MazdaMazda62004Overview/mazda/mazda6/2004/base/

2004 Mazda Mazda6

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2004 Mazda6.

Body PASSENGER CAR

The 2004 Mazda Mazda6 is a passenger-car entry that accumulated 184 owner complaints and seven recalls, with air bags standing out as the top reported concern. Within the model’s 2002–2021 complaint history, this volume places the 2004 model year well below the 2009 peak of 386 complaints yet significantly above the 2020 low of two. That positioning indicates moderate exposure to the issues that characterized the vehicle’s earlier production cycles rather than the generation’s most problematic period.

Model year202020192018201720162015201420132004

Fitment & sizes

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

From the factory this vehicle uses OE oil filter AJTM14302. 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.

Tail / brake / turnFUSEOEM · verified

OE service part numbers OEM · verified

Engine oil filterAJTM14302 alt LF0114312
Engine air filterAJ5713Z40A9U alt RF2A13Z40A9U
Spark plugAJTT18110 alt L84518110
Front wiper bladesGK2C67330A alt GK2A67330A
Serpentine beltAJ5715908 alt AJ5715909A
ThermostatAJ5715171A alt 9XB06807S
Cabin air filterGK3J61148 alt GK3J61B03

Performance & power Independent road tests

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

Independent road tests for the Mazda6 of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

6.4–8.6 sec0–60 mph (tested)quickest 6.40 sec — 2003 s V6 Sedan
YearTrim / engine0–60¼ mileHPDrivetrain
2003s V6 Sedan 3.0L V66.40 sec15.10 sec220 hpFWD
2003s V6 Sedan 3.0L V66.80 sec15.40 sec220 hpFWD
2003s V6 Sedan 3.0L V67.00 sec15.30 sec220 hpFWD
2003i Sedan 2.3L I-47.90 sec16.40 sec160 hpFWD
2003s V6 Sedan 3.0L V68.10 sec16.30 sec220 hpFWD
2003i Sedan 2.3L I-48.60 sec16.35 sec160 hpFWD
2005s Sport Wagon 3.0L V67.20 sec15.70 sec220 hpFWD

Service quick specs OEM factory data

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

Torque the oil drain plug to 22.0-29.0 ft-lbs. The firing order is 1-2-3-4-5-6. 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 FluidATF
Automatic Transmission Fluid Capacity8
Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity8.6
Manual Transmission Fluid75W-90 · GL-4
Manual Transmission Fluid Capacity6.1
Manual Transmission Fluid75W-90 · GL-4
Manual Transmission Fluid Capacity6

Engine torques

Crankshaft Pulley and/or Damper Bolts71 ft-lbs
Engine Oil Pan Drain Plug22.0-29.0 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Cylinder Firing Order1-2-3-4-5-6
Curb Idle Speed (No Load)650 rpm
Curb Idle Speed Variance (No Load)50 rpm
Spark Plug Gap0.049-0.053 in
Spark Plug Torque11.0 ft-lbs
Spark Plug Gap0.052-0.055 in
Spark Plug Torque11.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.05-1.16 lbs
Oil TypeGU10
Oil Capacity5.07 oz

Service checks

Pressure Test18 psi
Radiator Cap Pressure Relief16-20 psi
Thermostat Opening Temperature176-183 °F
Pressure Test16 psi
Radiator Cap Pressure Relief14-18 psi
Thermostat Opening Temperature188-193 °F
Injector Primary Resistance11.4-12.6 @ 68 degreesF ohms
Engine Compression145-207 psi

Brakes

Torque Caliper to Bracket58-75 ft-lbs / 28-36 ft-lbs
Torque to Knuckle65-87 ft-lbs / 38-49 ft-lbs
Rotor Max Parallel Variation0.0005 in
Rotor Runout Limit0.0008 in
Rotor Minimum Machining0.94 in / 0.35 in
Rotor Discard at or Under0.91 in / 0.315 in

Multi-step torque procedures OEM · verified

Cylinder Head — tightening sequence 5 stages

Prep B Series, Use new bolts.

