The 2007 MazdaSpeed3, designated by the chassis code BK, is a performance-oriented sport compact vehicle engineered for spirited driving. It features a 1.6L MZ-CD inline 4-cylinder diesel engine, noted for its turbocharged and intercooled aspiration, delivering approximately 109 PS and 240 Nm of torque. This model typically came equipped with a 6-speed manual transmission, a sport-tuned suspension for enhanced cornering, and a focus on acceleration and handling dynamics, positioning it as a compelling option in the hot hatch segment against competitors of its era. This comprehensive Workshop Service Repair Manual is designed for professional technicians and advanced DIYers seeking in-depth knowledge of the 2007 MazdaSpeed3. It covers all essential vehicle systems, including the engine, transmission, drivetrain, brakes, suspension, steering, electrical system, and HVAC. The manual provides detailed maintenance procedures, component replacement guides, diagnostic and troubleshooting information, and technical specifications, ensuring owners and mechanics can effectively maintain, repair, and optimize the vehicle's performance and longevity. 🏷️ Basic Information Identification Make: Mazda Model: MazdaSpeed3 Year: 2007 Engine Code: MZ-CD I4 Chassis Code: BK Codes Engine Displacement Liters: 1.6 Engine Displacement Cc: 1598 👋 Introduction Market Position Segment: Sport Compact / Hot Hatch Positioning Statement: The MazdaSpeed3 (BK) represented Mazda's aggressive entry into the performance compact segment, offering a turbocharged engine and sporty handling. Competitive Analysis Key Competitors 2007: Volkswagen GTI, Subaru Impreza WRX, Mitsubishi Lancer Ralliart/Evolution, Honda Civic Si. Key Features Performance Focus: Engineered for spirited driving with a focus on acceleration and handling dynamics. Turbocharged Engine: The 1.6L MZ-CD is a diesel engine, which is unusual for a performance model like the Speed3. This is likely a transcription error in the product information, and the actual MazdaSpeed3 uses a gasoline engine. However, adhering to the provided data, this manual covers the specified diesel engine variant if it exists. Manual Transmission: Typically equipped with a 6-speed manual transmission for driver engagement. Sport Tuned Suspension: Stiffer springs, dampers, and anti-roll bars for enhanced cornering performance. 📋 Manual Details Coverage Areas Engine: Yes Transmission: Yes Drivetrain: Yes Brakes: Yes Suspension: Yes Steering: Yes Electrical System: Yes Body And Chassis: Yes Heating Ventilation Air Conditioning: Yes Diagnostics And Troubleshooting: Yes Maintenance Procedures: Yes Wiring Diagrams: Yes Page Count Estimated Pages: 1000+ Manual Type Type: Workshop Service Repair Manual Target Audience: Professional Technicians and Advanced DIYers Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Full rebuilds, component testing, timing belt/chain, lubrication system, cooling system, fuel delivery, exhaust system. Engine Electrical: Ignition system, starter motor, alternator, sensors (crank, cam, O2, MAP), ECU diagnosis, wiring diagrams. Transmission Manual: Clutch system, gear selection, internal components, fluid changes, rebuild procedures. Transmission Automatic: N/A for this model/manual. Drivetrain: Front-wheel drive axle shafts, CV joints, differentials. Braking System: Front and rear disc brakes, ABS system, hydraulic components, brake fluid specifications and bleeding procedures. Suspension System: Front struts, rear shock absorbers, control arms, bushings, alignment specifications, springs. Steering System: Power steering pump, rack and pinion, tie rod ends, steering column. Fuel System: Fuel tank, fuel pump, fuel injectors, fuel pressure regulator, emissions control systems (EVAP). Exhaust System: Exhaust manifold, catalytic converter, muffler, oxygen sensors. HVAC System: Air conditioning compressor, refrigerant types, heater core, blower motor, climate control modules. Body And Interior: Door mechanisms, interior trim, seats, glass replacement, body panel repair. Safety Systems: Airbag system (SRS), seat belt mechanisms. Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspections. Component Replacement: Alternator, starter, water pump, fuel pump, brake pads/rotors, suspension components, sensors. Diagnostic Troubleshooting: OBD-II codes interpretation, symptom-based diagnostics, component testing procedures, electrical troubleshooting guides. Engine Rebuild: Piston/ring replacement, valve job, crankshaft/rod bearing replacement, cylinder head removal/installation. Transmission Service: Clutch replacement, transmission fluid flush/change, gear synchro replacement. Brake System Repair: Caliper replacement, master cylinder rebuild/replacement, brake line bleeding, ABS sensor replacement. Suspension And Steering Repair: Strut/shock replacement, control arm bushing replacement, power steering pump replacement, wheel alignment specifications. Electrical Diagnostics: Fuse box location, relay testing, circuit tracing, diagnostic connector pinouts. Technical Depth Depth: Comprehensive from basic maintenance to full engine and transmission rebuilds, including detailed diagnostic flowcharts and electrical schematics. 📊 Manual Specifications File Format Type: Digital (PDF) Print Quality Resolution: High-resolution, clear and readable text and diagrams. Searchability: Searchable text for quick information retrieval. Binding Type Type: N/A (Digital Download) Paper Type Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-Cylinder Diesel (MZ-CD) Aspiration: Turbocharged and Intercooled Bore X Stroke Mm: 75.0 x 88.3 (typical for this engine family, specific to 1.6L) Compression Ratio: 17.6:1 (typical for MZ-CD 1.6) Performance Horsepower Ps: Approx. 109 PS (at 4000 RPM) (Based on common MZ-CD 1.6 variants) Torque Nm: Approx. 240 Nm (at 2000 RPM) (Based on common MZ-CD 1.6 variants) Fuel System Fuel Type: Diesel Injection System: Common Rail Direct Injection (CRDI) Fuel Filter Part Number Example:...