🏷️ Basic Information Identification Make: BMW Model: 5 Series Chassis Code: E34 Model Year: 1991 Market Segment: Executive Sedan/Wagon 👋 Introduction Market Position Positioning: The BMW E34 represented the pinnacle of executive luxury and performance in its era, competing with rivals like the Mercedes-Benz W124 E-Class and Audi V8 Quattro. Competitive Analysis Competitors: Mercedes-Benz W124, Audi V8/A8, Lexus LS400, Volvo 700/900 series. Key Features Design: Iconic Chris Bangle-influenced design, aerodynamic efficiency, balanced chassis dynamics. Engineering: Renowned BMW inline-six engines, sophisticated suspension systems, driver-focused ergonomics. Target Audience: Discerning drivers seeking a blend of luxury, performance, and build quality. 📋 Manual Details Coverage Areas Coverage Scope: All Models, All Engines, All Transmissions Page Count Estimated Page Count: Likely 1000+ pages (typical for comprehensive workshop manuals) Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel injection (DME/Motronic), ignition, cooling, exhaust, manual and automatic transmissions, clutch, driveshafts, differentials, axles. Chassis: Suspension (front & rear, independent), steering system (power assisted), braking system (ABS components), wheel bearings, subframes. Electrical: 12V electrical system, battery, alternator, starter motor, lighting systems (headlights, taillights, interior), fuses, relays, wiring diagrams, instrument cluster, body control modules (BCM), diagnostics (OBD-I). Body: Body panels, doors, hood, trunk lid, bumpers, glass, seals, interior trim, seats, HVAC system (climate control), power accessories (windows, mirrors, seats, sunroof). Procedures Included Maintenance: Scheduled maintenance intervals, oil changes, filter replacements (oil, air, fuel), spark plug replacement, fluid checks and changes (coolant, brake fluid, power steering fluid, transmission fluid, differential fluid). Repair: Engine rebuilds, head gasket replacement, transmission overhauls, brake component replacement (rotors, pads, calipers), suspension component replacement (shocks, struts, control arms), electrical component repair, body panel repair. Troubleshooting: Diagnostic procedures for engine performance issues, electrical faults, cooling system problems, transmission shifting issues, ABS malfunctions, based on symptoms and diagnostic codes (OBD-I). Technical Depth Depth: Comprehensive: Covers from routine maintenance to complete engine and transmission rebuilds, including detailed torque specifications, assembly procedures, and diagnostic flowcharts. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable PDF for easy navigation Printability: Printable pages for workshop use Print Quality Quality: High-resolution scans of original factory documentation Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Family: M20 and M30 inline-six (petrol), M51 turbodiesel (later models, though likely not covered in 1991 specific manual for all variants) Common Engines 1991: M20B25 (2.5L 168hp), M30B35 (3.5L 208hp) Performance Engine Layout: Inline-six, front-engine, rear-wheel drive Compression Ratio M20B25: 8.5:1 Compression Ratio M30B35: 8.0:1 Fuel System Injection System: Bosch Motronic electronic fuel injection and ignition control Fuel Type: Unleaded gasoline (Premium Octane recommended) Engine Management ECU Type: DME (Digital Motor Electronics) / Motronic 🔧 Transmission Standard Standard Transmission: 5-speed manual (Getrag 260) Optional Optional Transmission: 4-speed automatic (ZF 4HP22 EH) Features Drive Type: Rear-Wheel Drive (RWD) Automatic Transmission Modes: Standard, Sport (S) and Economy (E) modes Fluid Specifications Manual Transmission Fluid: BMW Manual Transmission Fluid (e.g., Castrol SAF-XJ or equivalent GL-4/GL-5 rated gear oil) Automatic Transmission Fluid: BMW ATF LT-3 or LT-7 (e.g., Dexron II/III equivalent) 📐 Dimensions Exterior Body Styles: 4-door Sedan, 5-door Touring (Wagon) Wheelbase: Approx. 2760 mm (108.7 inches) Length: Approx. 4730 mm (186.2 inches) for Sedan Width: Approx. 1750 mm (68.9 inches) Height: Approx. 1410 mm (55.5 inches) for Sedan Weights Curb Weight: Approx. 1500-1700 kg (3300-3750 lbs) depending on engine/options Gross Vehicle Weight Rating: Varies by model, typically around 2000-2200 kg 🛡️ Safety Features Ratings Safety Standards: Designed to meet European safety standards of the era. Active Features ABS: Anti-lock Braking System (ABS) standard on most models Traction Control: Automatic Stability Control (ASC) available on some higher-end models Passive Features Airbags: Driver's airbag standard from 1994 onwards, optional earlier; passenger airbag not commonly available in 1991. Seatbelts: 3-point inertia reel seatbelts front and rear Chassis Reinforcement: Reinforced safety cage, crumple zones. 💡 Technology Features Infotainment Audio System: Optional premium Hi-Fi systems from Alpine or Harman Kardon. Stock cassette/radio units with CD changer capability. Navigation: Early factory-installed navigation systems were available on some later E34 models, but rare for 1991. Driver Assistance Cruise Control: Standard cruise control system. Connectivity Onboard Diagnostics: OBD-I (On-Board Diagnostics) system, requiring specialized connectors and software for diagnostics. Comfort Features HVAC: Manual or optional automatic climate control (ECC - Electronic Climate Control). Memory Seats: Optional multi-way power adjustable front seats with memory function for driver's seat. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500-10,000 miles or annually, depending on driving conditions and oil used. Spark Plug Replacement: Every 30,000-60,000 miles depending on plug type (conventional vs. platinum). Coolant Flush: Every 2-3 years or 30,000 miles. Transmission Fluid Change: Manual: Every 60,000 miles; Automatic: Every 40,000-60,000 miles with filter. Fluid Specifications Engine Oil Spec: SAE 5W-30 or 5W-40 synthetic recommended, meeting BMW LL-98 or...