🏷️ Basic Information Identification Make: BMW Model: 5 Series (E39) Specific Model: 525i Codes Chassis Code: E39 👋 Introduction Market Position Segment: Executive/Mid-size Luxury Sedan Target Audience: Discerning buyers seeking a blend of performance, luxury, and advanced engineering. Competitive Analysis Key Competitors: Mercedes-Benz E-Class (W210), Audi A6 (C5), Lexus GS (JZS160), Jaguar S-Type. Key Features Driving Dynamics: Renowned for its balanced chassis, precise steering, and engaging driving experience ('The Ultimate Driving Machine'). Interior Appointments: High-quality materials, ergonomic design, comfortable seating, advanced (for its time) features like iDrive (later models) and premium audio options. Powertrain Refinement: Smooth inline-six engines known for their power delivery and durability. 📋 Manual Details Coverage Areas Engine Coverage: M52B25 (2.5L I6) Transmission Coverage: 5-speed manual (S5D 250G), 5-speed automatic (GM A5S 310Z, GM A5S 560R) Chassis Coverage: All E39 525i variants Body Coverage: Sedan Page Count Estimated Pages: Over 1500 (typical for comprehensive workshop manuals of this era) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: Digital (PDF likely, some physical copies may exist) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine construction, cylinder head, valve train, crankshaft, pistons, connecting rods, lubrication system, cooling system, fuel injection system, ignition system, exhaust system, engine diagnostics, performance tuning. Transmission Manual: Clutch, gearbox disassembly and assembly, shifting mechanisms, driveshafts, differential. Transmission Automatic: Torque converter, valve body, planetary gear sets, hydraulic control systems, electronic control unit (ECU) interface, diagnostic procedures. Brakes: Hydraulic system, ABS (Anti-lock Braking System) components and diagnostics, brake pads, rotors, calipers, brake lines, parking brake. Suspension: Front and rear suspension components (struts, shock absorbers, control arms, bushings, sway bars), steering system (power steering rack, pump, hoses), wheel alignment specifications. Electrical System: Battery, alternator, starter motor, wiring diagrams, lighting system (headlights, taillights, interior), fuse box layout, relays, diagnostic connector (OBD-II). Climate Control: HVAC system operation, refrigerant charging, blower motor, A/C compressor, heater core, climate control module diagnostics. Body And Interior: Body panel removal and installation, door mechanisms, windows, seats, dashboard, trim panels, convertible top (if applicable, though not for 525i E39), sound deadening. Safety Systems: Airbag system (SRS - Supplemental Restraint System) components, sensors, control module, seatbelt mechanisms. Procedures Included Routine Maintenance: Oil changes, filter replacements (oil, air, cabin, fuel), spark plug replacement, fluid level checks and top-offs, tire rotations, brake inspections. Repair And Overhaul: Engine rebuild procedures, transmission overhaul, suspension component replacement, brake system repairs, cooling system repairs, fuel system servicing, electrical component replacement. Diagnostics And Troubleshooting: Step-by-step troubleshooting guides for common and uncommon issues, diagnostic trouble codes (DTCs) interpretation, use of diagnostic tools (e.g., BMW GT1, INPA). Special Tools: Identification and usage instructions for specialized BMW tools required for specific repairs. Wiring Diagrams: Detailed electrical schematics for all major systems. Technical Depth Depth: Comprehensive: Covers everything from basic fluid checks and filter replacements to full engine and transmission overhauls, advanced electrical diagnostics, and bodywork. 📊 Manual Specifications File Format Digital Format: PDF (Printable, Searchable Text) Print Quality Quality: High-resolution scans for clear text and diagrams Binding Type Physical Binding: N/A (for digital format, but if physical, likely spiral-bound or perfect-bound) Paper Type Physical Paper: N/A (for digital format, but if physical, typically durable, coated paper) ⚙️ Engine Specifications Primary Engine Engine Code: M52B25 Configuration: Inline 6-cylinder (I6) Displacement: 2494 cc (2.5 Liters) Bore X Stroke: 84.0 mm x 75.0 mm Compression Ratio: 10.2:1 Performance Horsepower: 189 hp @ 5900 rpm (approximate, varies slightly by market/year) Torque: 245 Nm (181 lb-ft) @ 3950 rpm (approximate) Fuel System Induction: Electronic Fuel Injection (EFI) - Bosch Motronic ME 7.2 Fuel Type: Unleaded gasoline (91+ octane recommended) Engine Management ECU: Bosch Motronic ME 7.2 🔧 Transmission Standard Type: 5-speed manual (Getrag S5D 250G) Optional Type: 5-speed automatic (GM A5S 310Z or A5S 560R) Features Automatic Control: Adaptive electronic control, Steptronic (manual shifting mode on some models). Fluid Type Manual Gearbox Oil: BMW MTF LT-2 or equivalent (e.g., Red Line MTL) Automatic Transmission Fluid: Dexron III or equivalent (e.g., Pentosin ATF1) 📐 Dimensions Exterior Length: 4770 mm (187.8 in) Width: 1799 mm (70.8 in) Height: 1437 mm (56.6 in) Wheelbase: 2830 mm (111.4 in) Weights Curb Weight: 1550 - 1600 kg (3417 - 3527 lbs) 🛡️ Safety Features Ratings NHTSA Front Impact: Not explicitly rated by NHTSA for this specific year/model in available records, but generally considered strong for its era. IIHS Side Impact: Not explicitly rated by IIHS for this specific year/model in available records. Active Features ABS: Standard Anti-lock Braking System Asc: Optional Automatic Stability Control (ASC+T) Traction Control: Available Passive Features Airbags: Frontal airbags for driver and passenger, optional side-impact airbags. Seatbelts: 3-point inertia-reel seat belts with pretensioners and force limiters Chassis Design: Reinforced safety cell, crumple zones. 💡 Technology Features Infotainment System Name: BMW Professional Radio / Business CD Features: AM/FM radio, CD player, optional navigation system (MKIII/MKIV), optional Harman Kardon premium audio....