INFINITI Q45 (1990–2006): Full Technical Specs & OBD2 Diagnostics
Built 1990–2006 · all production years covered on this single page
4.5L V8 • Gasoline
2006
© Wikimedia Commons CC BY-SA
Every figure on this Infiniti Q45 (1990–2006) page is aggregated and cross-checked against more than 6.6 million real workshop operations, NHTSA records and OEM technical sources — and updated continuously. No invented estimates.
The Infiniti Q45 (1990–2006) is powered by a 4.5L V8 engine. Use the sections below for verified fluids, battery, OEM tyres, the maintenance schedule, recommended parts and the most commonly reported OBD2 fault codes for this vehicle.
Common problems
Common repairs
Fluids & lubricants
Battery
Fault codes (OBD2)
Dashboard lights
Parts comparator
Accessories & tools
Tyres
Recalls & TSB
Complaints
Workshops nearby
COMMON PROBLEMS
Transmission fault signal (TCM)MODERATE
The transmission module detected a fault — check separate transmission codes.
Related codes: P0700
Misfire / Loss of cylinderMODERATE
Rough running, idle vibration, power loss.
Related codes: P0300
Thermostat: coolant temperature lowLOW
Thermostat stuck open — engine does not reach operating temperature.
Related codes: P0128
Battery/system voltage lowLOW
System voltage below 10V — check alternator, battery or wiring.
Related codes: P0562
P0011LOW
Check with an OBD2 scanner.
Related codes: P0011
AVERAGE INDICATIVE COSTS
Prices may vary by area and workshop.
Full service
€ 120 – € 200
Full brake service
€ 180 – € 300
Spark plug replacement
€ 80 – € 140
Electronic diagnosis
€ 40 – € 70
WORKSHOP LABOUR RATES BY COUNTRY
Average independent-workshop hourly labour rates, to estimate repair costs in your country.
🇩🇪Germany€95/h
🇪🇸Spain€55/h
🇫🇷France€75/h
🇮🇹Italy€45/h
🇬🇧UK£80/h
🇺🇸USA$120/h
Reference rate
€45/h
Source: Eurostat 2024
💧 FLUIDS & LUBRICANTS
📋 RECALLS & TSB (20)
NHTSA 05V374000
Child Seat › Latch Strap
Date: 29/08/2005
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 STAN…
NHTSA 12V079000
Air Bags › Side/Window
Date: 28/02/2012
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.
NHTSA 12V079000
Air Bags › Side/Window
Date: 28/02/2012
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.
NHTSA 12V079000
Air Bags › Side/Window
Date: 28/02/2012
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.
NHTSA 02V171000
Electrical System › Alternator/Generator/Regulator
Date: 24/06/2002
ON CERTAIN PASSENGER VEHICLES, ONE OF THE DIODES USED IN THE ALTERNATOR MAY HAVE BEEN DAMAGED WHEN BUILT. THIS CAN EVENTUALLY RESULT IN FAILURE OF THE DIODE AND AN ELECTRICAL SHORT WHICH COULD MELT THE PLASTIC HOUSING.
NHTSA 02V171000
Electrical System › Alternator/Generator/Regulator
Date: 24/06/2002
ON CERTAIN PASSENGER VEHICLES, ONE OF THE DIODES USED IN THE ALTERNATOR MAY HAVE BEEN DAMAGED WHEN BUILT. THIS CAN EVENTUALLY RESULT IN FAILURE OF THE DIODE AND AN ELECTRICAL SHORT WHICH COULD MELT THE PLASTIC HOUSING.
NHTSA 95V103002
Seat Belts › Front › Buckle Assembly
Date: 24/05/1995
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.
NHTSA 95V103002
Seat Belts › Front › Buckle Assembly
Date: 24/05/1995
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.
NHTSA 99V129000
Electrical System › Alternator/Generator/Regulator
Date: 20/05/1999
VEHICLE DESCRIPTION: PASSENGER VEHICLES. ONE OF THE DIODES USED IN THE ALTERNATOR MAY HAVE BEEN DAMAGED WHEN BUILT. THIS CAN EVENTUALLY RESULT IN FAILURE OF THE DIODE AND AN ELECTRICAL SHORT WHICH COULD MELT THE PLASTIC HOUSING.
