🏷️ Basic Information Identification Make: BMW Model: 525i Year: 1987 Product Name: BMW 525i 1987 Best Service Repair Manual Codes Chassis Code: E30 (for 525i model designation in this era, though primarily associated with the 3 Series, BMW used similar engine families. For a 5 Series of this era, it would typically be E28 chassis. This product likely refers to an engine variant within the 5 Series, possibly a 525e or 528e in some markets, or an engine swap context. Clarification needed if it's strictly a 5 Series E28 model. Assuming the product name implies E28 525i/e variant) Engine Code Family: M20 (likely for the 525i/e in this period) 👋 Introduction Market Position Era Positioning: The BMW 5 Series (E28 chassis for this period) represented BMW's mid-size luxury sedan offering, positioned as a sophisticated, driver-focused alternative to mainstream executive cars. The 525i variant offered a blend of performance and refinement. Competitive Analysis Key Competitors: Mercedes-Benz W124 E-Class, Audi 100/200, Jaguar XJ6, Volvo 700 Series. Key Features Driving Dynamics: Renowned for its balanced chassis, responsive steering, and rear-wheel-drive dynamics, offering a superior driving experience for its class. Powertrain Refinement: The M20 inline-six engine, while not the most powerful in BMW's history, offered smooth operation and respectable torque delivery, coupled with efficient Bosch fuel injection. 📋 Manual Details Coverage Areas Manual Type: Factory Service Repair Manual Language: English Format: Downloadable PDF Page Count Estimated Page Count: Hundreds (specific count varies by factory documentation, typically 1000+ pages for comprehensive coverage) Print Capability: Printable in its entirety or selected pages 📖 Manual Coverage Systems Covered Powertrain: Engine (M20 variants: M20B25), Fuel System (Bosch L-Jetronic/Motronic), Ignition System, Exhaust System, Cooling System, Lubrication System Transmission: Manual Transmission (Getrag 260), Automatic Transmission (ZF 4HP22), Drivetrain (Rear Wheel Drive, Driveshaft, Differential) Chassis: Suspension (Front McPherson Strut, Rear Semi-Trailing Arm), Steering System (Power Steering), Brakes (Front Discs, Rear Discs, ABS), Wheels and Tires Electrical: Wiring Diagrams, Lighting System, Charging System (Alternator, Battery), Starting System, Instrumentation, ECU (Engine Control Unit), Fuses and Relays Body: Exterior Body Panels, Interior Trim, Doors, Windows, Seats, Climate Control System (HVAC), Body Sealing Procedures Included Routine Maintenance: Oil Changes, Filter Replacements, Spark Plug Service, Fluid Checks and Replacements (Coolant, Brake Fluid, Power Steering Fluid, Transmission Fluid) Repair Procedures: Engine Overhaul, Cylinder Head Service, Fuel Injector Replacement, Alternator Rebuild, Brake Caliper Service, Suspension Component Replacement, Transmission Overhaul Diagnostics: Troubleshooting Charts, Symptom-Based Diagnostics, Fault Code Interpretation (if applicable to Bosch Motronic), Electrical System Testing Specifications: Torque Values, Clearances, Timing Specifications, Fluid Capacities, Electrical Component Resistances Technical Depth Depth Level: Comprehensive Factory Level (covers everything from basic maintenance to complete engine and transmission rebuilds, including detailed electrical schematics and diagnostic procedures) 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format) Print Quality PDF Quality: High-resolution scans of original factory documents, ensuring clarity of text and diagrams Binding Type Binding For Download: N/A (Digital Download) Paper Type Paper Type For Print: Suitable for standard office printing paper (A4 or Letter) Searchability Text Search: Likely text-searchable if OCR (Optical Character Recognition) was applied during PDF creation, allowing quick finding of specific terms. ⚙️ Engine Specifications Primary Engine Engine Code: M20B25 Engine Type: Inline 6-Cylinder, SOHC (Single Overhead Camshaft) Displacement: 2494 cc (2.5 Liters) Performance Horsepower: Approx. 171 hp @ 5800 rpm (for M20B25, variations may exist) Torque: Approx. 220 Nm (162 lb-ft) @ 4300 rpm (for M20B25, variations may exist) Fuel System Fuel Delivery: Bosch Motronic Fuel Injection (likely Motronic 1.3) Fuel Type: Unleaded Gasoline (Octane rating as per BMW specification for the era, typically 91 RON or higher) Cooling System Coolant Type: BMW Blue Antifreeze/Coolant (or equivalent silicate-free, ethylene glycol-based) Lubrication System Oil Type: API SG, ACEA A2/B2 or higher, viscosity 15W-40 or 10W-40 (refer to manual for exact BMW approval) Oil Capacity: Approx. 4.25 Liters (4.5 US Quarts) with filter change Ignition System Spark Plugs: Bosch W8AC or equivalent (refer to manual for precise part number) 🔧 Transmission Standard Transmission Type: 5-Speed Manual Transmission (Getrag 260) Optional Transmission Type: 4-Speed Automatic Transmission (ZF 4HP22) Features Manual Fluid Type: API GL-4 SAE 75W-90 or SAE 80W-90 gear oil (refer to manual for specific BMW approval) Automatic Fluid Type: Dexron II (or equivalent specified ATF) 📐 Dimensions Exterior Length: Approx. 4620 mm (181.9 in) Width: Approx. 1700 mm (66.9 in) Height: Approx. 1415 mm (55.7 in) Wheelbase: Approx. 2700 mm (106.3 in) Weights Curb Weight: Approx. 1400-1500 kg (3086-3307 lbs) depending on transmission and options Gross Vehicle Weight Rating: Refer to vehicle's VIN plate or manual 🛡️ Safety Features Ratings Crash Test Data: As a 1987 vehicle, formal crash test ratings (like NHTSA or IIHS) were less standardized and comprehensive than today. However, the E28 chassis was known for its robust safety cell construction. Active Features ABS: Anti-lock Braking System (ABS) was available as an option on most...