🏷️ Basic Information Identification Make: BMW Model: 325xi Year: 2003 Codes Chassis Code: E46 Engine Code: M54B25 👋 Introduction Market Position Segment: Compact Executive Sedan/Wagon Target Audience: Enthusiasts, DIY mechanics, professional technicians working on E46 3-series Competitive Analysis Key Competitors 2003: Audi A4 Quattro, Mercedes-Benz C-Class 4MATIC, Lexus IS300 Key Features Vehicle Drivetrain: BMW's intelligent xDrive all-wheel-drive system Engine Technology: Smooth and responsive M54 inline-6 engine with VANOS (Variable Valve Timing) Key Features Manual Comprehensiveness: Covers virtually every aspect of vehicle repair and maintenance Diagnostic Emphasis: Strong focus on diagnostic procedures and troubleshooting common electrical and mechanical faults 📋 Manual Details Coverage Areas Primary Focus: Service and Repair Secondary Focus: Maintenance, Troubleshooting, Rebuilding, Refurbishment, Restoration Page Count Estimated Pages: 1500+ Manual Type Type: Full Service Repair Manual Language Language: English Format Format: Digital (PDF) File Format: Searchable PDF Print Quality: High-resolution, clear text and diagrams Binding Type: N/A (Digital PDF) Paper Type: N/A (Digital PDF) 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, inspection, assembly, tuning, diagnosis, M54B25 inline-6 Drivetrain: All-wheel drive (xDrive) system, differentials (front, rear), driveshafts, CV joints Transmission: Automatic (Steptronic) and Manual transmissions, clutch, torque converter, seals, linkages Suspension: Front and rear suspension components, struts, shocks, control arms, bushings, springs, sway bars, alignment specifications Brakes: Front and rear brake systems (discs and pads), ABS, DSC (Dynamic Stability Control), hydraulic lines, master cylinder, calipers Steering: Power steering system, steering rack, pump, hoses, tie rods, steering column Cooling System: Radiator, coolant hoses, water pump, thermostat, expansion tank, cooling fan Fuel System: Fuel pump, fuel injectors, fuel filter, fuel lines, EVAP system Exhaust System: Exhaust manifolds, catalytic converters, mufflers, oxygen sensors Electrical System: Battery, alternator, starter motor, wiring diagrams, lighting, fuses, relays, ignition system Comfort Systems: HVAC (Heating, Ventilation, Air Conditioning), climate control, blower motor, evaporator, condenser Body And Chassis: Body panel removal and installation, doors, hood, trunk, interior trim, chassis components Diagnostics: OBD-II (On-Board Diagnostics) troubleshooting, fault codes, diagnostic procedures, BMW ISTA/D integration (conceptual) Procedures Included Scheduled Maintenance: Oil changes, filter replacements, fluid checks and flushes, spark plug replacement, belt inspection/replacement Troubleshooting: Step-by-step diagnostic guides for common and uncommon issues Repair And Rebuild: Detailed instructions for component removal, repair, and reinstallation Component Testing: Procedures for testing sensors, actuators, and electronic modules Torque Specifications: All critical fastener torque values for engine, chassis, and body components Wiring Diagrams: Comprehensive electrical schematics for all vehicle systems Technical Depth Depth: Comprehensive from basic maintenance to complete engine and transmission overhauls Detail Level: Highly detailed, often with OEM-level procedures and specifications ⚙️ Engine Specifications Primary Engine Engine Code: M54B25 Engine Type: Naturally Aspirated Inline-6 Displacement: 2.5 Liters (2494 cc) Bore X Stroke: 84.0 mm x 75.0 mm Compression Ratio: 10.2:1 Performance Horsepower: 184 hp @ 6000 rpm Torque: 230 Nm (169 lb-ft) @ 3500 rpm Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) Fuel Type: Premium Unleaded Gasoline (91+ octane recommended) Engine Management ECU: Siemens MS43 (typical) 🔧 Transmission Standard Type: 5-speed Manual Transmission (Getrag GS5-39DZ) Optional Type: 5-speed Automatic Transmission with Steptronic (GM A5S360R / A5S390R) Features Drivetrain Layout: xDrive All-Wheel Drive Fluid Specifications Manual Transmission Fluid: BMW MTF LT-2 (or equivalent, e.g., Castrol SAF-XO) Automatic Transmission Fluid: Esso LT 71141 (or equivalent, e.g., Pentosin ATF LT-2) 📐 Dimensions Exterior Sedan Length: 4471 mm (176.0 in) Width: 1739 mm (68.5 in) Height: 1415 mm (55.7 in) Wheelbase: 2760 mm (108.7 in) Front Track: 1471 mm (57.9 in) Rear Track: 1496 mm (58.9 in) Weights Curb Weight Manual: ~1570 kg (3461 lbs) Curb Weight Automatic: ~1590 kg (3505 lbs) Cargo Trunk Volume: 440 Liters (15.5 cu ft) 🛡️ Safety Features Ratings NHTSA Frontal Impact: 4/5 Stars (Driver/Passenger) NHTSA Side Impact: 4/5 Stars (Front/Rear Passengers) Active Features ABS: Standard Anti-lock Braking System Dsc: Standard Dynamic Stability Control Traction Control: Standard Traction Control (ASC+T) Passive Features Airbags: Frontal airbags, front side-impact airbags, optional front and rear head protection system (HPS) Seatbelts: 3-point inertia-reel seatbelts with pretensioners Chassis: Reinforced safety cell structure 💡 Technology Features Infotainment Head Unit: BMW Business CD, BMW Professional RDS, or optional navigation system Audio System: Standard 6-speaker system, optional Harman Kardon Logic 7 system Driver Assistance Stability Control: DSC (Dynamic Stability Control) Cruise Control: Standard cruise control Connectivity Bluetooth: Optional Bluetooth preparation with mobile phone integration Aux Input: Optional (often requires modification or specific models) 🔧 Maintenance Service Intervals Oil Change Interval: 10,000-15,000 miles or 1 year (flexible service interval system, CBS) Spark Plug Replacement: Every 60,000-100,000 miles (depending on spark plug type, e.g., iridium) Coolant Flush: Every 2-3 years or 30,000-50,000 miles Brake Fluid Flush: Every 2 years Fluid Specifications Engine Oil: SAE 5W-30 Synthetic (BMW Longlife-01 or LL-01FE compliant) Coolant: BMW Blue Antifreeze/Coolant (G48 specification) Power Steering Fluid: BMW Power Steering Fluid (e.g., Pentosin CHF 11S or G002000) Known Issues Ccv System: Crankcase Ventilation (CCV) system failure leading to...