🏷️ Basic Information Identification Make: BMW Model: 325i Model Year: 2004 Chassis Code: E46 Codes Engine Code: M54B25 👋 Introduction Market Position Segment: Premium Compact Executive Sedan/Coupe Competitive Analysis Competitors: Mercedes-Benz C-Class, Audi A4, Lexus IS, Acura TL Key Features Driving Dynamics: Renowned for its balanced chassis, rear-wheel drive dynamics, and engaging driving experience Quality And Refinement: Typical BMW build quality, comfortable interior, and good noise insulation Engine Performance: Smooth and responsive inline-six engine 📋 Manual Details Coverage Areas All Major Topics: true Page Count Estimated Pages: 1000+ Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine: Full overhaul, diagnostics, component testing, removal/installation Transmission Manual: Repair, adjustment, fluid service, component replacement Transmission Automatic: Repair, adjustment, fluid service, torque converter, valve body diagnostics Drivetrain: Driveshaft, differential, axle shafts, wheel bearings Suspension: Front struts, rear shocks, control arms, bushings, springs, alignment procedures Steering: Power steering system, rack and pinion, steering column, tie rods Brakes: Front/rear disc brakes, ABS system, DSC, brake fluid service, component replacement Electrical System: Battery, alternator, starter, lighting, body control module, comfort systems Engine Management: ECU, sensors (MAF, O2, crank, cam), ignition system, fuel injection, VANOS Cooling System: Radiator, water pump, thermostat, coolant hoses, fan clutch Fuel System: Fuel pump, fuel filter, injectors, fuel pressure regulator, EVAP system Exhaust System: Catalytic converter, mufflers, exhaust manifold, O2 sensors Body: Exterior panels, doors, windows, sunroof, interior trim, HVAC system Air Conditioning: Refrigerant system, compressor, condenser, evaporator, climate control Safety Systems: Airbags, seatbelt pre-tensioners, ABS/DSC integration Procedures Included Routine Maintenance: Oil change, filter replacement, fluid checks, spark plug replacement Troubleshooting: Diagnostic procedures, fault code interpretation, symptom-based diagnosis Component Replacement: Step-by-step guides for major and minor components Rebuild Procedures: Engine and transmission rebuilds (where applicable) Calibration And Adjustment: ECU calibration, sensor adjustments, timing checks Technical Depth Depth: Comprehensive: from basic maintenance to advanced diagnostics and major overhauls 📊 Manual Specifications File Format File Type: PDF Searchable: Yes Printable: Yes Print Quality Quality: High-resolution, clear diagrams and text Binding Type Binding: N/A (Digital) Paper Type Paper: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Inline 6-Cylinder Displacement: 2.5 Liters (2494 cc) Bore X Stroke: 82.0 mm x 78.5 mm Compression Ratio: 10.2:1 Valve Train: Double VANOS, DOHC, 4 valves per cylinder Performance Horsepower: 184 hp @ 6000 rpm Torque: 230 Nm (170 lb-ft) @ 3500 rpm Fuel System Fuel Delivery: Sequential Electronic Fuel Injection (Bosch Motronic ME9.2) Fuel Type: Premium Unleaded (91 Octane or higher recommended) Emission Control: Secondary air injection, catalytic converters, O2 sensors 🔧 Transmission Standard Type: 5-speed manual (Getrag GS5-39DZ) Optional Type: 5-speed Steptronic automatic (GM A5S325Z) Features Clutch Type: Hydraulically actuated single-plate dry clutch (manual) Automatic Features: Sequential shift mode (Steptronic), adaptive shift logic Fluid Specs Manual Transmission Fluid: BMW MTF LT-2 (or equivalent) Automatic Transmission Fluid: BMW ATF LT 71141 (or equivalent like Mobil ATF LT 71141) 📐 Dimensions Exterior Length: 175.1 inches (4448 mm) Width: 68.7 inches (1745 mm) Height: 55.5 inches (1410 mm) Wheelbase: 107.4 inches (2729 mm) Weights Curb Weight: Approx. 3300-3500 lbs (1497-1588 kg), depending on options Gross Vehicle Weight Rating: Approx. 4500 lbs (2041 kg) Cargo Trunk Volume: 11.1 cubic feet (314 liters) 🛡️ Safety Features Ratings NHTSA Front Impact: 4 Stars NHTSA Side Impact: 4 Stars Active Features Stability Control: Dynamic Stability Control (DSC) standard Traction Control: Automatic Stability Control and Traction (ASC+T) Anti Lock Brakes: Anti-lock Braking System (ABS) standard Passive Features Airbags: Front airbags, side-impact airbags, optional head protection system (HPS) Seatbelts: Three-point inertia-reel seatbelts with pretensioners Child Seat Anchors: LATCH system (rear seats) 💡 Technology Features Infotainment Head Unit: Standard E46 Business CD or optional Professional CD/Navigation system Audio System: Basic 6-speaker system, optional Harman Kardon upgrade. Driver Assistance Cruise Control: Standard cruise control Parking Assist: Optional rear parking sensors (Park Distance Control - PDC) Connectivity Phone Integration: Optional Bluetooth phone preparation with TCU module (requires adapter for modern phones) 🔧 Maintenance Service Intervals Oil Change: Variable: Based on Condition Based Service (CBS) system, typically 10,000-15,000 miles or 1 year. Air Filter Replacement: Every 30,000-50,000 miles or as needed based on inspection. Cabin Filter Replacement: Every 15,000-30,000 miles or annually. Spark Plug Replacement: Every 60,000-100,000 miles (depending on plug type, OE typically 100k) Brake Fluid Flush: Every 2 years, regardless of mileage. Fluid Specifications Engine Oil: BMW Longlife-01 (LL-01) synthetic 5W-30 or 0W-30 Coolant: BMW Antifreeze/Coolant (G48 ethylene glycol based) mixed 50/50 with distilled water Power Steering Fluid: BMW Power Steering Fluid (or Pentosin CHF 11S) Known Issues Ccv System: Crankcase Ventilation (CCV) system failure leading to oil consumption and potential vacuum leaks. Oil Pan Gasket: Leaking oil pan gasket is common due to age and material degradation. Cooling System: Plastic cooling system components (expansion tank, water pump housing, thermostat housing) are prone to cracking. Vanos...