NHTSA 99V129000
Electrical System › Alternator/Generator/Regulator
Date: 20/05/1999
VEHICLE DESCRIPTION: PASSENGER VEHICLES. ONE OF THE DIODES USED IN THE ALTERNATOR MAY HAVE BEEN DAMAGED WHEN BUILT. THIS CAN EVENTUALLY RESULT IN FAILURE OF THE DIODE AND AN ELECTRICAL SHORT WHICH COULD MELT THE PLASTIC HOUSING.
NHTSA 03V098000
Wheels
Date: 19/03/2003
ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH 17 INCH ALLOY WHEELS, THE WHEELS MAY HAVE A CASTING DEFECT FROM WHICH CRACKS COULD PROPAGATE AS THE VEHICLE IS BEING DRIVEN.
NHTSA 03V098000
Wheels
Date: 19/03/2003
ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH 17 INCH ALLOY WHEELS, THE WHEELS MAY HAVE A CASTING DEFECT FROM WHICH CRACKS COULD PROPAGATE AS THE VEHICLE IS BEING DRIVEN.
NHTSA 03V455000
Engine And Engine Cooling
Date: 17/11/2003
ON CERTAIN PASSENGER VEHICLES, THE CIRCUIT BOARD FOR THE CRANK POSITION SENSOR OR CAM POSITION SENSOR MAY HAVE AN IMPROPER SOLDER JOINT DUE TO SOLDER DEFORMATION CAUSED BY HEAT STRESS ACCELERATED BY THE EXISTENCE OF FLUX RESIDUE DURING THE SOLDERING PROCESS.
NHTSA 98V325000
Power Train › Automatic Transmission
Date: 14/12/1998
VEHICLE DESRIPTION: PASSENGER VEHICLES. THE IGNITION KEY CAN BE REMOVED WHEN THE ENGINE IS TURNED OFF WITHOUT PLACING THE TRANSMISSION SHIFT LEVER IN THE "PARK" POSITION. THIS DOES NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 102, "TRANSMISSION SHIFT LEVER SEQUENCE, STARTER…
NHTSA 98V325000
Power Train › Automatic Transmission
Date: 14/12/1998
VEHICLE DESRIPTION: PASSENGER VEHICLES. THE IGNITION KEY CAN BE REMOVED WHEN THE ENGINE IS TURNED OFF WITHOUT PLACING THE TRANSMISSION SHIFT LEVER IN THE "PARK" POSITION. THIS DOES NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 102, "TRANSMISSION SHIFT LEVER SEQUENCE, STARTER…
NHTSA 06V395000
Exterior Lighting › Brake Lights
Date: 13/10/2006
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."
NHTSA 06V395000
Exterior Lighting › Brake Lights
Date: 13/10/2006
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."
NHTSA 04V497000
Exterior Lighting › Brake Lights › Switch
Date: 13/10/2004
ON CERTAIN PASSENGER VEHICLES, THE BRAKE LAMP SWITCH MAY MALFUNCTION.
NHTSA 98V284000
Equipment › Electrical › Radio/Tape Deck/Cd Etc.
Date: 05/11/1998
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…
NHTSA 98V284000
Equipment › Electrical › Radio/Tape Deck/Cd Etc.
Date: 05/11/1998
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…
COMMON OBD2 CODES TO CHECK
P0420
P0420
Powertrain
P0171
P0171
Powertrain
P0300
P0300
Powertrain
P0128
P0128
Powertrain
P0455
P0455
Powertrain
P0700
P0700
Transmission
P0442
P0442
Powertrain
P0172
P0172
Powertrain
P0401
P0401
Powertrain
All documented fault codes for this vehicle
The most documented diagnostic codes for this model, by system and severity. Tap a code for the full guide.
