The Mazda Protege, produced for the 2002 and 2003 model years under the BJ chassis code, represents a capable compact car celebrated for its engaging driving dynamics and reliable performance. Built on the Mazda BJ platform, this vehicle offers a balance of economy-conscious design with a focus on driver connection, a hallmark of Mazda's "Jinba Ittai" philosophy. Available in sedan and 5-door hatchback (Protege5) body styles, and featuring both standard 5-speed manual and optional 4-speed automatic transmissions, the Protege typically housed a 2.0L FS-DE inline 4-cylinder engine, known for its efficiency and responsiveness, with a rarer 1.5L Z5-DE also available. Its design emphasized good handling and a comfortable ride, making it a popular choice for everyday transportation. This comprehensive factory service manual provides detailed information for the maintenance, repair, and technical understanding of the 2002-2003 Mazda Protege. It covers all major systems, including engine mechanicals, fuel, ignition, exhaust, manual and automatic transmissions, drivetrain, suspension, steering, brakes, and electrical systems. Furthermore, the manual offers in-depth guidance on routine maintenance procedures, troubleshooting common and uncommon issues, detailed repair and overhaul instructions, and diagnostic techniques. With over 1500 pages of content in English, this workshop manual is an essential resource for owners, technicians, and mechanics seeking to maintain the optimal performance and longevity of their Mazda Protege. 🏷️ Basic Information Identification Make: Mazda Model: Protege Model Years: 2002, 2003 Codes Chassis Codes: BJ Platform: Mazda BJ platform 👋 Introduction Market Position Segment: Compact Car Target Audience: Economy-conscious buyers, young drivers, small families. Competitive Analysis Key Competitors: Honda Civic, Toyota Corolla, Ford Focus, Nissan Sentra. Key Features Reliability: Generally considered reliable and affordable to maintain. Driving Dynamics: Praised for good handling and a responsive chassis, especially the Mazdaspeed Protege variant. Fuel Economy: Good fuel efficiency for its class. 📋 Manual Details Coverage Areas Main Coverage: Comprehensive service, repair, and maintenance information for 2002-2003 Mazda Protege. Page Count Estimated Page Count: 1500+ Manual Type Type: Factory Service Manual / Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Engine disassembly, assembly, component inspection, timing belt/chain, piston rings, bearings, cylinder head, block, cooling system, lubrication system. Fuel System: Fuel pump, injectors, fuel rail, fuel filter, evaporative emission control (EVAP) system, fuel tank. Ignition System: Spark plugs, ignition coils, ignition timing, coil-on-plug (COP) system. Exhaust System: Exhaust manifolds, catalytic converter, mufflers, oxygen sensors. Transmission Manual: Clutch system, transmission disassembly/assembly, gear ratios, internal components, shift mechanism. Transmission Automatic: Torque converter, transmission disassembly/assembly, hydraulic control, solenoids, internal components, valve body. Drivetrain: Front-wheel drive (FWD) system, half-shafts, CV joints, differential (in transaxle). Suspension: Front struts/shocks, rear shocks, control arms, ball joints, bushings, stabilizer bars, wheel bearings, alignment specifications. Steering: Power steering system, steering rack, tie rods, steering column, alignment. Brakes: Front disc brakes, rear drum brakes (or disc on some trims), brake calipers, master cylinder, power booster, ABS system (if equipped), brake bleeding procedures. Electrical System: Battery, charging system (alternator), starting system (starter motor), lighting system (headlights, taillights, interior lights), wiring diagrams, fuses, relays. Engine Control System ECU: Engine Control Unit (ECU) diagnostics, sensors (MAP, TPS, O2, CKP, CMP), actuators, fuel injection control, idle control. Climate Control HVAC: Air conditioning system (compressor, refrigerant, evaporator, condenser), heater core, blower motor, climate controls, ducting. Body Interior: Door panels, dashboard removal, seats, headliner, carpet, trim pieces. Body Exterior: Bumpers, fenders, hood, trunk lid, doors, windows, mirrors, seals, body panel alignment. Safety Systems: Airbag system (SRS), seat belt pretensioners, diagnostics for safety systems. Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, tire rotation, spark plug replacement. Troubleshooting: Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides, DTC (Diagnostic Trouble Code) interpretation. Repair Procedures: Detailed step-by-step instructions for component removal, installation, and repair. Overhaul Procedures: Complete engine and transmission overhaul instructions, including torque specifications and critical measurements. Diagnostics: On-board diagnostics (OBD-II), sensor testing, actuator testing, circuit testing using multimeters and oscilloscopes. Calibration: Throttle body cleaning and adaptation, idle speed control adjustment. Technical Depth Depth: Comprehensive, from basic maintenance to complete engine/transmission rebuilds and advanced electrical diagnostics. 📊 Manual Specifications File Format File Type: PDF Searchable Text: Yes (typically, depending on scan quality) Print Quality Quality: Professional (designed for digital viewing, printable) Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code 1: FS-DE (2.0L DOHC) Engine Displacement 1: 1991 cc Engine Configuration 1: Inline 4-cylinder Engine Bore X Stroke 1: 83.0 mm x 92.0 mm Engine Compression Ratio 1: 9.1:1 Engine Horsepower 1: 130 hp @ 6000 rpm (approx.) Engine Torque 1: 135 lb-ft @ 4000 rpm (approx.) Engine Fuel Delivery 1: Electronic Fuel Injection (EFI) Engine Valve Train 1: DOHC (Dual Overhead Camshafts), 4 valves per cylinder Engine Timing Belt Tensioner Spec: Requires periodic inspection and replacement, critical for engine longevity. Secondary...