144 ft. lbs.44 ft. lbs
211 ft. lbs.11 ft. lbs
333 ft. lbs.33 ft. lbs
490 degrees.90 degrees
590 degrees.90 degrees

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 every 75,000 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 miBody Lock Cylinders (lubricate) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Hood Latch (lubricate) · Tire & Wheel Assembly (rotate)
Every 15,000 miBrake System (inspect)
Every 25,000 miCabin Air Filter (replace)
Every 30,000 miAxle Shaft Oil Seal (inspect) · Brake Line (inspect) · CV Joint Boot (inspect) · Engine Coolant System (drain, flush & refill) · Engine Coolant System (leak inspection) · Fuel Line (inspect)
Every 37,500 miAccessory Drive Belt (inspect) · Engine Air Filter Element (replace)
Every 45,000 miExhaust System Heat Shield (inspect)
Every 60,000 miEmission Control System (inspect)
Every 75,000 miEngine Valves (inspect valve lash) · Spark Plugs (replace)
At 105,000 miEngine Coolant System (drain, flush & refill)

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 Mazda Mazda6 sits near the peak of the first-generation's early complaint arc, with 184 federal complaints—slightly higher than the 175 recorded in 2003 and notably above the 153 in 2005. Recalls for 2004 total seven, a slight decrease from nine in 2003 but higher than the six issued in 2005, while investigations remained steady at three. The data indicates air bags are the dominant concern for this model year, accounting for 53 complaints, followed by engine and engine cooling (19) and power train (14); the dataset does not specify root causes for these issues. Across the generation, complaint volume remained elevated from 2003 through 2009 before declining, suggesting 2004 falls within a period of persistent, high-volume reporting rather than a transient spike. With 17 crash complaints and 5 fire complaints on record, the 2004 model year carries above-average risk relative to the quieter later years of the generation. Given its position at the crest of the generation's early complaint trend and the concentration of air bag reports, this is not an ideal year to purchase unless the specific vehicle has documented proof that all recalls and air bag service actions have been completed.

7
Open recalls
NHTSA campaigns
218
Service bulletins
Manufacturer communications
3
ODI investigations
Office of Defects Investigation
184
Owner complaints
17 involved a crash · 5 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 184 complaints on record, top 8 components.

Air Bags53
Engine & Engine Cooling19
Power Train14
Structure11
Electrical System7
Service Brakes, Hydraulic7
Exterior Lighting6
Latches/Locks/Linkages6

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 7 campaigns on record for this vehicle.

18V402000Air Bags:Frontal:Passenger Side:Inflator ModuleReported 15/06/2018

Mazda North America Operations (Mazda) is recalling certain 2003-2008 Mazda6, 2006-2007 Mazdaspeed6 and 2004 MPV vehicles nationwide. Mazda is also recalling 2005-2006 MPV vehicles in Alabama, Arizona, Arkansas… Remedy: Owners are advised not to drive their vehicles until the remedy is performed. Mazda will notify owners, and dealers will replace the front passenger air bag inflator with an…

19V781000Air Bags:Frontal:Passenger Side:Inflator ModuleReported 31/10/2019

Mazda North American Operations (Mazda) is recalling certain 2003-2008 Mazda6, 2004-2005 MPV, 2004 RX-8, and 2006-2007 Mazdaspeed6 vehicles. These vehicles had their passenger frontal air bag inflators previously… Remedy: Owners are advised not to drive their vehicles until the remedy is performed. Mazda will notify owners, and dealers will replace the front passenger air bag inflator with an…

Technical service bulletins NHTSA · verified

Showing 5 of 218 bulletins on record with NHTSA.

BulletinDateComponentSummary
SA-029-262026-04-21Power TrainThis Service Alert supersedes the previously issued SA listed below: The changes are…
07-004-25a2025-12-10Unknown Or OtherA musty/mildew type odor may come from the vents when the air conditioning (A/C) system…
SA-039/252025-08-21StructureSome vehicles may experience exterior trim heat damage such (melted, separating, etc.)…
SA-036-252025-08-14Unknown Or OtherWhen replacing the SiriusXM satellite radio unit, a call must be made to inform SiriusXM…
SA-032-252025-06-18Unknown Or OtherSome customers may complain about a noisy HVAC blower motor or odor after a cabin air…

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

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VIN
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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.

Reference guides

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

Frequently asked

Does the 2004 Mazda6 have open recalls?

NHTSA lists 7 recall campaign(s) for this model year. Check your specific vehicle by VIN.