🏷️ Basic Information Identification Make: BMW Model: 525i Model Code: E34 Generation Generation Name: E34 Codes Engine Codes: M20B25 👋 Introduction Market Position Target Audience: Do-it-yourselfers and experienced mechanics seeking official BMW repair data. Competitive Analysis Value Proposition: Official BMW workshop data at a fraction of the cost of dealership service manuals. Key Features Feature 1: Comprehensive coverage of all major vehicle systems. Feature 2: Step-by-step instructions with diagrams and photos. Feature 3: Detailed electrical diagrams and troubleshooting guides. 📋 Manual Details Coverage Areas Applicable Model Years: 1981-1991 Page Count Estimated Page Count: Hundreds of pages (printable) Manual Type Type: Official BMW Service Manual / Workshop Manual / Repair Manual / FSM (Factory Service Manual) Language Language: English Format Format: Digital (printable) 📖 Manual Coverage Systems Covered Engine: Detailed repair, overhaul, diagnostics, and tuning for the M20B25 engine. Cooling System: Radiator, water pump, thermostat, hoses, fan, coolant specifications, and troubleshooting. Fuel And Emissions: Fuel injection system (Bosch Motronic), fuel pump, injectors, fuel filter, EVAP system, catalytic converter, emissions control components. Transmission: Manual and automatic transmission service, overhaul, fluid types, and shift linkage adjustments. Steering: Power steering system, pump, rack and pinion, fluid specifications, alignment procedures. Suspension: Front and rear suspension components, struts, shock absorbers, control arms, bushings, springs, alignment. Brakes: Disc brake systems (front and rear), hydraulic system, ABS (Anti-lock Braking System) components, bleeding procedures, pad and rotor replacement. Body: Body panel repair, rust prevention, door mechanisms, glass replacement, bumper repair, underbody protection. HVAC: Heating, ventilation, and air conditioning (HVAC) system, compressor, refrigerant, evaporator, heater core, climate controls. Body Electrical: Wiring diagrams, lighting systems, power windows, power locks, mirrors, wipers, horn, interior lighting. Engine Electrical: Ignition system, starter motor, alternator, battery, fuses, relays, engine control unit (ECU) diagnostics. Restraints: Seat belts, airbag system components (if applicable to specific models within the range), pre-tensioners. Procedures Included Maintenance: Routine maintenance tasks, oil changes, filter replacements, spark plug service, fluid level checks, lubrication points. Diagnostics: Troubleshooting guides for common problems, diagnostic procedures for electrical and mechanical issues, fault code interpretation (where applicable). Repair: Step-by-step instructions for component removal, repair, reassembly, and installation across all major vehicle systems. Rebuilding: Detailed procedures for engine and transmission rebuilding, including torque specifications and clearances. Wiring: Comprehensive electrical troubleshooting and repair, including complete wiring diagrams for various circuits. Refurbishment: Procedures for bodywork, interior refurbishment, and restoration tasks. Technical Depth Depth: Complete workshop-level detail, suitable for both DIY enthusiasts and professional mechanics. Illustrations: Hundreds of photos and step-by-step diagrams for visual guidance. Completeness: Covers complete disassembly of the machine, implying a high level of detail. 📊 Manual Specifications File Format Digital Format: Likely PDF or similar, allowing for selective printing. Print Quality Print Capability: Printable in its entirety or page by page. Binding Type Binding: N/A (digital, user prints and binds) Paper Type Paper Recommendation: N/A (user choice for printing) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-cylinder, SOHC Engine Code: M20B25 Displacement: 2.5 Liters (2494 cc) Performance Horsepower Approx: 169 hp @ 5800 rpm (Varies slightly by year/market) Torque Approx: 225 Nm (166 lb-ft) @ 4300 rpm (Varies slightly by year/market) Fuel System Fuel Delivery: Bosch Motronic fuel injection Fuel Type: Unleaded gasoline 🔧 Transmission Standard Transmission Type: 5-speed manual (Getrag 260) Optional Transmission Type: 4-speed automatic (ZF 4HP22) Features Clutch Type: Hydraulic, single dry plate 📐 Dimensions Exterior Length: Approx. 4719 mm (185.8 in) Width: Approx. 1751 mm (68.9 in) Height: Approx. 1410 mm (55.5 in) Weights Curb Weight Approx: 1450-1550 kg (3197-3417 lbs) depending on transmission and options Wheelbase: Approx. 2795 mm (110.0 in) 🛡️ Safety Features Ratings Crash Test Data: Limited specific crash test data available for this era compared to modern standards. Focus on structural integrity and passive safety features of the time. Active Features ABS: Available on later models within this range, integrated into the braking system. Passive Features Airbags: Driver airbag became standard on later models within this production run; passenger airbags were optional or absent. Seatbelts: 3-point front seatbelts, rear lap belts standard, 3-point rear belts optional on some models. Chassis Structure: Reinforced safety cage, crumple zones. 💡 Technology Features Infotainment Audio System: Original BMW premium audio systems, cassette player, often with amplifier options. Radio removal procedures covered. Driver Assistance Cruise Control: Standard electronic cruise control on many models. Connectivity Diagnostic Ports: OBD-I diagnostic port (or earlier proprietary BMW connectors) for engine diagnostics. Manual details troubleshooting for 'service engine soon' light. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500 - 10,000 miles (12,000 - 15,000 km) or annually, whichever comes first, depending on driving conditions. Transmission Fluid Interval: Manual: Check per manual, typically long-life. Automatic: Check per manual, often recommended at 60,000 miles (100,000 km). Fluid Specifications Engine Oil: BMW Longlife-01 (or equivalent for the era, e.g., 5W-30, 5W-40 synthetic) - consult manual for exact specifications by year....