🏷️ Basic Information Identification Make: BMW Model: 3 Series Model Variant: 325i Year: 2004 Codes Chassis Code: E46 Engine Code: M54B25 👋 Introduction Market Position Segment: Compact Executive Sedan/Coupe/Convertible Target Audience: Enthusiasts, DIY mechanics, professional repair shops Competitive Analysis Key Competitors 2004: Mercedes-Benz C-Class, Audi A4, Lexus IS300, Infiniti G35 Key Features Vehicle Philosophy: The Ultimate Driving Machine, balanced handling, refined performance Manual Value Proposition: Empowers owners with factory-accurate repair and maintenance knowledge 📋 Manual Details Coverage Areas Diagnostic Troubleshooting: Extensive Engine Mechanical: Complete Engine Management System: Comprehensive Transmission Systems: Complete Suspension Steering: Complete Brake Systems: Complete Electrical Systems: Comprehensive Body Interior: Detailed Climate Control: Detailed Body Electrical: Comprehensive Comfort Systems: Detailed Safety Systems: Detailed Maintenance Procedures: All Repair Procedures: All Wiring Diagrams: Included Page Count Estimated Pages: 1000+ Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine, Transmission, Drivetrain Chassis: Suspension, Steering, Brakes Electrical: ECU, Sensors, Lighting, Power Distribution, Audio Comfort And Convenience: HVAC, Power Accessories, Seats Body: Exterior Panels, Interior Trim, Doors, Windows Safety Features: Airbags, Seatbelts, ABS, DSC Procedures Included Scheduled Maintenance: Oil changes, filter replacements, fluid checks Engine Repair: Head gasket, piston rings, valve timing, component replacement Transmission Service: Fluid changes, seal replacements, clutch service (manual), valve body repair (automatic) Brake Service: Pad/rotor replacement, caliper overhaul, bleeding procedures Electrical Diagnostics: Component testing, sensor diagnosis, wiring harness repair Troubleshooting Guides: Fault code interpretation, symptom-based diagnosis Assembly Disassembly: Step-by-step instructions for component removal and installation Body Repair: Panel replacement, dent repair, trim installation Technical Depth Depth: Factory-level detail for all repair and maintenance operations Diagnostic Codes: Covers OBD-II fault codes and BMW-specific codes Torque Specifications: All critical fastener torque values included Clearances Tolerances: Specified for key engine and mechanical components 📊 Manual Specifications File Format Type: PDF Searchability: Searchable text for quick information retrieval Print Quality Resolution: High-resolution, suitable for professional printing Scalability: Printable in entirety or specific sections Binding Type Binding: Digital Download (Printable) Paper Type Recommendation: Standard or heavy-weight paper for printing workshop copies ⚙️ Engine Specifications Primary Engine Engine Type: Inline-6, Naturally Aspirated Displacement: 2.5 Liters (2494 cc) Bore X Stroke: 84 mm x 75 mm Compression Ratio: 10.2:1 Valve Train: DOHC, 24 Valves, Double VANOS Performance Horsepower: 184 hp @ 6000 rpm Torque: 237 Nm (175 lb-ft) @ 3500 rpm Fuel System Fuel Delivery: Multi-point Fuel Injection (Bosch Motronic ME9.2) Fuel Type: Premium Unleaded Gasoline (91 Octane Recommended) Cooling System Coolant Type: BMW Blue Antifreeze/Coolant (G48 ethylene glycol based) Lubrication System Oil Capacity: 6.5 Liters (6.9 US Quarts) Recommended Oil Viscosity: SAE 0W-40 or 5W-30 (BMW LL-01 certified) Ignition System Spark Plugs: NGK BKR6EQUP (or equivalent) 🔧 Transmission Standard Type: 5-Speed Manual (Getrag S5D 250G) Optional Type: 5-Speed Automatic (ZF 5HP19) Features Automatic Features: Steptronic manual shift mode Fluid Specifications Manual Transmission Fluid: GL-4 or GL-5 rated synthetic gear oil Fluid Specifications Automatic Transmission Fluid: BMW ATF LT-3 (or equivalent Lifeguardfluid 5) Gear Ratios Manual First Gear: 4.235 Second Gear: 2.500 Third Gear: 1.556 Fourth Gear: 1.159 Fifth Gear: 0.853 Reverse: 3.727 📐 Dimensions Exterior Length: 4526 mm (178.2 in) Width: 1739 mm (68.5 in) Height: 1415 mm (55.7 in) Wheelbase: 2760 mm (108.7 in) Weights Curb Weight Manual: 1500 kg (3307 lbs) Curb Weight Automatic: 1530 kg (3373 lbs) Gross Vehicle Weight Rating: 1970 kg (4343 lbs) Wheels Tires Standard Wheel Size: 16 x 7.0 inch Optional Wheel Size: 17 x 7.5 inch front, 17 x 8.0 inch rear Standard Tire Size: 205/55R16 Optional Tire Size: 225/45R17 front, 245/40R17 rear Bolt Pattern: 5x120 Center Bore: 72.5 mm Lug Nut Size: M14 x 1.5 🛡️ Safety Features Ratings NHTSA Frontal Crash Test: 5-Star (Driver & Passenger) IIHS Side Impact Test: Good Active Features Traction Control: Dynamic Stability Control (DSC) Anti Lock Brakes: Standard ABS Braking Assist: Optional, part of DSC system Passive Features Airbags: Frontal, Side-impact, Optional Head Airbags Seatbelts: Pretensioners, Force Limiters Child Seat Anchors: LATCH system 💡 Technology Features Infotainment Head Unit Options: BMW Business CD, BMW Professional CD, Optional Navigation System Audio System: Standard 6-speaker system, Optional Harman Kardon premium audio Driver Assistance Parking Assistance: Optional Rear Park Distance Control (PDC) Cruise Control: Standard Connectivity Cellular Integration: Optional BMW Assist telematics system Auxiliary Input: Not standard; aftermarket solutions available. 🔧 Maintenance Service Intervals Oil Change Interval: Variable Service Interval (VSI) based on driving conditions, typically 10,000-15,000 miles or 1 year. Air Filter Replacement: Every 30,000 miles or as needed. Cabin Filter Replacement: Every 15,000-30,000 miles. Spark Plug Replacement: Every 60,000 miles for iridium plugs (NGK BKR6EQUP). Coolant Flush: Every 2-3 years or 30,000-50,000 miles. Brake Fluid Flush: Every 2 years. Fluid Specifications Power Steering Fluid: Pentosin CHF 11S or ZF-TE-ML 02K Brake Fluid: DOT 4 Known Issues Ccv System Failure: Cracked or clogged Crankcase Ventilation (CCV) system leading to...