The Mazda 6, produced from 2003 to 2008, is a mid-size sedan and wagon celebrated for its sporty handling, refined interior, reliable powertrains, and stylish design, embodying Mazda's 'Stylish, Insightful, and Spirited' philosophy. Built on Mazda's 'GD' platform, it offered a choice of the 2.0L LF-DE or the more powerful 2.3L FS-DE (MZR) engines, paired with either a 5-speed manual or a 5-speed automatic transmission. Known for its excellent safety ratings, including 5-star NHTSA front impact scores and 'Good' IIHS frontal offset and side impact ratings, the Mazda 6 also featured standard Anti-lock Braking System (ABS) and optional Traction Control and Dynamic Stability Control. Its competitive positioning against vehicles like the Honda Accord and Toyota Camry highlights its appeal as a well-engineered and engaging automobile. This comprehensive factory service manual provides detailed guidance for the maintenance, diagnosis, repair, and troubleshooting of all systems for the Mazda 6. It covers essential areas including engine mechanicals, fuel, cooling, and emission control systems; manual and automatic transmissions; brake systems; steering and suspension; and the complete electrical system, including wiring diagrams. Furthermore, the manual details climate control, bodywork, and the supplemental restraint system (SRS). With in-depth procedures for routine maintenance, component replacement, and advanced diagnostics, this manual is an indispensable resource for owners, mechanics, and technicians seeking to preserve the performance and longevity of their 2003 Mazda 6. 🏷️ Basic Information Identification Make: Mazda Model: 6 Year: 2003 Codes Chassis Code: GG/GY Engine Code Primary: LF-DE (2.0L) Engine Code Optional: FS-DE (2.3L) Transmission Code Primary: FS5A-EL (5-speed Automatic) Transmission Code Optional: G5M-R (5-speed Manual) 👋 Introduction Market Position Segment: Mid-size sedan/wagon Key Selling Points: Sporty handling, refined interior, reliable powertrains, stylish design. Competitive Analysis Competitors: Honda Accord, Toyota Camry, Nissan Altima, Ford Fusion, Chevrolet Malibu. Key Features Design Philosophy: 'Stylish, Insightful, and Spirited' design language. Platform: Mazda's 'GD' platform, shared with Ford CD3 platform elements. 📋 Manual Details Coverage Areas Coverage: Comprehensive maintenance, diagnosis, repair, and troubleshooting for all systems. Page Count Estimated Pages: ~1500-2000 (typical for comprehensive service manuals) Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Engine mechanical, lubrication, cooling, fuel, ignition, emission control, engine management, performance tuning. Transmission: Manual and automatic transmission operation, diagnosis, repair, overhaul, driveline, clutch, transfer case (if applicable). Brakes: Brake system components, hydraulic system, ABS, disc and drum brake service, parking brake. Steering Suspension: Power steering system, suspension components, wheel alignment, shock absorbers, struts, chassis. Electrical: Starter, alternator, battery, lighting, wiring diagrams, instrument panel, body control modules (BCM), diagnostic trouble codes (DTCs). Climate Control: HVAC system diagnosis and repair, refrigerant, A/C compressor, heater core, climate control modules. Body: Body panels, doors, windows, interior trim, glass, seals, body repair, corrosion protection. Restraints: Airbag system (SRS), seat belts, pre-tensioners, diagnosis and service procedures. Diagnosis: Diagnostic procedures, fault finding, OBD-II system, scan tool usage, troubleshooting charts. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks, spark plug replacement, belt replacement. Repair: Component removal and installation, engine overhaul, transmission rebuild, brake caliper replacement, suspension arm replacement. Troubleshooting: System-specific diagnostic trees, symptom-based troubleshooting guides, electrical schematics for fault finding. Technical Data: Specifications, tolerances, torque values, wiring diagrams, component locations, diagnostic trouble code (DTC) definitions. Technical Depth Depth: Comprehensive, covering basic DIY maintenance to advanced professional-level diagnostics and repairs. 📊 Manual Specifications File Format Format: Digital PDF Searchability: Text-searchable content for quick information retrieval. Printability: Printable pages for on-site use. Print Quality Image Resolution: High-resolution images and diagrams for clarity. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Name: LF-DE Displacement: 1998 cc (2.0 Liters) Configuration: Inline 4-cylinder, DOHC, 16-valve Horsepower Hp: ~122 hp @ 6000 rpm (Euro Spec) Torque Lb-Ft: ~135 lb-ft @ 4500 rpm (Euro Spec) Optional Engine Engine Name: FS-DE (MZR 2.3) Displacement: 2261 cc (2.3 Liters) Configuration: Inline 4-cylinder, DOHC, 16-valve Horsepower Hp: ~160 hp @ 6000 rpm (US Spec) Torque Lb-Ft: ~150 lb-ft @ 4500 rpm (US Spec) Performance Compression Ratio 2.0L: 9.7:1 Compression Ratio 2.3L: 9.7:1 Fuel System Injection Type: Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline Required Octane: 87 Octane (Minimum) 🔧 Transmission Standard Type: 5-speed Manual Transmission (G5M-R) Optional Type: 5-speed Automatic Transmission (FS5A-EL) Features Automatic Modes: Sport mode, Sequential Active Matic (Activematic) Manual Clutch Type: Dry, single plate Fluid Specifications Automatic Transmission Fluid: Mazda ATF JWS3317 or equivalent MERCON V Manual Transmission Fluid: API GL-4, SAE 75W-90 📐 Dimensions Exterior Sedan Length: 4670 mm (183.9 in) Width: 1780 mm (70.1 in) Height: 1435 mm (56.5 in) Wheelbase: 2675 mm (105.3 in) Exterior Wagon Length: 4745 mm (186.8 in) Height: 1485 mm (58.5 in) Weights Curb Weight Min: ~1420 kg (3130 lbs) Gross Vehicle Weight Rating Gvwr: ~1950 kg (4300 lbs) (approx.) Towing Capacity: Not Specified /...