 @ 4000
Engine Order Code
Engine Type Gas V8
Displacement 4.13L/252
SAE Net Horsepower @ RPM 266 @ 5600

Exterior Dimensions

Liftover Height (in) 28.4
Min Ground Clearance (in) 5.4
Track Width, Rear (in) 60.6
Track Width, Front (in) 60.6
Height, Overall (in) 57.1
Width, Max w/o mirrors (in) 71.7
Length, Overall (in) 199.6
Wheelbase (in) 111.4

Fuel Tank

Fuel Tank Capacity, Approx (gal) 21.4

Interior Dimensions

Front Shoulder Room (in) 56.7
Front Leg Room (in) 43.5
Front Head Room (in) 37.6
Second Head Room (in) 36.8
Second Leg Room (in) 35.8
Second Shoulder Room (in) 56.7
Second Hip Room (in) 55.7
Passenger Volume (ft³) 97.4
Front Hip Room (in) 55.7
Passenger Capacity 5


EPA Fuel Economy Est - Hwy (MPG) 24
EPA Fuel Economy Est - City (MPG) 17


Steering Type Pwr Rack & Pinion
Turning Diameter - Wall to Wall (ft) -TBD-
Turning Diameter - Curb to Curb (ft) 36.1
Lock to Lock Turns (Steering) 3.2
Steering Ratio (:1), Overall 18.5


Vehicle Name Infiniti Q45
Vehicle Name Infiniti Q45
Body Style 4 Door Sedan


Suspension Type - Rear (Cont.) w/Coil Springs
Suspension Type - Front (Cont.) w/Coil Springs
Suspension Type - Rear Multi-Link
Suspension Type - Front Strut-Type
Shock Absorber Diameter - Front (mm) 35
Shock Absorber Diameter - Rear (mm) 25
Stabilizer Bar Diameter - Front (in) 1.34
Stabilizer Bar Diameter - Rear (in) 0.95


Front Tire Order Code
Rear Tire Order Code
Spare Tire Order Code
Front Tire Size P215/60VR16
Rear Tire Size P215/60VR16
Spare Tire Size T135/90D16


Wt Distributing Hitch - Max Tongue Wt. (lbs) -TBD-
Dead Weight Hitch - Max Trailer Wt. (lbs) 1,000
Dead Weight Hitch - Max Tongue Wt. (lbs) 110
Wt Distributing Hitch - Max Trailer Wt. (lbs) -TBD-


Seventh Gear Ratio (:1)
Third Gear Ratio (:1) 1.000
Second Gear Ratio (:1) 1.479
First Gear Ratio (:1) 2.569
Trans Description Cont. Again Electronic
Trans Description Cont. Automatic w/OD,
Trans Type 4
Trans Order Code
Drivetrain Rear-Wheel Drive
Final Drive Axle Ratio (:1) 3.692
Clutch Size (in)
Reverse Ratio (:1) 2.275
Sixth Gear Ratio (:1)
Fifth Gear Ratio (:1)
Fourth Gear Ratio (:1) 0.694


EPA Classification Mid-Size

Weight Information

Base Curb Weight (lbs) 3,895


Front Wheel Material Aluminum
Rear Wheel Material Aluminum
Spare Wheel Material Steel
Front Wheel Size (in) 16" x 7"
Rear Wheel Size (in) 16" x 7"
Spare Wheel Size (in) 16" x 4"