The Mazda 3, first generation (BK), produced from 2003 to 2009, is a compact car celebrated for its sporty handling, refined interior, and reliable powertrains. Available as both a sedan and a hatchback, it offered engaging driving dynamics through its renowned philosophy, featuring responsive steering and a well-tuned suspension. Competitors like the Honda Civic and Toyota Corolla often found the Mazda 3's upscale interior and athletic performance to be significant advantages. This model line received accolades such as Car and Driver's 10Best list and AJAC's 'Best New Small Car' award, underscoring its appeal in the competitive compact segment. This comprehensive factory service manual provides essential information for the maintenance, repair, and diagnostics of the Mazda 3 (BK). It covers a wide array of systems, including engine mechanicals, fuel, cooling, brakes, transmission, suspension, steering, and electrical components, along with detailed procedures for troubleshooting and component replacement. Technical specifications, wiring diagrams, and component locations are also included. This manual is an indispensable resource for owners, mechanics, and technicians aiming to ensure the optimal performance, longevity, and safety of their Mazda 3. 🏷️ Basic Information Identification Make: Mazda Model: 3 Year: 2003 Generation Generation Designation: First Generation (BK) Codes Chassis Code: BK 👋 Introduction Market Position Segment: Compact Car / Small Family Car Target Audience: DIY enthusiasts, independent repair shops, Mazda owners seeking detailed technical information Competitive Analysis Key Competitors: Honda Civic, Toyota Corolla, Ford Focus, Volkswagen Golf Unique Selling Points: Sporty handling, upscale interior for its class, reliable powertrains Key Features Handling Dynamics: Renowned for its 'Zoom-Zoom' driving dynamics, responsive steering, and well-tuned suspension Interior Design: Often praised for a more premium interior feel than many rivals Body Styles: Available as a 4-door sedan and a 5-door hatchback 📋 Manual Details Coverage Areas Primary Coverage: Maintenance, Repair, Diagnostics, Troubleshooting Secondary Coverage: Electrical Diagrams, Specifications, Component Locations Page Count Estimated Page Count: Over 1000 pages (typical for comprehensive factory service manuals) Manual Type Type: Factory Service Manual (FSM) / Repair Manual Language Language: English Format Format: Digital (likely PDF), Print (optional) 📖 Manual Coverage Systems Covered Engine: Engine Mechanical, Engine Control System (ECU), Fuel System, Lubrication System, Cooling System, Ignition System, Exhaust System Transmission: Manual Transmission (MT), Automatic Transmission (AT), Drivetrain, Axles, Clutch Brakes: Brake System, ABS (Anti-lock Braking System), EBD (Electronic Brake-force Distribution), Brake Components, Hydraulic System Suspension Steering: Front Suspension, Rear Suspension, Steering System, Power Steering Electrical: Body Electrical, Powertrain Electrical, Lighting System, Audio System, Instrument Cluster, HVAC Controls, Wiring Diagrams, Fuses and Relays Body Chassis: Body Exterior, Body Interior, Doors, Windows, Seats, Frame, Corrosion Protection HVAC: Heating, Ventilation, Air Conditioning (HVAC) System Procedures Included Maintenance: Scheduled Maintenance, Oil Changes, Filter Replacements, Fluid Checks and Top-offs, Spark Plug Replacement, Belt Inspection and Replacement Repair: Engine Overhaul, Transmission Rebuild, Brake System Repairs, Suspension Component Replacement, Electrical Component Diagnosis and Repair, Body Panel Repair Diagnostics: Diagnostic Trouble Codes (DTCs), Symptom-Based Troubleshooting, Component Testing Procedures, Scan Tool Data Interpretation Troubleshooting: Diagnostic Flowcharts, Common Problems and Solutions, Intermittent Fault Diagnosis Technical Depth Depth Level: Comprehensive (from basic maintenance to complete engine and transmission overhauls) Diagnostic Tools: Information on using OBD-II scanners, multimeters, oscilloscopes, and specialized Mazda diagnostic equipment (e.g., for ECU programming/updates) 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) Searchability: Searchable text content for quick information retrieval Printability: Printable pages Print Quality Image Resolution: High-resolution images and diagrams Binding Type Binding: N/A (for digital format) Paper Type Paper Quality: N/A (for digital format) ⚙️ Engine Specifications Primary Engine Engine Code 1: Z6 (1.6L DOHC 16-valve) Displacement 1: 1598 cc Horsepower 1: 104 HP @ 6000 RPM Torque 1: 146 Nm (108 lb-ft) @ 4000 RPM Fuel System 1: Electronic Fuel Injection (EFI), Sequential Multi-point Fuel Injection (MPI) Optional Engine 1 Engine Code 2: LF-VE (2.0L DOHC 16-valve MZR) Displacement 2: 1999 cc Horsepower 2: 145 HP @ 6000 RPM Torque 2: 181 Nm (133 lb-ft) @ 4500 RPM Fuel System 2: Electronic Fuel Injection (EFI), Sequential Multi-point Fuel Injection (MPI) Optional Engine 2 Engine Code 3: L3-VE (2.3L DOHC 16-valve MZR DISI Turbo - Speed6) Displacement 3: 2261 cc Horsepower 3: 263 HP @ 5500 RPM (Speed6 variant) Torque 3: 380 Nm (280 lb-ft) @ 3000 RPM (Speed6 variant) Fuel System 3: Direct Injection Spark Ignition (DISI) Turbocharged Performance Engine Construction: Aluminum Alloy Block and Cylinder Head Timing Mechanism: Dual Overhead Camshafts (DOHC), Chain-driven (LF-VE, L3-VE), Belt-driven (Z6 - typical, but manual will confirm) 🔧 Transmission Standard Standard Transmission: 5-speed Manual Transmission (FS5A-EL, G35M-R for performance variants) Optional Optional Transmission: 4-speed Automatic Transmission (FS5A-EL) Features Clutch Type: Dry single plate (manual) Automatic Features: Sport mode, possible manual override (Steptronic-like functionality on some trims) Drivetrain: Front-Wheel Drive (FWD), All-Wheel Drive (AWD) available on select trims (e.g., Mazdaspeed3, though this is for the 2003 model, AWD was less common) 📐 Dimensions Exterior Sedan...