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2003 Mazda Mazda6

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2003 Mazda6.

Body PASSENGER CAR

The 2003 Mazda6 entered the market as a passenger car carrying 175 owner complaints, 9 recalls, and air bags as its most-cited problem area — a profile that anchors the opening of the nameplate's two-decade reliability record. Plotted against the 2002–2021 model range, that inaugural total sits well below the 386 complaints tallied in 2009, the model's worst year, and far above the 2 complaints recorded in 2020, its quietest. The upshot for a researcher is that this early entry fell squarely in the middle of the Mazda6's complaint history rather than at either extreme, suggesting that while air bag concerns defined its own owner experience, the bulk of the nameplate's reliability baggage would accumulate later.

Model year2020 2019 2018 2017 2016 2015 2014 2013 2003

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 filter	AJTM14302 alt LF0114312
Engine air filter	AJ5713Z40A9U alt RF2A13Z40A9U
Spark plug	AJTT18110 alt L84518110
Front wiper blades	GK2C67330A alt GK2A67330A
Serpentine belt	AJ5715908 alt AJ5715909A
Thermostat	AJ5715171A alt 9XB06807S
Cabin air filter	GK3J61148 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

Year	Trim / engine	0–60	¼ mile	HP	Drivetrain
2003	s V6 Sedan 3.0L V6	6.40 sec	15.10 sec	220 hp	FWD
2003	s V6 Sedan 3.0L V6	6.80 sec	15.40 sec	220 hp	FWD
2003	s V6 Sedan 3.0L V6	7.00 sec	15.30 sec	220 hp	FWD
2003	i Sedan 2.3L I-4	7.90 sec	16.40 sec	160 hp	FWD
2003	s V6 Sedan 3.0L V6	8.10 sec	16.30 sec	220 hp	FWD
2003	i Sedan 2.3L I-4	8.60 sec	16.35 sec	160 hp	FWD
2005	s Sport Wagon 3.0L V6	7.20 sec	15.70 sec	220 hp	FWD

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

Power Steering Fluid

ATF

Engine torques

Engine Oil Pan Drain Plug

22.0-29.0 ft-lbs

Ignition

Cylinder Firing Order	1-3-4-2
Cylinder Firing Order	1-2-3-4-5-6
Spark Plug Gap	0.049-0.053 in
Spark Plug Torque	11.0 ft-lbs
Spark Plug Gap	0.052-0.055 in
Spark Plug Torque	11.0 ft-lbs
Ignition Timing	10, Not adjustable degrees
Ignition Timing Acceptable Variance	2 degrees

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	1.05-1.16 lbs
Oil Type	GU10
Oil Capacity	5.07 oz

Service checks

Pressure Test	18 psi
Radiator Cap Pressure Relief	16-20 psi
Thermostat Opening Temperature	176-183 °F
Pressure Test	16 psi
Radiator Cap Pressure Relief	14-18 psi
Thermostat Opening Temperature	188-193 °F
Engine Compression	145-207 psi
Engine Oil Pressure	57-94 psi

Brakes

Torque Caliper to Bracket	58-75 ft-lbs / 28-36 ft-lbs
Torque to Knuckle	65-87 ft-lbs / 38-49 ft-lbs
Rotor Max Parallel Variation	0.0005 in
Rotor Runout Limit	0.0008 in
Rotor Minimum Machining	0.94 in / 0.35 in
Rotor Discard at or Under	0.91 in / 0.315 in

Multi-step torque procedures OEM · verified

Cylinder Head — tightening sequence 5 stages

Prep B Series, Use new bolts.

1	44 ft. lbs.	44 ft. lbs
2	11 ft. lbs.	11 ft. lbs
3	33 ft. lbs.	33 ft. lbs
4	90 degrees.	90 degrees
5	90 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 mi	Body Lock Cylinders (lubricate) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Hood Latch (lubricate) · Tire & Wheel Assembly (rotate)
Every 15,000 mi	Brake System (inspect)
Every 25,000 mi	Cabin Air Filter (replace)
Every 30,000 mi	Axle Shaft Oil Seal (inspect) · Body Fasteners (torque) · Brake Line (inspect) · CV Joint Boot (inspect) · Engine Coolant System (drain, flush & refill) · Engine Coolant System (leak inspection)
Every 37,500 mi	Accessory Drive Belt (inspect) · Engine Air Filter Element (replace)
Every 45,000 mi	Exhaust System Heat Shield (inspect)
Every 60,000 mi	Emission Control System (inspect)
Every 75,000 mi	Spark Plugs (replace)
At 105,000 mi	Engine 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.

In 2003 the Mazda 6 saw a dramatic jump in federal complaints, rising from 28 in 2002 to 175—a six‑fold increase that also coincided with the highest recall count of the early‑generation span (9 recalls, compared with 1–7 in surrounding years). Investigations peaked at four, far above the typical three or fewer seen before and after, while technical service bulletins (TSBs) surged to 209, the second‑largest figure until the later spike in 2014. The top complaint categories that year were Air Bags (27), Power Train (21), Engine & Engine Cooling (16) and Service Brakes (13), and there were 11 crash‑related and 2 fire‑related complaints. This pattern indicates that 2003 was an outlier year with elevated safety‑related issues, suggesting extra diligence (e.g., verifying Air‑bag repairs and power‑train service history) is needed; otherwise, the model may be riskier than adjacent model years.

Open recalls

NHTSA campaigns

209

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

175

Owner complaints

11 involved a crash · 2 a fire

NHTSA crash-test rating federal NCAP · out of 5 stars

Rollover★★★★★

Owner complaints by model year NHTSA · this generation & adjacent

’02’03’04 ’05 ’06 ’07 ’08 ’09 ’10 ’11 ’12 ’13 ’14 ’15 ’16 ’17 ’18 ’19 ’20 ’21

Owner complaints filed with NHTSA, by component

All 175 complaints on record, top 8 components.

Air Bags27

Power Train21

Engine & Engine Cooling16

Service Brakes, Hydraulic13

Electrical System9

Structure7

Suspension7

Vehicle Speed Control6

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 9 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 209 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
SA-029-26	2026-04-21	Power Train	This Service Alert supersedes the previously issued SA listed below: The changes are…
07-004-25a	2025-12-10	Unknown Or Other	A musty/mildew type odor may come from the vents when the air conditioning (A/C) system…
SA-036-25	2025-08-14	Unknown Or Other	When replacing the SiriusXM satellite radio unit, a call must be made to inform SiriusXM…
SA-032-25	2025-06-18	Unknown Or Other	Some customers may complain about a noisy HVAC blower motor or odor after a cabin air…
07-004-25	2025-04-25	Unknown Or Other	A musty/mildew type odor may come from the vents when the air conditioning (A/C) system…

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 Mazda6. 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.

Engine oil filter AJTM14302 Engine air filter AJ5713Z40A9U Spark plug AJTT18110 Front wiper blades GK2C67330A

Reference guides

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

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

Frequently asked

Does the 2003 Mazda6 have open recalls?

NHTSA lists 9 recall campaign(s) for this model year. Check your specific vehicle by VIN.