🏷️ Basic Information Identification Make: BMW Model: 7 Series Model Code: E23 Year: 1981 Generation Generation Code: E23 Generation Years: 1977-1986 Codes Chassis Code: E23 👋 Introduction Market Position Vehicle Segment: Full-size luxury sedan Positioning Statement: The E23 7 Series represented BMW's flagship model, offering advanced technology, superior driving dynamics, and luxurious appointments in the executive sedan segment. Competitive Analysis Key Competitors: Mercedes-Benz S-Class (W116/W126), Jaguar XJ, Audi V8 (later models), Cadillac Fleetwood Key Features Manual Value Proposition: Provides dealership-level technical information for DIY repairs, maximizing owner's ability to maintain and repair their vehicle efficiently and cost-effectively. Manual Format Advantage: Single, easily accessible PDF format eliminates the need for multiple physical manuals, offers searchability, and allows for selective printing. Manual Usability: Designed for ease of use, with step-by-step instructions and clear visuals, empowering owners to perform repairs themselves. 📋 Manual Details Coverage Areas Primary Coverage: All models and all repairs A-Z for the 1981 BMW 7 Series (E23) Specific Models Covered: Includes all E23 7 Series variants produced in 1981, encompassing all engine and trim options available that year. Page Count Estimated Pages: Not explicitly stated, but described as 'complete' and 'easy-to-use PDF-manual', implying comprehensive content. Manual Type Type: Service and Repair Manual Authenticity: Factory service manual, identical to those used by dealership technicians. Content Type: Repair, Maintenance, Diagnostics, Specifications, Wiring Schematics Language Language: English Format Format: Digital (PDF) Platform Compatibility: Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac Distribution Method: Speed Download Software Requirements: Adobe PDF Reader and Winzip (free online) File Format File Type: PDF Print Quality Printability: All pages are printable, with the ability to enlarge images for clarity. Binding Type Binding: Not Applicable (Digital Format) Paper Type Paper Type: Not Applicable (Digital Format) 📖 Manual Coverage Systems Covered Engine Systems: Engine, Fuel Service Specifications, Emission Control, Intake Exhaust Cooling, Lube, Ignition Starting Charging Drivetrain Systems: Auto Transmission, Clutch, Manual Transmission, Transfer Propeller Shaft, Drive Shaft, Differential, Axle Suspension Chassis Systems: Tire & Wheel, Brake Control, Brake, Parking Brake, Steering Column, Power Steering Electrical Systems: Electrical, Multiplex/CAN Communication (early implementation), Ignition Starting Charging Comfort And Convenience: Air Condition, Suppl. Restraint System (SRS - limited or absent in early E23), Seat Belt, Engine Immobilizer (unlikely for 1981 E23), Cruise Control, Wiper & Washer, Door Lock, Meter Audio/Visual, Horn, Windshield/Glass Mirror, Instrument Panel, Seat, Engine Hood/Door, Exterior & Interior Body And Trim: Exterior & Interior, Engine Hood/Door, Instrument Panel, Seat, Windshield/Glass Mirror Accessories: Air Condition, Cruise Control, Wiper & Washer, Horn, Door Lock Procedures Included Maintenance Procedures: Routine maintenance, scheduled services, fluid changes, filter replacements, lubrication. Diagnostic Procedures: Troubleshooting, fault diagnosis for all major systems, wiring schematic interpretation. Repair Procedures: Complete step-by-step instructions for component removal, installation, adjustment, and overhaul. Technical Data Provision: Specifications, torque values, clearances, fluid capacities, electrical resistance values. Electrical Diagnostics: Detailed troubleshooting of all electrical systems, including wiring diagrams for accurate diagnosis. Technical Depth Depth: Comprehensive, from basic maintenance to advanced diagnostics and complete mechanical and electrical system repairs. Includes detailed wiring schematics. Illustrations Diagrams: Includes numerous illustrations and diagrams to support step-by-step instructions, aiding in clarity and comprehension. ⚙️ Engine Specifications Primary Engine Engine Options 1981: Primarily M30 inline-six engines. Likely includes the 733i (3.2L) and potentially the 732i (3.2L with Motronic). Engine Code Example: M30B32 Performance Horsepower Estimate 733I: Approx. 197 hp (DIN) / 177 hp (SAE) Torque Estimate 733I: Approx. 210 lb-ft (DIN) / 190 lb-ft (SAE) Fuel System Fuel Injection Type: Bosch L-Jetronic or Motronic fuel injection depending on specific model variant. Fuel Type: Unleaded Gasoline (Premium) Cooling System Coolant Type Specification: BMW Coolant Antifreeze (blue) or equivalent ethylene glycol-based coolant, typically a 50/50 mix with distilled water. Engine Code Example Engine Code Alternative: M30B33 (for 733i, though often referred to as 3.2L) 🔧 Transmission Standard Standard Transmission: 4-speed manual transmission (Getrag 260/5) Optional Optional Transmission: 3-speed or 4-speed ZF automatic transmission (e.g., ZF 4HP22) Features Transmission Fluid Spec Auto: Typically Dexron-III or equivalent ATF. Manual transmission fluid specification is GL-4 or GL-5 gear oil. 📐 Dimensions Exterior Wheelbase Mm: 2,865 mm (112.8 in) Length Mm: 4,910 mm (193.3 in) Width Mm: 1,798 mm (70.8 in) Height Mm: 1,418 mm (55.8 in) Weights Curb Weight Kg: Approx. 1,550 - 1,650 kg (3,417 - 3,638 lbs) depending on configuration Gross Vehicle Weight Rating Kg: Approx. 2,000 - 2,100 kg (4,409 - 4,630 lbs) 🛡️ Safety Features Ratings Crash Test Data: Limited formal crash test data readily available for this specific year/model in modern standards. E23 was engineered with significant safety considerations for its era. Active Features Active Safety Features: Four-wheel disc brakes, Anti-lock Braking System (ABS) was optional and becoming available in this generation. Passive Features Passive Safety Features: Reinforced safety cell, energy-absorbing steering column, laminated front windshield, side-impact beams. Seatbelt Type: Three-point seatbelts (front), lap belts (rear standard). 💡...