🏷️ Basic Information Identification Make: BMW Model: 3 Series Chassis Code: E46 Model Year: 2003 Generation Generation Code: E46 (Fourth Generation) Generation Years: 1998-2006 (Global), 1999-2006 (North America) Codes Platform: BMW New Generation Sedan/Coupe Platform 👋 Introduction Market Position E46 Market Segment: Compact executive car, a benchmark in its segment for sporty handling and premium feel. Bmw 3 Series Legacy: The 3 Series is BMW's best-selling model globally and is considered the archetypal sport sedan. Competitive Analysis Key Competitors E46: Mercedes-Benz C-Class (W203), Audi A4 (B6), Lexus IS, Acura TL. Key Features E46 Distinctive Attributes: Excellent chassis dynamics (often cited as one of the best handling generations), refined interior, strong engine options, rear-wheel drive bias (with xDrive AWD available). Manual Value Proposition Manual Benefit: Empowers owners and independent mechanics with the same factory-level information used by BMW technicians, enabling accurate diagnosis, maintenance, and repair, thus saving money and ensuring vehicle longevity. 📋 Manual Details Coverage Areas All Models: Yes, covers all E46 models, engines, trims, and transmissions for 2003 Page Count Estimated Page Count: Over 2000 pages (typical for comprehensive BMW workshop manuals) Manual Type Manual Type: Workshop Service and Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Engine disassembly, assembly, overhaul, cylinder head, block, crankshaft, pistons, connecting rods, timing system, lubrication system, cooling system, fuel delivery, emissions control. Engine Management: Engine Control Unit (ECU) diagnostics, sensor readings, ignition system, fuel injection system, VANOS system, emissions diagnostics (OBD-II). Transmission: Manual and automatic transmission service, repair, overhaul, clutch, torque converter, valve body, shift solenoids, transmission control module (TCM). Drivetrain: Driveshafts, CV joints, differential service, limited-slip differential (LSD) information (if applicable). Suspension: Front and rear suspension component replacement, shock absorbers, struts, control arms, bushings, springs, alignment procedures. Steering: Power steering system service, rack and pinion repair, steering column, tie rods, hydraulic system. Brakes: Brake system overhaul, disc brakes, ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), brake fluid flush, caliper replacement, rotor replacement, pad replacement. Electrical System: Battery, charging system (alternator), starting system (starter), wiring diagrams, fuses, relays, lighting systems, horn. Body And Chassis: Body panel removal and installation, doors, hood, trunk, bumpers, interior trim, glass replacement, chassis lubrication. HVAC: Heating, Ventilation, and Air Conditioning (HVAC) system diagnostics, refrigerant service, blower motor, climate control unit, heater core, A/C compressor. Interior: Seat removal and installation, dashboard removal, instrument cluster, airbag system components, interior lighting. Exterior: Exterior lighting, mirrors, emblems, wiper system, sunroof operation. Procedures Included Scheduled Maintenance: Oil changes, filter replacements, spark plug replacement, fluid checks and changes, belt inspections and replacement. Troubleshooting: Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides, fault code explanations. Repair Procedures: Step-by-step instructions for component removal, installation, and repair for all major vehicle systems. Diagnostic Procedures: Detailed instructions for using diagnostic tools, reading fault codes, and interpreting sensor data. Torque Specifications: Precise torque values for all critical fasteners. Wiring Diagrams: Comprehensive and clear electrical wiring diagrams for all circuits. Special Tools: Identification and usage instructions for specialized BMW tools required for certain repairs. Technical Depth Depth Of Coverage: Comprehensive, covering everything from basic fluid checks and adjustments to full engine and transmission rebuilds. Includes advanced diagnostics and system-specific repairs. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable PDF, allowing for quick location of specific information. Print Quality Image Resolution: High-resolution images, diagrams, and schematics for clarity. Printable: Yes, designed to be printable for workshop use. Binding Type Binding For Printed: Not applicable for PDF, but original manuals typically use spiral-bound or case-bound for durability. Paper Type Paper Type For Printed: Not applicable for PDF, but original manuals use high-quality, durable paper. ⚙️ Engine Specifications Primary Engine Options 2003 320I: 2.2L M54B22 I6, 170 PS (125 kW), 210 Nm 325I/325Xi: 2.5L M54B25 I6, 184 PS (135 kW), 245 Nm 330I/330Xi: 3.0L M54B30 I6, 225 PS (165 kW), 289 Nm M3: 3.2L S54B32 I6, 343 PS (252 kW), 365 Nm Performance Engine Type: Inline-6 (I6) across most petrol variants, known for smoothness and balance. Engine Technology: Aluminum engine block and cylinder head, Double VANOS (Variable valve timing), sequential fuel injection, DISA intake manifold (on some variants). Fuel System Fuel Type: Premium Unleaded Gasoline (RON 95 or higher recommended) Fuel Delivery: Electronic Fuel Injection (EFI) with Bosch Motronic engine management. 🔧 Transmission Standard Standard Transmission Options: 5-speed manual transmission (Getrag GS5-39DZ on most models, ZF S5D 320Z on others). Optional Optional Transmission Options: 5-speed Steptronic automatic transmission (GM A5S360R/A5S390R), SMG (Sequential Manual Gearbox) for M3 models. Features Steptronic Functionality: Allows manual gear selection via shifter or steering wheel buttons (depending on option). Smg Features: Electro-hydraulic clutch and gear shift actuation, offering rapid gear changes for performance driving. 📐 Dimensions Exterior Body Styles: Sedan (4-door), Coupe (2-door), Convertible (2-door), Touring (Wagon, 5-door), M3 variants. Wheelbase: Approx. 2760 mm (108.7...