MazdaProtege/Mazdaspeed Protege2003Overview/mazda/protege-mazdaspeed-protege/2003/base/

2003 Mazda Protege/Mazdaspeed Protege

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

Body PASSENGER CAR

The 2003 Mazda Protege, also sold as the Mazdaspeed Protege, is a passenger car built on the Protege platform and documented in a single overview. Owner reports cite 121 complaints, most concentrated in the engine and cooling systems, and the model was recalled four times, highlighting these mechanical concerns. Within its generation, the 2003 Protege’s reliability shows a moderate level of reported problems, suggesting that while generally serviceable, its powerplant demanded particular attention from owners.

Fitment & sizes

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

From the factory this vehicle uses OE oil filter B6Y114302A. 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 filterB6Y114302A
Engine air filterB59513Z40A9U
Fuel filterGY0113ZE0
Spark plug000018BP01 alt 000018BP03
Serpentine beltFS1218381A alt FS1215909A
ThermostatKL0115171A9U

Service quick specs OEM factory data

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

The firing order is 1-3-4-2.

Lubricants & capacities

Power Steering FluidATF

Ignition

Cylinder Firing Order1-3-4-2
Spark Plug Gap0.049-0.053 in
Spark Plug Torque11.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.16 lbs
Oil TypeGU10
Oil Capacity5.07 oz

Service checks

Pressure Test18 psi
Radiator Cap Pressure Relief14-18 psi
Thermostat Opening Temperature176-183 °F
Key ON Engine OFF (KOEO)35-65
Engine Compression119-171 psi

Brakes

Brake ApplicationWITH REAR DISC / WITH STANDARD
Torque Caliper to Bracket33-35 ft-lbs / 58-75 ft-lbs
Torque to Knuckle34-49 ft-lbs / 66-86 ft-lbs
Brake ApplicationWITH REAR DISC / WITH STANDARD
Torque Caliper to Bracket33-35 ft-lbs / 58-75 ft-lbs
Torque to Knuckle34-49 ft-lbs / 66-86 ft-lbs
Brake ApplicationWITH REAR DISC / WITH STANDARD
Rotor Runout Limit0.002 in

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; coolant at 45,000 mi. The big-interval services (at 45,000 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 Latches, Locks & Hinges (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Weatherstrip Seal (inspect)
Every 30,000 miAccessory Drive Belt (inspect) · Axle Shaft Oil Seal (inspect) · Brake Drum Assembly (inspect) · Brake System (inspect) · CV Joint Boot (inspect) · Engine Air Filter Element (replace)
At 45,000 miEngine Coolant System (drain, flush & refill)
Every 60,000 miEngine Valves (inspect valve lash)
At 105,000 miTiming Belt (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.

Owner complaints about the 2003 Mazda Protege/Mazdaspeed Protege lead in one area — the engine & engine cooling, 31 of 121 reports (26%), well ahead of the next concern. None of this vehicle's 4 recall campaigns target the engine & engine cooling, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 16 of the reports describe a crash and 2 a fire — a small share of the total, but worth weighing against the engine & engine cooling pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

4
Open recalls
NHTSA campaigns
96
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
121
Owner complaints
16 involved a crash · 2 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★

Owner complaints filed with NHTSA, by component

All 121 complaints on record, top 8 components.

Engine & Engine Cooling31
Seat Belts15
Air Bags10
Power Train9
Engine6
Tires5
Suspension4
Exterior Lighting3

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 4 campaigns on record for this vehicle.

09E012000Exterior LightingReported 07/04/2009

SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE… Remedy: SABERSPORT WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT COMBINATION LAMPS. THE SAFETY RECALL BEGAN ON MAY 11, 2009. OWNERS MAY CONTACT SABERSPORT AT…

09E025000Exterior Lighting:HeadlightsReported 11/05/2009

DOPE, INC. IS RECALLING 42,540 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE… Remedy: DOPE, INC. WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT COMBINATION LAMPS. THE SAFETY RECALL BEGAN ON JULY 28, 2009. OWNERS MAY CONTACT DOPE, INC. AT…

Technical service bulletins NHTSA · verified

Showing 5 of 96 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…
07-004-252025-04-25Unknown Or OtherA musty/mildew type odor may come from the vents when the air conditioning (A/C) system…
09-038-242024-08-08Electrical SystemIn accordance with Federal regulations, follow the procedure listed below when replacing…
SA-011-24b2024-07-29Unknown Or OtherMazda has developed factory recommended scheduled maintenance services that support all…

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 Protege/Mazdaspeed Protege. 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.

Reference guides

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

Frequently asked

Does the 2003 Protege/Mazdaspeed Protege have open recalls?

NHTSA lists 4 recall campaign(s) for this model year. Check your specific vehicle by VIN.