1991 Infiniti Q45 Q45a
_V8_front_4.13.19.jpg)
Unverified
All photo credits
- Photo: 1995 Infiniti Q45 (4.5) V8 front 4.13.19 by Kevauto, CC BY-SA 4.0, via Wikimedia Commons
- Photo: 1993 Infiniti Q45 in Beige, front left by Mr.choppers, CC BY-SA 3.0, via Wikimedia Commons
- Photo: 1995 Infiniti Q45 (4.5) V8 rear 4.13.19 by Kevauto, CC BY-SA 4.0, via Wikimedia Commons
- Photo: 1994 Infiniti Q45 (29380535620) by Riley from Christchurch, New Zealand, CC BY 2.0, via Wikimedia Commons
The 1991 Infiniti Q45 Q45a is a 278-hp 4.5-liter V8 with a 4-speed automatic and rear-wheel drive. It starts at $43,385 MSRP and is rated at 17 mpg combined.
It makes 278 horsepower at 6,000 rpm and 292 lb-ft of torque at 4000 rpm. EPA fuel-economy estimates are 15 mpg city and 20 mpg highway (17 mpg combined).
The Q45 measures 199.8 inches long on a 113.2-inch wheelbase and has a curb weight of 4,241 lb.
| Spec | Value |
|---|---|
| Vehicle | |
| Body Type | Sedan |
| Powertrain | Gas |
| Price | |
| MSRP | $43,385 ($103,525 *) |
| Engine | |
| Engine Type | 4.5L DOHC V8 (VH45DE) |
| Displacement | 4.5 L |
| Horsepower | 278 hp @ 6,000 rpm |
| Torque | 292 lb-ft @ 4000 rpm |
| Valvetrain | DOHC, 4 valves/cyl (32 total), variable valve timing |
| Bore and Stroke | 93.0 x 82.7 mm |
| Compression Ratio | 10.2:1 |
| Injection Type | Electronic multiport fuel injection |
| Drivetrain | |
| Drive Type | Rear-wheel drive |
| Differential Type | Viscous limited-slip differential (R200V) |
| Transmission | |
| Transmission | 4-speed automatic (RE4R03A) |
| 1st Gear | 2.784 |
| 2nd Gear | 1.544 |
| 3rd Gear | 1 |
| 4th Gear | 0.694 |
| Final Drive | 3.538 |
| Fuel Economy | |
| City | 15 MPG |
| Highway | 20 MPG |
| Combined | 17 MPG |
| Recommended Fuel | Premium unleaded (91 octane) |
| Tank Capacity | 22.5 gal |
| Suspension | |
| Front Suspension | Independent wishbone, coil springs, stabilizer bar, plus Full-Active Suspension (computer-controlled hydraulic actuators, 10 sensors) |
| Rear Suspension | Independent multi-link, coil springs, Super HICAS 4-wheel steering, plus Full-Active Suspension (computer-controlled hydraulic actuators, 10 sensors) |
| Front Stabilizer Bar | 1 mm smaller diameter than Base |
| Rear Stabilizer Bar | Added, larger diameter than Q45t |
| Brakes | |
| Front Brake Calipers | Single-piston floating caliper (CL28VF) |
| Front Brake Disc | 11.02 in (280 mm), ventilated |
| Rear Brake Disc | 11.50 in (292 mm), solid |
| Tires & Wheels | |
| Wheels Front | 16 x 7 in |
| Wheels Rear | 16 x 7 in |
| Tires Front | 215/60R16 |
| Tires Rear | 215/60R16 |
| Dimensions & Weight | |
| Length | 199.8 in |
| Width | 71.9 in |
| Height | 56.3 in |
| Wheelbase | 113.2 in |
| Front Track | 61.8 in |
| Rear Track | 61.8 in |
| Cargo Volume | 14.8 ft³ |
| Curb Weight | 4,241 lbs |
| Interior | |
| Headroom Front | 38.2 in |
| Headroom Rear | 36.3 in |
| Legroom Front | 43.9 in |
| Legroom Rear | 32 in |
Similar cars
Rivals to the 1991 Infiniti Q45 Q45a with similar size, power and price from around the same years.
