🏷️ Basic Information

Make:

BMW

Model:

7 Series

Model Code:

E23

Year:

1981

Generation Code:

E23

Generation Years:

1977-1986

Chassis Code:

E23

👋 Introduction

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.

Key Competitors:

Mercedes-Benz S-Class (W116/W126), Jaguar XJ, Audi V8 (later models), Cadillac Fleetwood

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

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.

Estimated Pages:

Not explicitly stated, but described as 'complete' and 'easy-to-use PDF-manual', implying comprehensive content.

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:

English

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 Type:

PDF

Printability:

All pages are printable, with the ability to enlarge images for clarity.

Binding:

Not Applicable (Digital Format)

Paper Type:

Not Applicable (Digital Format)

📖 Manual Coverage

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

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.

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

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

Horsepower Estimate 733I:

Approx. 197 hp (DIN) / 177 hp (SAE)

Torque Estimate 733I:

Approx. 210 lb-ft (DIN) / 190 lb-ft (SAE)

Fuel Injection Type:

Bosch L-Jetronic or Motronic fuel injection depending on specific model variant.

Fuel Type:

Unleaded Gasoline (Premium)

Coolant Type Specification:

BMW Coolant Antifreeze (blue) or equivalent ethylene glycol-based coolant, typically a 50/50 mix with distilled water.

Engine Code Alternative:

M30B33 (for 733i, though often referred to as 3.2L)

🔧 Transmission

Standard Transmission:

4-speed manual transmission (Getrag 260/5)

Optional Transmission:

3-speed or 4-speed ZF automatic transmission (e.g., ZF 4HP22)

Transmission Fluid Spec Auto:

Typically Dexron-III or equivalent ATF. Manual transmission fluid specification is GL-4 or GL-5 gear oil.

📐 Dimensions

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)

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

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 Safety Features:

Four-wheel disc brakes, Anti-lock Braking System (ABS) was optional and becoming available in this generation.

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).

💡 Technology Features

Infotainment Features 1981:

Basic AM/FM radio with cassette player, potentially power antenna. Analog gauges and controls.

Driver Assistance Features:

Cruise control, power steering, optional ABS.

Connectivity Features:

Limited to diagnostic ports for early electronic engine management systems. No modern connectivity features.

🔧 Maintenance

Oil Change Interval:

Typically every 10,000-15,000 km (6,000-9,000 miles) or annually, depending on driving conditions. Consult specific manual for exact intervals.

Major Service Interval:

Significant checks and replacements often recommended around 60,000-100,000 km (37,000-60,000 miles), including timing belt (if applicable), coolant, brake fluid, etc.

Engine Oil Spec:

API SG or SH rated synthetic or semi-synthetic oil, SAE 10W-40 or 15W-50 recommended for optimal performance in various temperatures. Consult manual for precise viscosity.

Coolant Capacity Liters:

Approximately 10-12 liters.

Brake Fluid Spec:

DOT 3 or DOT 4 brake fluid.

Common E23 Issues:

Cooling system leaks (hose deterioration, radiator), fuel distributor and injector issues (K-Jetronic), electrical connector corrosion, seal degradation (e.g., window seals, door seals), occasional ignition system component failure (e.g., ignition coil, distributor rotor).

Maintenance Priority:

Regular maintenance is crucial to prevent expensive repairs due to the complexity and luxury nature of the vehicle.

📚 Vehicle History

Brand Focus:

BMW, known for 'The Ultimate Driving Machine', emphasizing performance, engineering, and driver engagement.

E23 Introduction:

The E23 was BMW's first-generation 7 Series, introduced in 1977 as a successor to the BMW E12 5 Series and a competitor to established luxury sedans.

E23 Development:

Designed by Paul Bracq, the E23 featured a more modern, aerodynamic, and luxurious design compared to its predecessors, with a focus on driver comfort and advanced technology for its time.

Production Years E23:

1977-1986

Manufacturing Location:

Dingolfing, Germany

🏆 Awards & Recognition

Industry Acknowledgment:

While specific 'awards' for the 1981 model are rare, the E23 generation was widely recognized for setting new benchmarks in luxury, performance, and engineering within the automotive press and consumer reviews of its era.