🏷️ Basic Information Identification Make: BMW Model: 5 Series Chassis Code: E34 Year: 1990 Generation Generation: Second Generation (E34) Codes Platform: E34 👋 Introduction Market Position Positioning: The E34 represented BMW's entry into the executive sedan market, known for its advanced technology, driving dynamics, and luxurious appointments for its era. Competitive Analysis Competitors: Competed directly with rivals like the Mercedes-Benz W124 E-Class, Audi V8, and Jaguar XJ. Key Features Design Philosophy: Evolved from the E28, the E34 featured a more aerodynamic design, improved chassis dynamics, and enhanced safety features. Target Audience: Professionals, executives, and driving enthusiasts seeking a blend of performance, comfort, and build quality. 📋 Manual Details Coverage Areas Coverage: Complete repair and service information for BMW E34 1990 models. Page Count Page Count: Varies by specific edition, typically 1000+ pages for factory service manuals. Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: Print 📖 Manual Coverage Systems Covered Engine: Detailed diagnosis, repair, and overhaul procedures for M20, M30, and M50 engines. Transmission: Manual and automatic transmission repair, adjustment, and replacement. Electrical: Comprehensive wiring diagrams, troubleshooting for electrical components, lighting, and accessories. Suspension: Front and rear suspension component diagnosis, repair, and alignment procedures. Brakes: Brake system inspection, repair, ABS system diagnostics, and component replacement. Steering: Power steering system repair, steering linkage diagnosis, and alignment. Cooling System: Radiator, fan, thermostat, and water pump service and repair. Fuel System: Fuel injection system diagnosis and repair, fuel pump and injector service. Exhaust System: Exhaust manifold, catalytic converter, and muffler repair and replacement. Bodywork: Body panel alignment, door and window mechanisms, interior trim removal and installation. Climate Control: HVAC system diagnosis, refrigerant service, heater core, and AC compressor repair. Procedures Included Maintenance: Regular service intervals, fluid changes, filter replacements, and inspections. Troubleshooting: Diagnostic charts, common problems and solutions, fault code interpretation. Repair: Step-by-step repair instructions for all major vehicle systems. Disassembly Assembly: Detailed instructions for removing and reinstalling components. Adjustment: Calibration and adjustment procedures for various systems. Installation: Procedures for installing new or replacement parts. Technical Depth Depth: Comprehensive coverage from basic maintenance to in-depth engine and transmission rebuilds. 📊 Manual Specifications File Format Digital Format: N/A (This is a print manual) Print Quality Paper Quality: High-quality, durable paper stock suitable for workshop environments. Binding Type Binding: Stapled, perfect bound, or comb-bound depending on the publisher. Paper Type Page Type: Glossy or matte paper with clear, high-resolution illustrations and diagrams. ⚙️ Engine Specifications Primary Engine Engine Options: 1990 models typically featured the M20 inline-six (e.g., 520i, 525i), M30 inline-six (e.g., 530i, 535i), and the M50 inline-six (introduced later in the E34 lifecycle, but relevant for later models covered by general E34 manuals). Performance 525I Performance: Approx. 168-170 hp and 180-181 lb-ft torque (M20B25). 535I Performance: Approx. 208-211 hp and 225-228 lb-ft torque (M30B34). Fuel System Injection Type: Bosch Motronic electronic fuel injection. Fuel Type: Unleaded gasoline. 🔧 Transmission Standard Standard Transmission: 5-speed manual transmission (Getrag 260/5). Optional Optional Transmission: 4-speed automatic transmission (ZF 4HP22). Features Rear Wheel Drive: All E34 models were rear-wheel drive. 📐 Dimensions Exterior Wheelbase: 111.5 inches (2832 mm). Length: 191.1 inches (4855 mm). Width: 70.2 inches (1783 mm). Height: 55.9 inches (1420 mm). Weights Curb Weight: Approx. 3500-3800 lbs (1588-1724 kg) depending on engine and equipment. 🛡️ Safety Features Ratings Crash Testing: While formal NHTSA ratings for this era are less comprehensive, BMW's reputation for robust construction was a key selling point. Active Features ABS: Anti-lock Braking System (ABS) was standard or optional on most models. Passive Features Airbags: Driver's side airbag became standard in later E34 production, potentially optional or unavailable on early 1990 models. Seatbelts: Front and rear seat belts with pre-tensioners. 💡 Technology Features Infotainment Audio System: Optional premium sound systems, often from Blaupunkt or BMW's own Hi-Fi systems. Driver Assistance Cruise Control: Electronic cruise control was available on most models. Connectivity Early Features: Features like climate control, power accessories, and optional heated seats were considered advanced for the time. 🔧 Maintenance Service Intervals Oil Change: Typically every 5,000-7,500 miles or annually, depending on driving conditions. Spark Plugs: Intervals vary by plug type, generally 30,000-60,000 miles. Coolant Flush: Recommended every 2-3 years or 30,000-50,000 miles. Fluid Specifications Engine Oil: API SG or higher, SAE 5W-30 or 10W-40 recommended (check owner's manual for specific viscosity). Coolant: BMW Blue or Green coolant (ethylene glycol-based) mixed 50/50 with distilled water. Automatic Transmission Fluid: ZF TE-ML 11A or 11B specification fluid (e.g., Dexron III equivalent). Manual Transmission Fluid: GL-4 or GL-5 rated gear oil, typically 75W-90. Known Issues Cooling System Leaks: Common issue with plastic radiator end tanks and coolant hoses degrading over time. Head Gasket: Can be susceptible to failure, especially on higher-mileage M30 engines. Oil Pan Gasket: Frequent source of oil leaks due to age and material degradation. Window Regulators: Plastic components can break,...