🏷️ Basic Information Identification Make: BMW Model: 5 Series Model Variant: 525i Year: 1987 Codes Chassis Code: E34 👋 Introduction Market Position Segment: Executive/Luxury Mid-size Sedan Target Audience: Performance-oriented luxury car buyers valuing driving dynamics and build quality Competitive Analysis Key Competitors: Mercedes-Benz W124 E-Class, Audi V8 Quattro, Jaguar XJ Key Features Engineering: Renowned BMW driving dynamics, balanced chassis, high-quality interior materials Innovation: Early adoption of advanced engine management and chassis technologies 📋 Manual Details Coverage Areas Engine: All variants for 525i Transmission: All variants for 525i Body Style: Sedan (E34) Trim Levels: All available for 525i Page Count Estimated Pages: 1000+ Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, timing, valve adjustments, lubrication, cooling Engine Management: Fuel injection (Bosch Motronic), ignition system, sensors, actuators, ECU diagnostics Transmission Manual: Clutch, gearbox overhaul, shift mechanism, maintenance Transmission Automatic: Torque converter, gearbox overhaul, shift control, maintenance, fluid service Brakes: Hydraulic system, ABS (if equipped), brake pads, rotors, lines, calipers, parking brake Suspension: Front struts, rear multi-link, shock absorbers, springs, bushings, alignment Steering: Power steering system, steering rack, column, tie rods, universal joints Electrical System: Battery, alternator, starter, wiring diagrams, lighting, fuses, relays, diagnostic connectors Body And Chassis: Body panels, doors, windows, sunroof, interior trim, chassis components Heating Ventilation Air Conditioning: HVAC system components, blower motor, climate control, refrigerant service Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks, spark plug replacement, belt inspection Diagnostic Troubleshooting: Step-by-step diagnostic procedures for common and uncommon issues Component Replacement: Detailed instructions for replacing major and minor components Rebuilding Procedures: Comprehensive guides for rebuilding engines, transmissions, and other major assemblies Electrical Troubleshooting: Wiring diagrams analysis, fault finding for electrical systems Specifications And Tolerances: Torque specifications, clearances, and alignment data Technical Depth Depth: Comprehensive, covering all aspects from basic maintenance to full engine and transmission rebuilds. Includes advanced diagnostics and repair procedures. 📊 Manual Specifications File Format File Type: PDF Searchable Text: Likely searchable if OCR processed Print Quality Quality: Dependent on source scan, but typically professional technical document quality Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Code: M30B34 (often the basis for the 525i variant in some markets or related models) Engine Type: Inline 6-cylinder, SOHC Displacement: 2.5 Liters (2494 cc) Bore X Stroke: 84.0 mm x 75.0 mm Performance Horsepower: Approx. 168-170 hp @ 5,300-6,000 rpm (market dependent) Torque: Approx. 226-230 Nm (167-170 lb-ft) @ 3,250-4,000 rpm (market dependent) Fuel System Injection: Bosch Motronic (likely Motronic 1.3) Fuel Type: Unleaded gasoline (RON 95 or higher recommended) 🔧 Transmission Standard Type: Getrag 260 5-speed Manual Optional Type: ZF 4HP22 4-speed Automatic Features Manual Ratios: Refer to manual for specific gear ratios Automatic Modes: Standard Drive, Economy, Sport (market dependent) 📐 Dimensions Exterior Length: Approx. 4775 mm (188.0 in) Width: Approx. 1751 mm (68.9 in) Height: Approx. 1410 mm (55.5 in) Wheelbase: Approx. 2830 mm (111.4 in) Weights Curb Weight: Approx. 1500-1600 kg (3300-3530 lbs), varies by transmission and options 🛡️ Safety Features Ratings Crash Test History: Limited official crash test data available for this era, but E34 known for robust chassis Active Features ABS: Optional Anti-lock Braking System (ABS) Passive Features Airbags: Driver's side airbag was optional/became standard later in the generation Seatbelts: Three-point front seatbelts, rear seatbelts 💡 Technology Features Infotainment Audio System: Factory premium sound system available, often with cassette player and AM/FM radio. Upgradeable to modern units. Climate Control: Manual or optional automatic climate control systems. Driver Assistance Cruise Control: Standard or optional cruise control system. Connectivity Diagnostic Port: BMW's proprietary diagnostic connector for engine management and other systems. 🔧 Maintenance Service Intervals Oil Change: Every 10,000-15,000 km (6,000-9,000 miles) or annually. Consult manual for specific intervals. Spark Plugs: Every 30,000-50,000 km (18,000-30,000 miles), depending on plug type. Coolant Flush: Every 2-3 years or 40,000-60,000 km (25,000-37,000 miles). Fluid Specifications Engine Oil: API SG/SH, ACEA A2/A3, SAE 5W-30 or 5W-40 synthetic recommended for optimal performance and protection. Consult manual for specific viscosity. Coolant: BMW Blue (G48 ethylene glycol-based) or equivalent mixed 50/50 with distilled water. Automatic Transmission Fluid: ZF TE-ML 04D or DEXRON III (check manual for exact specification) Manual Transmission Fluid: GL-4 SAE 75W-90 or 90 Power Steering Fluid: Pentosin CHF 11S or equivalent ATF Dexron III Known Issues Coolingsystem: Plastic coolant expansion tanks can become brittle and crack; water pump seals can fail. Engine Management: MAF sensor issues, idle control valve problems, coil pack failures on later models (though less common on 87 525i). Suspension: Wear in control arm bushings, rear trailing arm bushings, and front sway bar links leading to steering looseness and clunks. Electrical: Corrosion in electrical connectors, fuel pump relay failures, HVAC blower resistor failure. Body: Rust in common areas like rocker...