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2005 Infiniti Q45 Base

The 2005 Infiniti Q45 Base is a 340-hp 4.5-liter V8 with a 5-speed automatic w/overdrive, learning algorithm, manual shift mode and rear-wheel drive. It starts at $56,400 MSRP and is rated at 18 mpg combined.

It makes 340 horsepower at 6,400 rpm and 333 lb-ft of torque at 4000 rpm, spinning to a 6,700 rpm redline. EPA fuel-economy estimates are 16 mpg city and 22 mpg highway (18 mpg combined).

The Q45 measures 200.8 inches long on a 113.0-inch wheelbase and has a curb weight of 4,050 lb.

Spec Value
Vehicle
Body TypeSedan
PowertrainGas
Price
MSRP$56,400 ($93,856 *)
Engine
Engine TypeVK45DE 4.5L DOHC V8
Displacement4.5 L
Horsepower340 hp @ 6,400 rpm
Torque333 lb-ft @ 4000 rpm
Redline6,700 rpm
ValvetrainDOHC, 4 valves/cylinder (32 total), Continuously Variable Valve Timing Control System (CVTCS), variable-length induction
Bore and Stroke93 x 82.7 mm
Compression Ratio10.5:1
Injection TypeElectronic multi-port fuel injection (MPFi)
Drivetrain
Drive TypeRear-Wheel Drive
Transmission
Transmission5-speed automatic w/overdrive, learning algorithm, manual shift mode (recalibrated for 2005)
1st Gear3.54 (48 mph **)
2nd Gear2.26 (75 mph **)
3rd Gear1.47 (116 mph **)
4th Gear1 (170 mph **)
5th Gear0.83 (205 mph **)
Reverse2.37
Final Drive3.13
Fuel Economy
City16 MPG
Highway22 MPG
Combined18 MPG
Recommended FuelPremium unleaded gasoline
Suspension
Front SuspensionIndependent strut-type, stabilizer bar, standard electronically-controlled active damping (driver-selectable Auto/Sport modes)
Rear SuspensionIndependent multi-link, stabilizer bar, standard electronically-controlled active damping (driver-selectable Auto/Sport modes)
Brakes
Front Brake Disc290mm vented disc
Rear Brake Disc292mm vented disc
Tires & Wheels
Wheels Front17-inch titanium-color aluminum-alloy
Wheels Rear17-inch titanium-color aluminum-alloy
Tires FrontP225/55VR17
Tires RearP225/55VR17
Dimensions & Weight
Length200.8 in
Width72.6 in
Height58.7 in
Wheelbase113 in
Front Track62.6 in
Rear Track61.8 in
Ground Clearance5.7 in
Cargo Volume13.6 ft³
Curb Weight4,050 lbs
Weight Distribution (F/R)54% / 46%
Interior
Headroom Front38.4 in
Headroom Rear36.4 in
Legroom Front44 in
Legroom Rear37.3 in
Shoulder Room Front58.2 in
Shoulder Room Rear57.2 in
Hip Room Front56.5 in
Hip Room Rear55 in
* Amount adjusted for inflation to 2026 dollars
** Theoretical max speed per gear at redline

Safety & Recalls

NCAP safety ratings

Tested, but no star ratings were published (2005 Infiniti Q45 4-DR w/SAB).

Recalls

3 recalls on file with NHTSA for the 2005 Infiniti Q45. Not every recall applies to every trim or VIN — check yours at nhtsa.gov/recalls.

Feb 28, 2012 · AIR BAGS:SIDE/WINDOW

NISSAN IS RECALLING CERTAIN MODEL YEAR 2003-2005 INFINITI Q45 VEHICLES. A WIRING CONNECTOR FOR THE SEAT MOUNTED AIRBAG MAY EXPERIENCE INCREASED ELECTRICAL RESISTANCE, RESULTING IN THE NON-DEPLOYMENT OF THE SIDE AIR BAGS.

Consequence: NON-DEPLOYMENT OF SIDE AIR BAGS COULD INCREASE THE RISK OF PERSONAL INJURY.

Remedy: NISSAN WILL NOTIFY OWNERS, AND DEALERS WILL MODIFY THE WIRING CONNECTOR, FREE OF CHARGE. THE SAFETY RECALL BEGAN ON MARCH 19, 2012. OWNERS MAY CONTACT NISSAN CUSTOMER SERVICE AT 1-800-647-7261.