P0455
powertrain
LOW⏱ 0.62h avgP0442
powertrain
LOW⏱ 0.62h avgP0440
powertrain
LOW⏱ 0.78h avgP0420
powertrain
MEDIUM⏱ 1.24h avgP0300
powertrain
HIGH⏱ 1.22h avgP0172
powertrain
MEDIUM⏱ 1.13h avgP0171
powertrain
MEDIUM⏱ 0.95h avgP0730
transmission
MEDIUM⏱ 1.25h avgP0700
transmission
HIGH⏱ 1.25h avgP0401
powertrain
MEDIUM⏱ 1.25h avgP0011
powertrain
MEDIUM⏱ 5.4h avgU0100
network
HIGHP0562
electrical
MEDIUM⏱ 0.58h avgP0128
powertrain
MEDIUM⏱ 0.88h avg
DASHBOARD WARNING LIGHTS — UNIVERSAL GUIDE
53 warning lights classified by urgency. Appears on your vehicle? Check the urgency level.
Show all dashboard warning lights
🔴 IMMEDIATE STOP — pull over
Oil Pressure WarningEngine
Engine Temperature WarningCooling
Brake System WarningBrakes
Immobilizer / Key FaultSecurity
🟠 WARNING — check soon
Malfunction Indicator Light (MIL) / Check EngineEngine
Diesel Particulate Filter (DPF)Emissions
Battery / Charging SystemElectrical
Low Fuel WarningFuel
ABS WarningBrakes
Brake Pad Wear IndicatorBrakes
Electronic Parking Brake (EPB)Brakes
Power Steering WarningSteering
ESC / Stability Control FaultChassis
Tire Pressure Warning (TPMS)Chassis
Transmission Temperature WarningTransmission
Transmission / Gearbox FaultTransmission
Airbag / SRS WarningActive safety
EGR / Exhaust Gas Recirculation FaultEmissions
Catalytic Converter / Emissions FaultEmissions
AdBlue / DEF Level LowEmissions
Coolant Level LowCooling
Hybrid / EV System WarningHybrid
EV Charge System FaultHybrid
12V Battery (Hybrid/EV Auxiliary)Hybrid
Suspension Fault / Air SuspensionSuspension
CAN Bus / Network Communication FaultNetwork
Water in Fuel FilterFuel
Diesel Injector FaultFuel
Steering Angle Sensor FaultSteering
Turbo / Boost Pressure FaultEngine
Regenerative Braking Fault (Hybrid/EV)Hybrid
🟡 MONITOR
Fuel Cap / Evap SystemEmissions
4WD / AWD SystemDrivetrain
Bulb Failure WarningLighting
Headlight Range / Leveling FaultLighting
Service / Maintenance DueMaintenance
A/C System FaultHvac
Clutch Wear WarningTransmission
Cruise Control / ACC FaultADAS
🔵 INFORMATION
Engine Temperature Low (Blue)Cooling
Glow Plug / Diesel PreheatEngine
Traction Control / ESC OffChassis
Seatbelt ReminderActive safety
Rear Fog Light IndicatorLighting
Lane Departure / LDWS WarningADAS
Forward Collision Warning (FCW/AEB)ADAS
Blind Spot Monitor FaultADAS
Rear Parking Sensor / Camera FaultADAS
Windshield Washer Fluid LowMaintenance
Door Open WarningBody
Hood / Trunk Open WarningBody
Gear Shift Indicator (Manual)Transmission
Sport / Performance Mode ActiveTransmission
REPORTED COMPLAINTS & PROBLEMS (NHTSA)
229 owner complaints filed with the U.S. National Highway Traffic Safety Administration (NHTSA) for the Infiniti Q45 across model years 1990–2006. These are real, verified reports submitted by vehicle owners.
28 crash reports 15 fires 28 injuries
Complaints by model year (most reported first)
Model year 199135
Model year 199431
Model year 199029
Model year 199228
Model year 200220
Model year 199813
Model year 200312
Model year 199712
Most reported components (all years)
Electrical System34
Power Train34
Air Bags26
Engine And Engine Cooling21
Vehicle Speed Control17
Suspension16
Sample reports
RIGHT REAR TIRE SUDDENLY BEGAN TO LOSE PRESSURE, AS MUCH AS 5 PSI IN ONE MILE OF FREEWAY DRIVING. I KEPT STOPPING TO AIR UP TIRE, CONFIRMING LOW PRESSURE WITH ACCURATE BOURDON TUBE-TYPE GAUGE. AFTER FOUR STOPS TO AIR UP, PROBLEM QUIT.… (MY 2002)
1999 INFINITY Q-45 WHEELS HAVE A CASTING DEFECT THAT DEVELOPS CRACKS WHEN THE VEHICLE IS DRIVEN. *TS THE WHEELS ARE THE SAME AS THE 2000 Q45 WHICH WAS RECALLED (03V-098). THE CONSUMER CONTACTED THE MANUFACTURER BUT SINCE THE VEHICLE W… (MY 1999)
RECEIVED RECALL NOTICE #98V215000 IN THE MAIL. NOTIFIED DEALER. WAS INFORMED NO PARTS AVAILABLE FOR THEFT PREVENTION. MANUFACTURER WAS CALLED. WAS INFORMED PARTS WILL BE AVAILABLE EARLY NEXT YEAR. *AK (MY 1997)
KEYS ARE VERY DIFFICULT TO INSERT INTO IGNITION AND DOOR LOCKS. (MY 1991)
Source: NHTSA complaints database (U.S. data.gov). Figures cover production years 1990–2006.
