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2004 Infiniti Q45

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2004 Q45.

Body PASSENGER CARTransmission Automatic (S5)

The 2004 Infiniti Q45 is a full-size passenger car built around a five-speed automatic transmission, with EPA fuel economy of 16 city, 22 highway, and 18 combined mpg, and a 5.9-quart 5W-30 API SL oil specification defining its service baseline. Within the model's broader 1990–2006 complaint history — which spans a peak of 47 owner complaints in 1991 down to a low of just 2 in 1993 — the 2004 model year registers only 7 total complaints, placing it near the quiet end of the lineup's track record. The presence of 2 recalls and a concentration of issues around vehicle speed control tempers that showing somewhat, but for researchers mapping reliability trends across the Q45's production run, 2004 stands as one of its more dependable chapters.

Model year2006 2005 2004 2003 2002 2001 1999 1998 1997

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity5.9 qtOEM · verified

Engine oil type5W-30 API SLOEM · verified

Lug nut torque72-87 ft-lbsOEM · verified

EPA fuel economy16/22/18 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 24F · 585 CCA battery, OE oil filter 152089E01A. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 24F · 585 CCAOEM · verified

Tire sizeP225-55VR17OEM · verified

Wheel / rim7.5-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	152089E01A
Engine air filter	16546AR000
Fuel filter	1640041B1A
Spark plug	224015M016 alt 224015M014
Front wiper blades	28890JM00A alt 28890AR205
Thermostat	212001LA1A alt 212306N20A
Cabin air filter	27277VX00A

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

Transmission

Automatic (S5)

Dimensions & weight NHTSA vPIC

Overall length	199.6 in
Overall width	72.4 in
Overall height	58.7 in
Wheelbase	113 in
Curb weight	3977 lb
Track (front / rear)	61.8 / 61 in
Weight distribution (front / rear)	53/47

Ratings & economy EPA / vPIC

EPA city / highway / combined	16 / 22 / 18 mpg
Drivetrain	Rear-Wheel Drive
Passenger volume	102 cu ft
Cargo volume	14 cu ft
Recommended fuel	Premium Gasoline

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the Q45 of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

6.0–6.6 sec0–60 mph (tested)quickest 6.00 sec — 2002 Sedan

Year	Trim / engine	0–60	¼ mile	HP	Drivetrain
2002	Sedan 4.5L V8	6.00 sec	14.50 sec	340 hp	RWD
2002	Sedan 4.5L V8	6.60 sec	15.80 sec	340 hp	RWD

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 5.9 qt of 5W-30 API SL engine oil, 80W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 72-87 ft-lbs, the oil drain plug to 28.0 ft-lbs. The firing order is 1-8-7-3-6-5-4-2. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Automatic Transmission Fluid	ATF
Automatic Transmission Fluid Capacity	10.9
Brake Fluid	DOT 3
Differential Gear Oil	80W-90 · GL-5
Differential Gear Oil Capacity	3 Pints
Engine Oil	5W-30 · API
Engine Oil Capacity	5.9 qt
Power Steering Fluid	ATF

Engine torques

Engine Flywheel Bolts	62-68 ft-lbs
Engine Oil Pan Drain Plug	28.0 ft-lbs

Chassis torques

Lug Nuts	72-87 ft-lbs
Front Wheel Hub	181 ft-lbs
Rear Wheel Hub	177 ft-lbs

Ignition

Cylinder Firing Order	1-8-7-3-6-5-4-2
Curb Idle Speed (No Load)	650 rpm
Curb Idle Speed Variance (No Load)	50 rpm
Spark Plug Gap	0.043 in
Spark Plug Torque	18.0 ft-lbs
Ignition Timing	17, Not adjustable degrees
Ignition Timing Acceptable Variance	5 degrees
Ignition Timing Reference RPM	Idle rpm

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	1.32 lbs
Oil Group	PAG
Oil Type	46
Oil Capacity	6.00 oz
Standard BCI Group Number	24F
Standard BCI Cranking Performance	585 cca

Service checks

Regulated Fuel System Pressure (Without Vacuum)	51.0 psi
Engine Compression	164-191 PSI. 14 maximum variation PSI.
Engine Oil Pressure	14
Intake Valve Lash	Hydraulic in
Exhaust Valve Lash	Hydraulic in

Brakes

Torque Caliper to Bracket	102-122 ft-lbs / 25-36 ft-lbs
Torque to Knuckle	72-87 ft-lbs / 29-37 ft-lbs
Minimum Pad Thickness	Front: 0.079; Rear: 0.079 in
Rotor Max Parallel Variation	0.0006 in
Rotor Runout Limit	0.0028 in
Rotor Nominal Thickness From	1.1 in / 0.63 in
Rotor Nominal Thickness To	1.1 in / 0.63 in
Rotor Minimum Machining	1.024 in / 0.55 in

