🏷️ Basic Information Identification Make: BMW Model: 525i Year: 1990 Product Name: BMW 525 525i 1990 Service Repair Workshop Manual Generation Chassis Code: E34 Generation Name: Second Generation (E34) Codes Engine Code Prefix: M20 Engine Code Specific: 2.5 L M20B25 👋 Introduction Market Position Segment: Executive mid-size sedan Key Selling Points: Sporty handling, refined interior, strong straight-six engine, advanced engineering for its era Competitive Analysis Competitors: Mercedes-Benz W124 E-Class, Audi V8 (D1), Lexus LS 400 (introduced later in the generation) Key Features Design Philosophy: Bauhaus-inspired design, aerodynamic efficiency, driver-centric cockpit Chassis Technology: Advanced multi-link rear suspension, sophisticated front suspension, often lauded for its ride and handling balance 📋 Manual Details Coverage Areas Primary Coverage: Comprehensive service, repair, and maintenance Secondary Coverage: Diagnostics, troubleshooting, electrical systems, bodywork, specifications Page Count Estimated Pages: Detailed page count not specified in product description; typically 800-1200 pages for comprehensive E34 manuals. Manual Type Type: Service Repair Workshop Manual Language Language: English (presumed, based on typical market offerings for BMW manuals) Format Format: Digital (PDF likely), potentially also available in print. 📖 Manual Coverage Systems Covered Engine Management: Engine overhaul, fuel injection (Bosch Motronic), ignition system, cooling system, lubrication system, exhaust system Powertrain: Manual transmission (Getrag 260), automatic transmission (ZF 4HP22 EH), clutch, driveshafts, differential Suspension Steering: Front suspension (MacPherson struts), rear suspension (multi-link), power steering system, steering column, wheel alignment Brakes: Front disc brakes (ventilated), rear disc brakes, anti-lock braking system (ABS II), brake fluid specifications Electrical: Battery, alternator, starter motor, lighting systems, wiring diagrams, fuses and relays, instrument cluster, power windows, central locking Body Chassis: Body panel removal and installation, door mechanisms, interior trim, bumpers, sunroof, chassis lubrication Procedures Included Maintenance: Oil changes, filter replacements, spark plug replacement, coolant flushes, belt replacement, brake pad replacement Diagnostics: Troubleshooting guides, symptom-based diagnostics, common fault finding, diagnostic trouble codes (if applicable to era) Repair: Engine rebuilds, transmission overhauls, suspension component replacement, brake system repair, electrical component diagnosis and replacement Installation: Accessory installation, component replacement procedures Technical Depth Depth Level: Comprehensive, suitable for professional mechanics and advanced DIY enthusiasts Detail Level: Detailed torque specifications, component tolerances, diagnostic flowcharts, wiring diagrams 📊 Manual Specifications File Format File Type: Likely PDF; searchable text is a common feature of quality digital manuals. Print Quality Quality: High-resolution scans for clear text and diagrams if digital; print quality is variable if a printed version. Binding Type Binding: Not applicable if digital; for print, typically spiral-bound or perfect-bound. Paper Type Paper Quality: Not applicable if digital; traditionally printed on durable, high-quality paper suitable for workshop environments. ⚙️ Engine Specifications Primary Engine Engine Type: Inline-6 Cylinder, Naturally Aspirated Engine Code: M20B25 Displacement: 2494 cc (2.5 Liters) Bore X Stroke: 84 mm x 75 mm Compression Ratio: 8.8:1 Valvetrain: SOHC (Single Overhead Camshaft), 2 valves per cylinder Performance Horsepower: 170 hp (125 kW) @ 5800 rpm Torque: 220 Nm (162 lb-ft) @ 4300 rpm Fuel System Fuel Delivery: Bosch Motronic ML-1.3 Fuel Injection Fuel Type: Unleaded Premium Gasoline (RON 91 or higher recommended) Engine Management Ignition System: Distributorless Electronic Ignition (depending on specific market variant) 🔧 Transmission Standard Type: 5-Speed Manual Transmission (Getrag 260/5) Optional Type: 4-Speed Automatic Transmission (ZF 4HP22 EH) Features Clutch: Hydraulically operated single dry plate clutch Transmission Fluid Manual: BMW MTF LT-2 or equivalent (e.g., Pentosin MTF 2) Transmission Fluid Automatic: ATF Dexron III or equivalent 📐 Dimensions Exterior Length: 4720 mm (185.8 in) Width: 1751 mm (68.9 in) Height: 1410 mm (55.5 in) Wheelbase: 2799 mm (110.2 in) Front Track: 1475 mm (58.1 in) Rear Track: 1475 mm (58.1 in) Weights Curb Weight: 1540 kg (3395 lbs) - Manual Transmission Gross Vehicle Weight Rating: Not explicitly specified, typically around 2000-2100 kg Wheel Bolt Pattern: 5 x 120 mm Wheel Size: 15x7 inches (standard), 15x7.5 or 16 inches optional Tire Size Standard: 205/65R15 🛡️ Safety Features Ratings Crash Test Data: Limited specific US NHTSA ratings available for this European market-focused vehicle; generally considered robust for its era. Active Features Braking System: Four-wheel disc brakes with Bosch II Anti-lock Braking System (ABS) Steering System: Servotronic power steering (variable assistance on some models) Passive Features Airbags: Driver's side airbag was optional or standard on later models of this generation, not guaranteed on all 1990 US 525i. Seatbelts: Three-point inertia-reel seatbelts with pretensioners (driver and front passenger) Body Construction: Reinforced safety cage, crumple zones 💡 Technology Features Infotainment Audio System: Standard BMW AM/FM cassette player; optional CD player, upgraded Hi-Fi sound systems. On Board Computer: Optional On-Board Computer (OBC) displaying fuel consumption, range, average speed, etc. Driver Assistance ABS: Standard Bosch II Anti-lock Braking System (ABS) Cruise Control: Standard or optional depending on trim level. Connectivity Connectivity Features: Limited by modern standards; primarily focused on internal diagnostics and basic vehicle functions. 🔧 Maintenance Service Intervals Oil Change: Typically every 7,500 - 10,000 miles (12,000 -...