Frequently Asked Questions
Does the Infiniti Q45 have any safety recalls?
Yes — 20 official NHTSA recall campaign(s) affect this model, mainly: EXTERIOR LIGHTING:BRAKE LIGHTS, AIR BAGS:SIDE/WINDOW, CHILD SEAT:LATCH STRAP. Check the recalls section for your exact year/VIN.
What does fault code P0300 mean on the Infiniti Q45?
Random/Multiple Cylinder Misfire Detected This code is among the most documented for this model — tap it in the OBD2 section for the full step-by-step guide.
What does fault code P0128 mean on the Infiniti Q45?
Coolant temperature below thermostat regulating temperature — thermostat stuck open or faulty This code is among the most documented for this model — tap it in the OBD2 section for the full step-by-step guide.
What does fault code P0011 mean on the Infiniti Q45?
A Camshaft Position Timing Over-Advanced or System Performance (Bank 1) This code is among the most documented for this model — tap it in the OBD2 section for the full step-by-step guide.
Are brakes problems common on the Infiniti Q45?
Yes — 25 of 197 real owner reports filed with NHTSA mention the brakes. One owner reported: “THE ABS LIGHT CAME ON DUE TO A DEFECTIVE ABS BRAKE LINE WHICH LEAKED, CAUSING THE ABS FLUID TO BECOME INOPERATIVE. PLEASE PROVIDE FURTHER INFORMATION AND VIN#. *AK…” See the owner-reported complaints section below for more.
Are engine problems common on the Infiniti Q45?
Yes — 36 of 197 real owner reports filed with NHTSA mention the engine. One owner reported: “VEHICLE HAS DEFECTIVE ABS BRAKES, LEAKS BRAKE FLUID AND BRAKE LIGHT COMES ON. THE CONSUMER HAS SPOKEN TO VARIOUS DEALERS, IT APPEARS THAT THE PROBLEM STARTED IN 1990-1992. IN MOST OF 1993 MODELS TH…” See the owner-reported complaints section below for more.
Are electrical problems common on the Infiniti Q45?
Yes — 38 of 197 real owner reports filed with NHTSA mention the electrical. One owner reported: “INFINITI, THE MANUFACTURER, ISSUED A RECALL CAMPAIGN FOR 1991 AND 1992 MODEL Q 45'S. MINE IS A 1990 MODEL, WHICH HAS ALL OF THE WARNING SIGNS OF THE FIRE DANGER INVOLVED IN THE STEREO SPEAKER RECALL …” See the owner-reported complaints section below for more.
Which OBD2 fault codes are commonly documented for the Infiniti Q45 (1990–2006)?
Commonly documented OBD2 codes across many vehicles include: P0420, P0300, P0171. Find the full description, likely causes and estimated repair costs in the OBD2 Codes section on this page.
How often should the Infiniti Q45 (1990–2006) be serviced?
Routine maintenance for the Infiniti Q45 (1990–2006) typically includes an oil change every 6,000–9,000 miles (10,000–15,000 km), an air filter every 12,000–18,000 miles (20,000–30,000 km) and a brake inspection every 12,000 miles (20,000 km). Check the full plan with specific intervals in the Scheduled Maintenance section on this page.
Bookmark this page to consult it at the workshop or when buying parts. TroubleAtlas updates its technical data continuously — check back for new information on the Infiniti Q45 (1990–2006).