NHTSA campaign 12V079000

Oct 13, 2006 · EXTERIOR LIGHTING:BRAKE LIGHTS

CERTAIN VEHICLES FAIL TO COMPLY WITH THE STOP LAMP AND REFLEX REFLECTOR REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, 'LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT."

Consequence: THIS STANDARD IS TO REDUCE CRASHES, INJURIES AND DEATHS BY PROVIDING ADEQUATE ILLUMINATION OF THE ROADWAY, AND BY ENHANCING THE CONSPICUITY OF MOTOR VEHICLES ON THE PUBLIC ROADS SO THAT THEIR PRESENCE IS PERCEIVED AND THEIR SIGNALS UNDERSTOOD, BOTH IN DAYLIGHT AND IN DARKNESS OR OTHER CONDITIONS OF REDUCED VISIBILITY.

Remedy: DEALERS WILL REPLACE THE REAR COMBINATION LAMP ASSEMBLIES FREE OF CHARGE. THE RECALL IS EXPECTED TO BEGIN ON OR ABOUT APRIL 16, 2007. OWNERS MAY CONTACT INFINITI AT 1-800-662-6200.

NHTSA campaign 06V395000

Aug 29, 2005 · CHILD SEAT:LATCH STRAP

CERTAIN PASSENGER VEHICLES EQUIPPED WITH POWER REAR SEATS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 225, "CHILD RESTRAINT ANCHORAGE SYSTEMS." THE LOWER ANCHORAGE BRACKETS IN THE REAR SEATS DO NOT MEET THE LOCATION REQUIREMENT IN THIS STANDARD. THIS MAY CAUSE DIFFICULTY IN ATTACHING SOME CHILD SEATS TO THESE BRACKETS.

Consequence: IF A CHILD SEAT IS NOT SECURED, THERE IS AN INCREASED RISK OF INJURY IN A CRASH.

Remedy: DEALERS WILL REPLACE THE LOWER ANCHORAGE BRACKETS WITH MODIFIED ONES TO ENSURE THAT THE STANDARD IS MET. THE RECALL BEGAN ON OCTOBER 17, 2005. OWNERS MAY CONTACT INFINITI AT 1-800-662-6200.

NHTSA campaign 05V374000

4 owner complaints to NHTSA for the 2005 Infiniti Q45

Owner Complaints

4 owner complaints filed with NHTSA for the 2005 Infiniti Q45 (1 mention a crash, 1 an injury). See all on nhtsa.gov

Most-cited areas
Air Bags1
Electrical System1
Seats1
Tires1
Vehicle Speed Control1
A complaint can cite more than one area.
Most recent complaints
Jan 26, 2019 · Vehicle Speed Control
“WHEN CRUISE CONTROL IS SET, AND THE NEED TO PASS OR SPEED UP IS REQUIRED, IF YOU PRESS THE GAS PEDAL TO THE FLOOR THE CAR TAKES OFF AND *THEN STOPS RESPONDING AND DROPS BACK TO SET CRUISE CONTROL…”
Jun 20, 2012 · Air Bags, Seats Crash 1 injury
“TL* THE CONTACT OWNS A 2005 INFINITI Q45. THE CONTACT STATED THAT WHILE DRIVING 35 MPH, ANOTHER VEHICLE CRASHED INTO HER PASSENGER SIDE. THE AIR BAGS DID NOT DEPLOY AND THE FRONT DRIVER'S SEAT TWISTED…”
Jan 14, 2011 · Tires
“I PURCHASED 4 NEW TIRES FOR MY VEHICLE ON 7/24/2010 THE TIRES IN QUESTION ARE MICHELIN P245/45R18 PRIMACY MXV4 96V. AFTER ONLY 3500 MILES THE REAR RIGHT TIRE BLEW ON THE HIGHWAY, FORTUNATELY FOR ME…”
Oct 17, 2007 · Electrical System
“TL*THE CONTACT OWNS A 2005 INFINITI Q45. WHILE THE VEHICLE WAS PARKED, THE CONTACT ATTEMPTED TO START THE VEHICLE; HOWEVER, THE KEY WOULD NOT TURN IN THE IGNITION. SHE CALLED AAA TO GET 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 2005 INFINITI Q45. US-market vehicles only; data cached for up to 7 days.

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