🏷️ Basic Information Identification Make: BMW Model: 525i Year: 1987 Codes Chassis Code: E34 👋 Introduction Market Position Segment: Executive/Luxury Mid-size Sedan Target Audience: Enthusiasts, DIY mechanics, professional technicians Competitive Analysis Competitors: Mercedes-Benz W124 E-Class, Audi 100/200, Jaguar XJ, Volvo 740/760 Key Features Design Philosophy: Sporty handling, build quality, advanced engineering for its era Platform: E34 chassis introduced significant advancements in ride comfort and handling 📋 Manual Details Coverage Areas Engine Coverage: M20B25 Inline 6-cylinder (2.5L) Transmission Coverage: Getrag 260 5-speed manual, ZF 4HP22 4-speed automatic Chassis Systems Coverage: Suspension, steering, brakes (ABS included), drivetrain, exhaust Electrical Systems Coverage: Engine management, lighting, instrumentation, power accessories, diagnostics Bodywork Coverage: Exterior panels, interior trim, glass, seals Page Count Estimated Pages: 1000+ Manual Type Type: Full Service and Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, cylinder head, block, pistons, crankshaft, camshaft, timing chain/belt, lubrication system, cooling system Engine Fuel System: Bosch Motronic fuel injection, injectors, fuel pump, fuel pressure regulator, fuel filter, emissions control Transmission Manual: Clutch, gearbox internal components, shift linkage, removal and installation Transmission Automatic: Torque converter, hydraulic control unit, valve body, planetary gear sets, removal and installation, fluid and filter changes Brake System: Hydraulic system, master cylinder, brake boosters, calipers, pads, rotors, ABS (Anti-lock Braking System) diagnosis and repair Suspension System: Front struts, rear shock absorbers, control arms, bushings, ball joints, sway bars, wheel bearings Steering System: Power steering pump, steering rack, tie rods, steering column, wheel alignment procedures Electrical System Diagnosis: Wiring diagrams, fuse box layouts, relay functions, troubleshooting techniques, component testing HVAC System: Heating, ventilation, air conditioning components, refrigerant system, blower motor, controls Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks, spark plug replacement, belt inspection and replacement Troubleshooting Diagnostics: Step-by-step diagnostic flowcharts for common problems, fault code interpretation (where applicable) Component Rebuild: Detailed instructions for rebuilding engine, transmission, differential, and steering components Repair Replacement: Removal, installation, and adjustment procedures for all major and minor vehicle components Electrical Component Testing: Testing of sensors, actuators, ECUs, starter, alternator, and other electrical parts Body Repair: Procedures for dent repair, panel replacement, glass installation, and interior trim removal/installation Wheel Alignment: Specifications and procedures for front and rear wheel alignment Technical Depth Depth: Comprehensive (from basic maintenance to full engine/transmission rebuilds) Diagnostic Level: Advanced diagnostic procedures for all major systems, including electrical and fuel injection Torque Specifications: Detailed torque values for all critical fasteners Clearances Tolerances: Specifications for engine component clearances, valve lash, etc. 📊 Manual Specifications File Format Format: Searchable PDF Printability: Printable pages Print Quality Image Resolution: High-resolution images and diagrams Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code: M20B25 Configuration: Inline 6-cylinder, DOHC Displacement: 2494 cc (2.5 Liters) Bore X Stroke: 84.0 mm x 75.0 mm Compression Ratio: 8.5:1 Performance Horsepower SAE Net: 168 hp @ 5800 rpm Torque SAE Net: 164 lb-ft @ 4300 rpm Fuel System Injection System: Bosch Motronic ML-S (Lambda-Sensing) Fuel Type: Unleaded gasoline (Premium recommended) Ignition System: Electronic ignition with knock control 🔧 Transmission Standard Type: Getrag 260 5-speed manual Optional Type: ZF 4HP22 4-speed automatic Features Manual Clutch Type: Hydraulically actuated single dry plate Automatic Modes: Sport and Economy modes Final Drive Ratio: 3.46:1 (Manual), 3.23:1 (Automatic) 📐 Dimensions Exterior Length: 187.0 in (4750 mm) Width: 69.1 in (1755 mm) Height: 56.5 in (1435 mm) Wheelbase: 111.5 in (2832 mm) Weights Curb Weight: 3420 - 3570 lbs (1551 - 1619 kg) (Varies by transmission and equipment) 🛡️ Safety Features Ratings NHTSA Frontal Impact: Not extensively rated by NHTSA for this era, but considered very safe for its time. Active Features ABS: Standard Anti-lock Braking System (ABS) Traction Control: Optional on some models (ASC - Automatic Stability Control) Passive Features Airbags: Driver's side airbag (optional, standard on later E34 models) Seat Belts: 3-point front and rear seat belts Body Structure: Reinforced safety cage and crumple zones 💡 Technology Features Infotainment Audio System: Optional BMW Bavaria C Professional RDS radio/cassette player. Navigation: N/A (Not available for this model year) Driver Assistance Cruise Control: Optional Connectivity Connectivity Features: N/A (No modern connectivity features like Bluetooth or USB) 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000-7,500 miles or annually Spark Plug Replacement: Approximately 30,000 miles Coolant Flush: Every 2 years or 30,000 miles Transmission Fluid Change: Manual: Inspect periodically. Automatic: Every 30,000-50,000 miles Fluid Specifications Engine Oil Type: API SG or higher, SAE 15W-40 or 10W-40 (check manual for specific conditions) Engine Oil Capacity: 5.5 Liters (with filter) Coolant Type: BMW Blue antifreeze (Glysantin G48 compatible) Brake Fluid Type: DOT 3 or DOT 4 Power Steering Fluid: Dexron II or equivalent ATF Manual Transmission Fluid: SAE 75W-90 synthetic gear oil (BMW approved) Automatic Transmission Fluid: Dexron II or Dexron III Known...