🏷️ Basic Information Identification Make: BMW Model: 323i Model Variant: 323 Year: 2004 Codes Chassis Code: E46 Engine Code Suffix: B25 👋 Introduction Market Position Segment: Compact Executive Sedan/Coupe Competitors: Mercedes-Benz C-Class, Audi A4, Lexus IS, Infiniti G35 Key Features Driving Dynamics: Renowned for BMW's signature 'Ultimate Driving Machine' handling and balance Powertrain: Smooth and responsive inline-six engine Build Quality: High-quality interior materials and solid construction 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive service, repair, and diagnostic procedures Included Sections: Engine, Drivetrain, Suspension, Steering, Brakes, Electrical System, HVAC, Body, Exterior, Interior Page Count Estimated Page Count: 1500+ Manual Type Type: Service and Repair Workshop Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine overhaul, cylinder head, block, pistons, crankshaft, camshafts, timing systems (VANOS), lubrication, cooling Engine Electrical: Ignition system, fuel injection system (DME - Digital Motor Electronics), sensors, actuators, ECU diagnostics Transmission: Manual and Automatic Transmission (GM 5L40-E) service, repair, overhaul, fluid specifications, control modules Drivetrain: Clutch, driveshafts, differential, axles, wheel bearings Suspension: Front and rear suspension components (struts, shock absorbers, control arms, ball joints, bushings), alignment specifications Steering: Power steering system, steering rack, tie rods, steering column Brakes: Front and rear brake systems (disc brakes), ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), hydraulic system, bleeding procedures Electrical System: Wiring diagrams, fuse box locations, lighting, power windows, mirrors, central locking, battery, starter, alternator HVAC: Air conditioning system, heater core, blower motor, climate control module, refrigerant handling Body Exterior: Body panels, doors, hood, trunk, bumpers, glass, seals, rust prevention Body Interior: Seats, dashboard, trim panels, airbags, seatbelts, interior lighting Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, spark plug replacement, fluid checks and changes Troubleshooting: Diagnostic charts, symptom-based troubleshooting for common issues Repair: Detailed step-by-step repair instructions for all major components and systems Diagnostics: OBD-II (On-Board Diagnostics II) procedures, fault code interpretation, sensor testing, diagnostic tool usage Disassembly Reassembly: Complete procedures for removing, inspecting, repairing, and reinstalling components Technical Depth Depth: Expert-level, suitable for professional mechanics and advanced DIY enthusiasts Diagnostic Tools: Information on using BMW-specific diagnostic tools (e.g., DIS, ISTA) and general OBD-II scanners Wiring Diagrams: Detailed, system-specific wiring schematics 📊 Manual Specifications File Format File Type: PDF Searchability: Text-searchable Printability: Printable Print Quality Image Resolution: High-resolution diagrams and illustrations Binding Type Binding: N/A (Digital) Paper Type Paper Quality: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Code: M54B25 Engine Type: Naturally Aspirated Inline-6 Cylinder Displacement: 2.5 Liters (2494 cc) Bore X Stroke: 82.0 mm x 79.5 mm Compression Ratio: 10.2:1 Performance Horsepower: 184 hp @ 6000 rpm Torque: 237 Nm (175 lb-ft) @ 3500 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (Bosch Motronic ME7.2) Fuel Type: Premium Unleaded (91 octane or higher recommended) Emission Control: Secondary Air Injection System, Catalytic Converters Engine Features Valvetrain: Double Overhead Camshafts (DOHC), 24 Valves, Double VANOS (Variable Valve Timing) Cooling System: Pressurized liquid cooling system with electric fan Lubrication System: Wet sump lubrication, oil filter, oil cooler (if equipped) 🔧 Transmission Standard Transmission Type: 5-speed Manual (Getrag S5D 320Z) Optional Transmission Type: 5-speed Automatic (GM 5L40-E) Features Clutch Type: Hydraulically operated single dry plate clutch (Manual) Automatic Control: Electronic control, Steptronic (manual shifting mode) 📐 Dimensions Exterior Length: 4471 mm (176.0 inches) Width: 1739 mm (68.5 inches) Height: 1414 mm (55.7 inches) Wheelbase: 2760 mm (108.7 inches) Weights Curb Weight Manual: 1450 kg (3197 lbs) Curb Weight Automatic: 1490 kg (3285 lbs) Gross Vehicle Weight Rating: 1900 kg (4189 lbs) Wheel Bolt Pattern: 5 x 120 mm Wheel Size: 16-inch or 17-inch alloy wheels Tire Size Standard: 205/55 R16 (Front), 225/50 R16 (Rear) Cargo Trunk Volume: 440 Liters (15.5 cubic feet) 🛡️ Safety Features Ratings NHTSA Front Impact Driver: 5-Star NHTSA Front Impact Passenger: 5-Star IIHS Side Impact: Good (for vehicles equipped with side airbags) Active Features ABS: Standard Anti-lock Braking System Dsc: Standard Dynamic Stability Control Traction Control: Standard Automatic Stability Control + Traction (ASC+T) Passive Features Airbags: Frontal airbags, optional front side-impact airbags Seatbelts: 3-point inertia-reel seatbelts with pretensioners Child Seat Anchors: LATCH (Lower Anchors and Tethers for Children) system (where applicable) 💡 Technology Features Infotainment Head Unit: BMW Business CD or Professional CD/Cassette radio, optional CD changer Navigation: Optional BMW Professional Navigation System (MK4 unit) Driver Assistance Parking Sensors: Optional Rear Park Distance Control (PDC) Cruise Control: Standard Cruise Control Connectivity Bluetooth: Optional Bluetooth mobile phone integration (often requiring a separate cradle) Comfort Features Climate Control: Optional Automatic Climate Control with digital display 🔧 Maintenance Service Intervals Oil Change Interval: Approximately every 7,500-15,000 miles or as indicated by the Condition Based Service (CBS) system Brake Fluid Change: Every 2 years (regardless of mileage) Coolant Change: Every 3-4 years or as recommended by BMW (BMW Blue Coolant) Spark Plug Replacement: Around 60,000 - 100,000 miles, depending on spark plug...