Safety & Recalls
NCAP safety ratings
Not crash-tested by NHTSA for this model year.
Recalls
2 recalls on file with NHTSA for the 1991 Infiniti Q45. Not every recall applies to every trim or VIN — check yours at nhtsa.gov/recalls.
Nov 5, 1998 · EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.
VEHICLE DESCRIPTION: PASSENGER VEHICLES EQUIPPED WITH BOSE REAR SPEAKERS THAT HAVE AN INTEGRAL AMPLIFIER. A CONDUCTIVE BRIDGE CAN FORM BETWEEN TWO LINES OF THE CIRCUIT BOARD PATTERN WHEN THERE IS ACCUMULATED ELECTROLYTE LEAKED FROMA CAPACITOR AND HIGH HUMIDITY CONDITIONS. THIS CAN CLOSE A TRANSISTOR ON THE CIRCUIT BOARD WHICH CAUSES OVERHEATING.
Consequence: THIS CONDITION COULD RESULT IN SMOKE OR FLAME AND POSSIBLY THE SPEAKER CATCHING FIRE.
Remedy: DEALERS WILL REPLACE THE CIRCUIT BOARD WITH A NEW BOARD THAT HAS BEEN COATED.
NHTSA campaign 98V284000
May 24, 1995 · SEAT BELTS:FRONT:BUCKLE ASSEMBLY
THE FRONT SAFETY BELT BUCKLE RELEASE BUTTONS CAN BREAK. THESE RED PLASTIC RELEASE BUTTONS ARE MARKED "PRESS." IF A BUTTON BREAKS, PIECES CAN FALL INTO THE BUCKLE ASSEMBLY CAUSING THE BUCKLE TO OPERATE IMPROPERLY.
Consequence: THE SAFETY BELTS WOULD NOT PROVIDE ADEQUATE PROTECTION TO AN OCCUPANT IN A VEHICLE CRASH.
Remedy: OWNERS SHOULD PROMPTLY CHECK THE CONDITION AND OPERATION OF BOTH FRONT SAFETY BELT BUCKLES AND CAREFULLY INSPECT THE RED RELEASE BUTTON FOR ANY BREAKS OR CRACKS. THEY SHOULD ENSURE THAT BOTH BUCKLES ARE OPERATING PROPERLY BY INSERTING EACH LATCH PLATE INTO ITS BUCKLE, TUGGING ON THE BELT TO MAKE SURE THE LATCH IS SECURELY LOCKED, AND THEN PRESSING THE RELEASE BUTTON. THE LATCH PLATE SHOULD POP OUT OF THE BUCKLE WHEN THE BUTTON IS PRESSED. IF EITHER RELEASE BUTTON SHOWS A SIGN OF BREAKING OR CRACKING OR IF EITHER BUCKLE FAILS TO OPERATE PROPERLY, OWNERS SHOULD PROMPTLY CONTACT THEIR AUTHORIZED DEALER TO SCHEDULE AN APPOINTMENT TO HAVE THE BUCKLE REPLACED OR REPAIRED FREE OF CHARGE.
NHTSA campaign 95V103002
35 owner complaints to NHTSA for the 1991 Infiniti Q45
Owner Complaints
35 owner complaints filed with NHTSA for the 1991 Infiniti Q45 (3 mention a crash, 4 a fire, 2 an injury). See all on nhtsa.gov
| Equipment | 6 |
| Hydraulic | 6 |
| Service Brakes | 6 |
| Power Train | 5 |
| Electrical System | 3 |
| Engine And Engine Cooling | 3 |
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 1991 INFINITI Q45. US-market vehicles only; data cached for up to 7 days.