Research 2004 Infiniti Q45 specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.

Luxury Luxury


Disc - Rear (Yes or ) Yes
Rear Brake Rotor Diam x Thickness (in) 11.5 x 0.6
Brake Type Power
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) 11.4 x 1.1

Cargo Area Dimensions

Trunk Volume (ft³) 13.6

Cooling System

Total Cooling System Capacity (qts) 8.9


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


Fuel System SMPI
SAE Net Torque @ RPM 333 @ 4000
Engine Order Code
Engine Type Gas V8
Displacement 4.5L/275
SAE Net Horsepower @ RPM 340 @ 6400

Exterior Dimensions

Liftover Height (in) - TBD -
Min Ground Clearance (in) 5.7
Track Width, Rear (in) 61.4
Track Width, Front (in) 62.2
Height, Overall (in) 58.7
Width, Max w/o mirrors (in) 72.6
Length, Overall (in) 199.6
Wheelbase (in) 113.0

Fuel Tank

Fuel Tank Capacity, Approx (gal) 21.4

Interior Dimensions

Front Shoulder Room (in) 58.2
Front Leg Room (in) 44.0
Front Head Room (in) 38.4
Second Head Room (in) 36.4
Second Leg Room (in) 37.3
Second Shoulder Room (in) 57.2
Second Hip Room (in) 55.0
Passenger Volume (ft³) 102.1
Front Hip Room (in) 56.5
Passenger Capacity 5


EPA Fuel Economy Est - Hwy (MPG) 23
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) 3.3
Steering Ratio (:1), Overall 18.1


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) - TBD -
Shock Absorber Diameter - Rear (mm) - TBD -
Stabilizer Bar Diameter - Front (in) - TBD -
Stabilizer Bar Diameter - Rear (in) - TBD -


Front Tire Order Code
Rear Tire Order Code
Spare Tire Order Code
Front Tire Size 225/55VR17
Rear Tire Size 225/55VR17
Spare Tire Size 225/55VR17


Wt Distributing Hitch - Max Tongue Wt. (lbs) N/A
Dead Weight Hitch - Max Trailer Wt. (lbs) N/A
Dead Weight Hitch - Max Tongue Wt. (lbs) N/A
Wt Distributing Hitch - Max Trailer Wt. (lbs) N/A


Seventh Gear Ratio (:1)
Third Gear Ratio (:1) 1.47
Second Gear Ratio (:1) 2.26
First Gear Ratio (:1) 3.54
Trans Description Cont. Again
Trans Description Cont. Automatic w/OD
Trans Type 5
Trans Order Code
Drivetrain Rear-Wheel Drive
Final Drive Axle Ratio (:1) 3.13
Clutch Size (in)
Reverse Ratio (:1) 2.37
Sixth Gear Ratio (:1)
Fifth Gear Ratio (:1) 0.83
Fourth Gear Ratio (:1) 1.00


EPA Classification Mid-Size

Weight Information

Base Curb Weight (lbs) 3977


Front Wheel Material Aluminum
Rear Wheel Material Aluminum
Spare Wheel Material Aluminum
Front Wheel Size (in) 17 x 7.5
Rear Wheel Size (in) 17 x 7.5
Spare Wheel Size (in) 17 x 7.5