🏷️ Basic Information Identification Make: BMW Model: 5-series Generation Chassis Code: E39 Codes Model Year Covered: 2004 👋 Introduction Market Position Segment: Executive Sedan / Mid-size Luxury Sedan Reputation: Known for driving dynamics, build quality, and sophisticated engineering. Competitive Analysis Competitors: Mercedes-Benz E-Class, Audi A6, Lexus GS, Cadillac CTS, Volvo S80 Key Features Vehicle Appeal: Balance of performance, comfort, and luxury. Strong driver engagement. Manual Value Proposition Usefulness: Provides dealership-level repair and maintenance information, essential for DIY enthusiasts and independent repair shops. 📋 Manual Details Coverage Areas Models Covered: All E39 5-series models including 525i, 530i, 540i, M5 Regions Covered: Global (specifications may vary slightly by market) Page Count Estimated Page Count: 1500+ Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Digital (likely PDF or similar e-format) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, lubrication, cooling, fuel, exhaust, ignition, engine management (DME/ECU), clutch, transmission (manual & automatic), drivetrain (driveshafts, differentials), AWD (xDrive if applicable) Chassis: Suspension (front & rear), steering system, braking system (ABS, DSC), wheels & tires Electrical: Battery, charging system, starting system, lighting (headlights, taillights, interior), instrumentation, body electronics (power windows, locks, mirrors), climate control electronics, infotainment system wiring, SRS airbag system, basic troubleshooting of common electrical faults Bodywork: Body panels, doors, hood, trunk, bumpers, exterior trim, interior trim, HVAC system (controls, ducting, actuators), basic body repair procedures Procedures Included Maintenance: Oil changes, filter replacements, spark plug service, coolant flushes, brake fluid changes, drive belt replacement, air filter replacement, cabin filter replacement Diagnostics: Troubleshooting guides, diagnostic trouble codes (DTCs), symptom-based diagnostics for various systems Repair: Component removal & installation, engine rebuilding procedures, transmission overhaul, suspension component replacement, brake caliper/rotor service, electrical component diagnosis and repair, body panel alignment and repair Specifications: Torque specifications for all fasteners, fluid capacities and types, electrical system voltages and schematics, component dimensions and tolerances Technical Depth Depth: Comprehensive (from basic maintenance to complete engine and transmission rebuilds, advanced diagnostics, and detailed electrical schematics) 📊 Manual Specifications File Format Searchability: Likely searchable text for quick information retrieval Print Quality Quality: High (typical of OEM or authorized aftermarket publications) Binding Type Binding: N/A (digital format) Paper Type Paper: N/A (digital format) ⚙️ Engine Specifications Primary Engine Engine Code Common: M54 (for 525i, 530i), M62 (for 540i) Engine Type: Inline-6 (525i, 530i), V8 (540i) Displacement 525I: 2.5 Liters (2494 cc) Displacement 530I: 3.0 Liters (2979 cc) Displacement 540I: 4.4 Liters (4398 cc) Performance Horsepower 525I: 184 hp @ 6000 rpm Torque 525I: 175 lb-ft @ 3500 rpm Horsepower 530I: 225 hp @ 5900 rpm Torque 530I: 214 lb-ft @ 3500 rpm Horsepower 540I: 290 hp @ 5400 rpm Torque 540I: 324 lb-ft @ 3600 rpm Fuel System Injection Type: Electronic Fuel Injection (EFI), Sequential Multi-port Injection (MPI) Fuel Grade Recommended: Premium Unleaded (91 octane or higher) 🔧 Transmission Standard Transmission Type 525I 530I: 5-speed Manual (Getrag S5D 250G) Transmission Type 540I: 6-speed Manual (Getrag S6S 420G) Optional Transmission Type 525I 530I: 5-speed Automatic (Steptronic - GM 5L40-E) Transmission Type 540I: 5-speed Automatic (Steptronic - ZF 5HP30) Features Drivetrain: Rear-Wheel Drive (RWD) 📐 Dimensions Exterior Length: Approx. 190.6 inches (4841 mm) Width: Approx. 71.1 inches (1806 mm) Height: Approx. 57.1 inches (1450 mm) Wheelbase: Approx. 111.4 inches (2830 mm) Weights Curb Weight Approx 525I: 3500-3600 lbs (1588-1633 kg) Curb Weight Approx 540I: 3800-3900 lbs (1724-1769 kg) 🛡️ Safety Features Ratings NHTSA Front Impact: 5-star (driver and passenger) IIHS Side Impact: Good (for vehicles tested) Active Features Traction Control: Traction Control System (TCS) / Dynamic Stability Control (DSC) ABS: Anti-lock Braking System (ABS) Stability Control: Standard DSC (Dynamic Stability Control) Passive Features Airbags: Frontal airbags (driver & passenger), side airbags (front occupants), optional head protection airbags (front & rear) Seatbelts: 3-point seat belts with pretensioners and force limiters 💡 Technology Features Infotainment System Name: BMW Professional Radio, optional Navigation System (MKIV), optional Harman Kardon audio system User Interface: iDrive controller introduced later in the E39 lifecycle (around 2001-2002), but many 2004 models still feature the earlier button-based interface or a simpler infotainment screen. Driver Assistance Features: Cruise Control, Parking Sensors (Park Distance Control - PDC), Xenon Headlights with Halos (optional) Connectivity Features: Onboard Computer, Tele Aid (telematics system, availability varies by market) 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500-10,000 miles or annually, depending on driving conditions and oil used. BMW's Condition Based Service (CBS) system would monitor this. Spark Plug Replacement: M54 engines: ~100,000 miles. M62 engines: ~60,000 miles. Coolant Flush: Every 2-4 years or 30,000-50,000 miles. Fluid Specifications Engine Oil Type M54: SAE 5W-30 Synthetic, meeting BMW Longlife-01 (LL-01) or Longlife-04 (LL-04) specification Engine Oil Type M62: SAE 5W-40 or 5W-30 Synthetic, meeting BMW Longlife-98 (LL-98) or Longlife-01 (LL-01) specification Coolant: BMW Blue or Purple Antifreeze/Coolant (G48 type), mixed 50/50 with distilled water Brake Fluid: DOT 4...