The MazdaSpeed3, a performance-oriented compact hatchback, was first introduced in 2006 as the inaugural generation (BK) of Mazda's sporty Mazda3 variant. This model is powered by a 2.3-liter MZR DISI Turbo engine, generating 263 horsepower and 280 lb-ft of torque, paired with a 6-speed manual transmission. Known for its sport-tuned suspension, aggressive styling, and engaging driving dynamics, the MazdaSpeed3 was positioned as a compelling choice for enthusiasts seeking a practical yet high-performance daily driver, earning a spot on Car and Driver's 10Best list in 2007. It was assembled in Hofu, Yamaguchi, Japan. This comprehensive Workshop Service Repair Manual provides detailed information for the complete service and repair of the MazdaSpeed3 (BK1). It covers all major vehicle systems, including engine mechanicals, cooling, lubrication, fuel injection, ignition, turbocharging, emissions control, manual transmission, clutch system, driveline, brake systems, suspension, steering, and electrical systems. The manual includes step-by-step repair procedures, diagnostic troubleshooting charts, maintenance schedules, technical specifications, and torque values, making it an essential resource for owners and professional technicians alike to ensure the optimal performance and longevity of the vehicle. 🏷️ Basic Information Identification Make: Mazda Model: MazdaSpeed3 Model Variant: MazdaSpeed3 Model Year: 2006 Chassis Code: BK1 Generation Generation: 1st Generation (BK) Codes Engine Code Primary: MZR DISI Turbo L3-VDT 👋 Introduction Market Position Market Position: Performance-oriented compact hatchback, positioned as a sporty alternative to mainstream models Competitive Analysis Key Competitors: Volkswagen GTI, Subaru WRX, Honda Civic Si, Mitsubishi Lancer Ralliart Key Features Performance Focus: Turbocharged engine, sport-tuned suspension, aggressive styling Target Audience Target Audience: Enthusiasts seeking a practical yet high-performance daily driver 📋 Manual Details Coverage Areas Coverage Areas: Complete vehicle service and repair Page Count Estimated Page Count: Approx. 2500+ pages (typical for comprehensive workshop manuals) Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical, cooling, lubrication, fuel injection, ignition, turbocharging, emissions control Transmission Systems: Manual transmission (MT) service, clutch system, driveline, axles Brake Systems: Hydraulic brake system, ABS, parking brake Suspension Steering: Front and rear suspension, steering system, power steering Electrical Systems: Wiring diagrams, starter, charging system, lighting, body electrical, instrument cluster, HVAC controls Body Chassis: Body panels, doors, glass, interior trim, exterior trim, chassis components HVAC Systems: Heating, Ventilation, and Air Conditioning (HVAC) system components and diagnosis Safety Systems: Airbag system, seat belts Procedures Included Diagnostic Procedures: Troubleshooting charts, symptom-based diagnostics, DTC (Diagnostic Trouble Code) interpretation Maintenance Procedures: Scheduled maintenance, fluid changes, filter replacements, tune-ups Repair Procedures: Step-by-step disassembly and reassembly instructions for all major components Component Overhaul: Detailed procedures for engine, transmission, and differential overhaul Specification Adjustments: Torque specifications, alignment procedures, valve clearances (if applicable) Technical Depth Technical Depth: Comprehensive, suitable for professional technicians and advanced DIYers Diagnostic Tools Required: Information on required scan tools, specialized tools, and diagnostic equipment 📊 Manual Specifications File Format File Format: PDF (Portable Document Format) Print Quality Print Quality: High-resolution scans, printable pages, searchable text Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Inline-4, turbocharged, direct-injection Displacement: 2.3 Liters (2261 cc) Bore X Stroke: 87.5 mm x 94.0 mm Compression Ratio: 8.5:1 Valve Train: DOHC, 16 valves, Variable Valve Timing (VVT) Performance Horsepower: 263 hp @ 5500 rpm Torque: 280 lb-ft @ 3000 rpm Fuel System Fuel Delivery: Sequential Electronic Fuel Injection (S-EFI) with Direct Injection Fuel Type: Unleaded Premium Gasoline (91 Octane or higher recommended) Turbocharging Turbocharger Type: Garrett GT2554R Ball Bearing Turbocharger Boost Pressure: 14.5 psi (1.0 bar) nominal 🔧 Transmission Standard Transmission Type: 6-speed Manual Transmission (MT) Optional Optional Transmission: N/A (Manual only) Features Gear Ratios: 1st: 3.307, 2nd: 1.947, 3rd: 1.392, 4th: 1.071, 5th: 0.870, 6th: 0.756 (Final Drive: 4.105) Clutch Type: Hydraulically actuated, single-plate, dry Transmission Fluid Type: API GL-4 SAE 75W-90 Gear Oil (Refer to manual for specific Mazda specification, e.g., Mazda Gear Oil 75W-90) 📐 Dimensions Exterior Length: 177.4 inches (4505 mm) Width: 70.1 inches (1780 mm) Height: 57.1 inches (1450 mm) Wheelbase: 104.3 inches (2650 mm) Weights Curb Weight: Approx. 3,131 lbs (1,420 kg) Gross Vehicle Weight Rating: Approx. 4,145 lbs (1,880 kg) 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (Driver), 4-Star (Passenger) NHTSA Side Impact: 5-Star (Front), 4-Star (Rear) IIHS Frontal Offset: Good Active Features ABS: Standard Anti-lock Braking System (ABS) Traction Control: Standard Traction Control System (TCS) Electronic Stability Control: Standard Dynamic Stability Control (DSC) Passive Features Airbags: Front dual-stage airbags, front side-impact airbags, side-curtain airbags Seat Belts: 3-point ELR front and rear seat belts with pretensioners and load limiters Child Seat Anchors: LATCH (Lower Anchors and Tethers for Children) system 💡 Technology Features Infotainment Infotainment System: Base models featured a standard AM/FM/CD audio system. Optional Bose premium audio system available. Display: Optional multi-information display in the instrument cluster. Driver Assistance Driver Assistance...