Target Audience:
Everyday drivers seeking reliable and fuel-efficient transportation, often families and young professionals.
Key Competitors:
Honda Civic, Toyota Corolla, Nissan Sentra, Ford Focus, Chevrolet Cavalier/Cobalt.
Value Proposition:
Offered a balance of sporty handling (especially with the 's' trim), affordability, and decent fuel economy.
Design Philosophy:
Jinba-Ittai (horse and rider as one) driving feel, emphasizing driver engagement and responsive handling.
Body Styles:
Sedan, hatchback (5-door).
Performance Variant:
Mazdaspeed Protege (though not specified for the 2004 manual, it's part of the model's broader identity).
Engine Mechanical:
Engine assembly, cylinder head, block, crankshaft, pistons, connecting rods, lubrication system, cooling system, timing system
Engine Management:
Fuel injection system (MPI), ignition system, emissions control systems (EGR, EVAP), sensors, actuators, engine control module (ECM) diagnosis and repair
Transmission Manual:
Clutch system, gearbox assembly, shift linkages, internal components, fluid specifications
Transmission Automatic:
Automatic transaxle assembly, valve body, torque converter, transmission control module (TCM) diagnosis, fluid specifications
Drivetrain:
Front-wheel drive system, axles, CV joints, differential
Suspension:
Front and rear suspension systems (e.g., MacPherson strut front, multi-link rear), springs, shock absorbers, control arms, stabilizer bars, alignment procedures
Steering:
Power steering system (hydraulic), steering rack, power steering pump, steering column, wheel alignment
Brakes:
Front and rear brake systems (disc/drum or disc/disc depending on trim), hydraulic system, ABS (Anti-lock Braking System) operation and diagnosis, parking brake
Electrical System:
Battery, charging system (alternator, regulator), starting system (starter motor), lighting system (headlights, taillights, interior), horn, power windows, power locks, mirrors, wipers, washers
Body And Chassis:
Body panel removal and installation, interior trim, exterior trim, doors, hood, trunk, bumpers, glass, chassis structure, corrosion protection
HVAC:
Heating, ventilation, and air conditioning (HVAC) system, refrigerant handling, compressor, condenser, evaporator, heater core, controls
Interior Systems:
Seats, seat belts, airbags (SRS - Supplemental Restraint System), dashboard, instrument cluster, audio system, climate controls
Maintenance:
Scheduled maintenance (oil changes, filter replacements, fluid checks/changes), spark plug replacement, belt inspection/replacement, brake pad replacement, tire rotation
Diagnostics:
Troubleshooting guides, symptom-based diagnostics, diagnostic trouble codes (DTCs), using diagnostic scan tools, electrical circuit testing
Repair:
Detailed step-by-step repair procedures for all major components and systems, including engine overhauls, transmission rebuilds, suspension component replacement, brake system repairs
Rebuilding:
Procedures for rebuilding major assemblies like engines, transmissions, and steering racks, often including specifications for machining and component replacement
Restoration:
Guidance for bringing older vehicles back to original or improved condition, including bodywork, paint, interior refurbishment, and mechanical overhauls
Wiring Diagrams:
Comprehensive electrical wiring diagrams for all vehicle systems, essential for diagnosing electrical faults
Depth Level:
Factory-level technical detail, suitable for professional technicians and advanced DIY enthusiasts
Data Accuracy:
Precise torque specifications, clearances, fluid capacities, and diagnostic data derived directly from Mazda factory specifications
Illustrations:
Detailed diagrams, schematics, and exploded views illustrating component locations and assembly procedures
Oil Change Interval:
Every 5,000 - 7,500 miles or 6-12 months, depending on driving conditions (refer to manual for specifics).
Engine Air Filter:
Inspect every 15,000 miles, replace as needed (typically every 30,000 miles).
Cabin Air Filter:
Replace annually or every 15,000 miles (if equipped).
Spark Plugs:
Replace every 60,000 - 100,000 miles (depending on plug type, e.g., Iridium).
Transmission Fluid Change:
Automatic: Every 30,000 - 50,000 miles. Manual: Inspect at 60,000 miles, replace as needed.
Coolant Replacement:
Replace every 30,000 - 50,000 miles or 2-4 years.
Engine Oil Spec:
API SN/SP or ILSAC GF-5/GF-6A, SAE 5W-20 or 5W-30 (verify owner's manual for exact recommendation).
Coolant Spec:
Mazda FL22 Long Life Coolant or equivalent (a P-HOAT type).
Brake Fluid Spec:
DOT 3 or DOT 4.
Engine Mounts:
Can degrade over time, leading to increased vibration.
Exhaust Manifold Cracks:
Some FS-DE engines experienced exhaust manifold cracking due to heat cycles.
Oil Leaks:
Valve cover gasket and oil pan gasket can be common leak points.
Suspension Components:
Worn control arm bushings, ball joints, and sway bar links are common wear items.