Multi-step torque procedures OEM · verified

Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 1 stages

Bolts 9-10

1.4 ft. lbs

Connecting Rod (Large End) Bearings — tightening sequence 1 stages

11 ft. lbs., Step 2: 60

11 ft. lbs

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages

65-72 ft. lbs., step 2: 90-96

65–72 ft. lbs

Cylinder Head — tightening sequence 4 stages

1	72.0 ft. lbs.	72 ft. lbs
2	Loosen all bolts completely in order.
3	33.0 ft. lbs.	33 ft. lbs
4	60 degrees	60 degrees

Main Bearings — tightening sequence 1 stages

Bolts 1-10

29 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs at 105,000 mi; coolant every 30,000 mi. The big-interval services (every 30,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 7,500 mi	Engine Oil (drain & refill) · Engine Oil Filter (replace)
Every 15,000 mi	Cabin Air Filter (replace) · Transmission Assembly (inspect fluid level)
Every 30,000 mi	Engine Air Filter Element (replace) · Engine Coolant System (drain, flush & refill) · Temperature Controlled Seat Air Filter (replace)
At 60,000 mi	Engine Coolant System (drain, flush & refill)
At 105,000 mi	Spark Plugs (replace)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2004 Infiniti Q45 sits within the third generation (2002–2006), where complaints peaked at 22 in 2002 and then steadily declined to zero by 2006. The target year’s 7 complaints represent a sharp drop from the 14 in 2003 and align with the generation’s improving reliability arc, while its 2 recalls and 2 investigations are slightly elevated compared to the single recall in 2002–2003 but lower than the 3 recalls in 2005. TSBs also fell from a high of 112 in 2002 to 54 in 2004, indicating fewer service bulletins as the generation matured. With no crash or fire complaints and only minor reported issues like vehicle speed control, the data suggests the 2004 model year is a relatively trouble-free point in the Q45’s lifecycle. This is a good year to buy, offering low complaint volume and a mature design without the higher recall activity seen in the following year.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

0 involved a crash · 0 a fire

Owner complaints by model year NHTSA · this generation & adjacent

’90 ’91 ’92 ’93 ’94 ’95 ’96 ’97 ’98 ’99 ’00 ’01 ’02 ’03’04’05 ’06

Owner complaints filed with NHTSA, by component

All 7 complaints on record, top 6 components.

Vehicle Speed Control2

Steering,Structure1

Engine1

Steering,Electrical System,Engine1

Electrical System,Exterior Lighting1

Service Brakes, Hydraulic,Electrical System,Exterior Lighting,Seats1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 2 campaigns on record for this vehicle.

12V079000Air Bags:Side/WindowReported 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. 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…

04V497000Exterior Lighting:Brake Lights:SwitchReported 13/10/2004

ON CERTAIN PASSENGER VEHICLES, THE BRAKE LAMP SWITCH MAY MALFUNCTION. Remedy: DEALERS WILL REPLACE THE BRAKE LAMP SWITCH. THE RECALL BEGAN ON OCTOBER 25, 2004. OWNERS SHOULD CONTACT INFINITI AT 1-800-662-6200.

Technical service bulletins NHTSA · verified

Showing 5 of 54 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
ITB09-063C	2026-04-13	Structure	CERTIFICATION LABEL AND VIN PLATE REPLACEMENT SERVICE INFORMATION Because of collision…
ITB13-052E	2024-05-20	Electrical System	INTELLIGENT KEY NOT DETECTED / ENGINE WILL NOT START This bulletin has been amended. See…
ITB17-009H	2024-04-29	Visibility/Wiper	WINDOW GLASS WARRANTY INFORMATION This bulletin has been amended. See AMENDMENT HISTORY…
ITB13-007I	2024-04-29	Visibility/Wiper	REMOVING FOREIGN MATERIAL FROM THE WINDOW GLASS This bulletin has been amended. See…
ITB09-039K	2024-04-29	Visibility/Wiper	WINDSHIELD CRACKING This bulletin has been amended. See AMENDMENT HISTORY on the last…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420

Catalyst system efficiency below threshold — Bank 1

P0300

Random / multiple cylinder misfire detected

P0171

System too lean — Bank 1

P0455

Evaporative emission system leak detected — large leak

P0128

Coolant thermostat below regulating temperature

P0442

Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN

Decode a VIN to confirm the transmission and build data for a specific Q45. OEM

Build data

Plant, GVWR class, engine and body data for any 17-character VIN.

Recalls

Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group 24F battery Vehicles taking 5.9 qt Engine oil filter 152089E01A Engine air filter 16546AR000 Fuel filter 1640041B1A Spark plug 224015M016

Reference guides

Cross-vehicle references for the kinds of data on this page.

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 2004 Q45 take?

5.9 qt of 5W-30 API SL, per the factory manual.

Does the 2004 Q45 have open recalls?

NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Q45 get?

EPA figures are 16 city / 22 highway / 18 combined mpg.