🏷️ Basic Information Identification Make: BMW Model: 525i Model Variant: 525i Year: 1994 Codes Chassis Code: E34 Engine Code Prefix: M50 👋 Introduction Market Position Positioning: Premium executive sedan offering a balance of performance, luxury, and technology Competitive Analysis Competitors: Mercedes-Benz E-Class (W124), Audi 100/A6 (C4), Lexus GS Key Features Drivetrain Layout: Rear-wheel drive (RWD) standard, optional All-wheel drive (xDrive, though less common on 525i of this era) Body Styles: Sedan (E34) Handling Dynamics: Renowned for balanced chassis and engaging driving experience 📋 Manual Details Coverage Areas Coverage: Complete factory service and repair Page Count Page Count: Hundreds of pages (exact count not specified in product description) Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine: Detailed diagnostics, repair, and overhaul for M50B25 engine Engine Management: DME (Digital Motor Electronics) system, sensor diagnostics, component testing Fuel System: Fuel injection system, fuel pump, injectors, fuel pressure regulation Ignition System: Ignition coils, spark plugs, wiring, timing Transmission: Manual (Getrag 260) and Automatic (ZF 4HP22) transmission service and repair Drivetrain: Driveshaft, differential, axles, wheel bearings Suspension: Front and rear suspension components, shock absorbers, springs, bushings Steering: Power steering system, steering rack, tie rods, steering column Brakes: Front and rear disc brakes, ABS (Anti-lock Braking System) diagnostics and repair Electrical System: Wiring diagrams, component testing, alternator, starter, battery, lighting Body And Chassis: Body panel removal/installation, interior trim, doors, windows, sunroof HVAC: Heating, ventilation, and air conditioning system service and repair Exhaust System: Exhaust manifold, catalytic converter, mufflers, pipes Cooling System: Radiator, water pump, thermostat, hoses, coolant specifications Wheels And Tires: Tire pressure, rotation, wheel alignment specifications Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, inspections Troubleshooting: Systematic diagnostics for common and uncommon issues Repair: Step-by-step repair instructions for all major components Overhaul: Complete engine and transmission overhaul procedures Diagnostics: Component testing, fault code interpretation, electrical system diagnostics Technical Depth Depth: Comprehensive, suitable for professional mechanics and advanced DIY enthusiasts 📊 Manual Specifications File Format Format: PDF Print Quality Quality: High-resolution, printable pages Binding Type Binding: Not applicable (PDF format) Paper Type Paper Type: Not applicable (PDF format) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-cylinder, DOHC, 24-valve Engine Code: M50B25 Displacement: 2.5 Liters (2494 cc) Performance Horsepower: 189 hp @ 5900 rpm (approximate) Torque: 245 Nm (181 lb-ft) @ 4200 rpm (approximate) Fuel System Fuel Delivery: Bosch Motronic Electronic Fuel Injection (EFI) Fuel Type: Unleaded Premium (91 Octane or higher recommended) Engine Management ECU: Bosch Motronic M3.3 (typical for 1994 models) 🔧 Transmission Standard Type: Getrag 260 5-speed Manual Transmission Optional Type: ZF 4HP22 4-speed Automatic Transmission Features Manual Fluid Spec: BMW MTF-LT-1 or equivalent (e.g., Pentosin MTF 2) Automatic Fluid Spec: Dexron III / Mercon (BMW P/N 83 22 9 407 859) 📐 Dimensions Exterior Length: 4,720 mm (185.8 in) Width: 1,751 mm (68.9 in) Height: 1,412 mm (55.6 in) Wheelbase: 2,761 mm (108.7 in) Weights Curb Weight Manual: Approx. 1,560 kg (3,439 lbs) Curb Weight Automatic: Approx. 1,590 kg (3,505 lbs) 🛡️ Safety Features Ratings NHTSA Driver Front: Not directly comparable to modern standards, but designed with robust safety cage. IIHS Side Impact: Not readily available for this specific year and model. Active Features ABS: Standard Anti-lock Braking System Traction Control: Optional ASC (Automatic Stability Control) on some models Passive Features Airbags: Driver's side airbag standard Seatbelts: Pre-tensioned front seatbelts 💡 Technology Features Infotainment Audio System: Factory cassette or CD player, optional premium sound systems (e.g., Harman Kardon). Navigation: Optional factory navigation system (very basic by modern standards). Driver Assistance Cruise Control: Standard Parking Assistance: Rear parking sensors (optional on some models). Connectivity Connectivity Features: Limited by modern standards; typically features like external antenna for radio. 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 - 10,000 miles (12,000 - 16,000 km) or annually, depending on driving conditions (refer to manual for specifics). Spark Plug Replacement: Typically every 60,000 miles (100,000 km) for platinum-tipped plugs (refer to manual for exact type and interval). Coolant Flush: Every 2-3 years or as per manual recommendations. Fluid Specifications Engine Oil: SAE 5W-30 or 5W-40 synthetic recommended (BMW Longlife-01 or equivalent, check manual for specific viscosity grade based on climate). Coolant: BMW Blue Antifreeze/Coolant (G48) or equivalent, mixed 50/50 with distilled water. Brake Fluid: DOT 4 (BMW P/N 81 22 9 400 802) Known Issues Cooling System: Plastic coolant expansion tanks and radiators are prone to cracking with age. Water pump failure. Engine M50: VANOS (Variable Valve Timing) solenoid failure or seal wear leading to rough idle or loss of low-end torque. Oil leaks from valve cover gasket and oil pan gasket. Eccentric shaft sensor failure. Suspension: Worn control arm bushings, ball joints, and rear subframe bushings are common. Electrical: EWS (Electronic Immobilizer) system issues, Door module failures, OBC (On-Board Computer) pixelation. Heater...