The 2007 MazdaSpeed 3, part of the first generation BK chassis, represents a compelling fusion of performance and practicality, engineered for enthusiasts. Building on Mazda's heritage of creating engaging driving experiences, this hot hatch features a potent 2.3-liter turbocharged MZR DISI engine delivering 263 horsepower and 280 lb-ft of torque, coupled with a precise 6-speed manual transmission and a standard limited-slip differential. Its sport-tuned suspension, powerful braking system, and aggressive styling distinguish it within the performance compact segment, offering a thrilling yet usable package for daily driving and spirited excursions. This comprehensive workshop service repair manual is designed to provide professional technicians and enthusiasts with the in-depth knowledge required for the maintenance, diagnosis, and repair of the 2007 MazdaSpeed 3. Covering all major systems from the engine mechanicals and management to the transmission, brakes, suspension, steering, and electrical systems, this manual details routine maintenance procedures, troubleshooting common issues, and complex repair operations. With approximately 2500+ pages of detailed information, including diagrams, specifications, and diagnostic flowcharts, it serves as an essential resource for ensuring the optimal performance and longevity of your vehicle. 🏷️ Basic Information Identification Make: Mazda Model: MazdaSpeed 3 Year: 2007 Chassis Code: BK Codes Engine Code: L3-VDT 👋 Introduction Market Position Positioning: The 2007 MazdaSpeed 3 (BK generation) was a highly regarded hot hatch, known for its potent turbocharged engine, sharp handling, and practical hatchback design, targeting enthusiasts seeking performance and everyday usability. Competitive Analysis Competitors: Competed with vehicles like the Volkswagen GTI, Subaru WRX, and Mitsubishi Lancer Ralliart, offering a strong value proposition in the performance compact segment. Key Features Performance Highlights: Turbocharged MZR DISI engine, close-ratio 6-speed manual transmission, sport-tuned suspension, powerful brakes, aggressive styling. 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service Repair Manual Target Audience: Professional Technicians and Enthusiasts Page Count Estimated Pages: Approximately 2500+ Manual Type Type: Comprehensive Service and Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, cylinder head, pistons, connecting rods, crankshaft, timing system, lubrication system, cooling system, fuel injection system (direct injection), turbocharger system. Engine Management: ECU, sensor diagnostics (MAP, MAF, O2, knock, crank/cam position), actuator control (injectors, ignition coils, turbo wastegate), emissions control, diagnostics, troubleshooting. Transmission: Manual transmission (MZR-CDT-based 6-speed), clutch system, gearbox overhaul, shift mechanism, differential, driveline components (CV joints, driveshafts). Brakes: Front and rear brake systems (including larger calipers and rotors for Speed 3), ABS, EBD, DSC (Dynamic Stability Control), brake fluid bleeding, component replacement, troubleshooting. Suspension: Front struts, rear multi-link suspension, control arms, sway bars, bushings, shock absorbers, springs, alignment specifications. Steering: Power steering system (hydraulic), steering rack, tie rods, steering column, alignment. Electrical System: Battery, charging system (alternator), starting system (starter motor), lighting, ignition system, fuses, relays, wiring diagrams, instrument cluster, body control module (BCM). HVAC: Air conditioning system, heater core, blower motor, climate control unit, refrigerant R134a, component diagnostics. Body And Interior: Exterior body panels, doors, hood, trunk, bumpers, interior trim, seats, airbags, safety restraints. Chassis: Unibody construction, chassis components, structural integrity. Procedures Included Maintenance: Oil changes, filter replacements, spark plug replacement, coolant flushes, brake fluid changes, belt inspections and replacement, air filter replacement. Troubleshooting: Diagnostic fault codes (DTCs), symptom-based diagnostics, electrical circuit testing, mechanical component testing, common problem resolutions. Repair: Component removal and installation, engine rebuild procedures, transmission overhaul, brake caliper replacement, suspension component replacement, body panel repair, electrical component repair. Diagnostics: OBD-II scanning, live data analysis, component actuation tests, wiring diagram interpretation. Specifications: Torque specifications for all fasteners, clearance measurements, fluid capacities, alignment angles, diagnostic parameter specifications. Technical Depth Depth: Comprehensive, covering everything from routine maintenance to complete engine and transmission rebuilds. Detailed diagnostic procedures for all major systems. 📊 Manual Specifications File Format Format: PDF Searchability: Searchable text for quick access to information. Print Quality Quality: High-resolution scans of original factory documentation. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, turbocharged and intercooled, direct injection (DISI) Engine Code: L3-VDT Displacement: 2.3 Liters (2261 cc) Performance Horsepower: 263 hp @ 5500 RPM Torque: 280 lb-ft @ 3000 RPM Redline: 6500 RPM Fuel System Fuel Delivery: Direct Injection (DISI) with high-pressure fuel pump Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Engine Components Turbocharger Details: Garrett GT2554R or similar, with intercooler 🔧 Transmission Standard Type: 6-Speed Manual Transmission Optional Type: None Features Gear Ratios: Detailed ratios available in the manual (e.g., 1st: 3.73, 2nd: 2.15, 3rd: 1.46, 4th: 1.12, 5th: 0.92, 6th: 0.76, Reverse: 3.50) Differential: Limited-Slip Differential (LSD) standard Fluid Specs Transmission Fluid Type: GL-4 SAE 75W-90 (Mazda recommended or equivalent) 📐 Dimensions Exterior Length: 177.7 inches (4513 mm) Width: 70.1 inches (1780 mm) Height: 57.7 inches (1465 mm) Wheelbase: 104.7 inches (2659 mm) Track Width Front: 60.4 inches (1535 mm) Track Width Rear: 60.2...