🏷️ Basic Information Identification Make: Audi Model: 100 Year: 1984 Codes Chassis Code: Type 443 👋 Introduction Market Position Vehicle Segment: Executive mid-size sedan/wagon, positioned as a premium European offering. Competitive Analysis Key Competitors: BMW 5 Series, Mercedes-Benz W124 E-Class, Volvo 740/760, Saab 9000. Key Features Engineering Philosophy: Audi's Quattro all-wheel-drive system (optional), aerodynamic design, sophisticated suspension, and high-quality interior. Manual Advantage: Direct, no-frills digital access to factory-level repair information, crucial for maintaining these technically advanced vehicles of the era. 📋 Manual Details Coverage Areas Manual Type: Workshop Service and Repair Manual Language: English Format: PDF Page Count: Estimated 500-800 pages (typical for comprehensive workshop manuals of this era) 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed disassembly, assembly, inspection, and repair procedures for all engine variants. Engine Electrical: Ignition system, fuel injection system (Bosch CIS-Jetronic/KE-Jetronic), starting system, charging system, sensors, and ECU diagnostics. Transmission Manual: Repair and overhaul of 4-speed and 5-speed manual transmissions. Transmission Automatic: Repair and overhaul of ZF 3-speed and 4-speed automatic transmissions (e.g., 4HP22). Drivetrain And Axles: Front-wheel drive system, rear differential, driveshafts, CV joints, and wheel bearings. Suspension System: Front MacPherson struts, rear semi-independent trailing arm suspension, shock absorbers, springs, bushings, and alignment procedures. Steering System: Power steering system, steering rack, tie rods, and steering column. Braking System: Hydraulic system, brake fluid, master cylinder, brake boosters (vacuum), front disc brakes (solid/ventilated), rear drum/disc brakes, and parking brake. Fuel System: Fuel tank, fuel pump, fuel lines, fuel filter, and Bosch K-Jetronic/KE-Jetronic fuel injection components. Cooling System: Radiator, coolant hoses, thermostat, water pump, cooling fan, and heater core. Exhaust System: Exhaust manifold, catalytic converter (if applicable for market), mufflers, and exhaust pipe replacement. Climate Control: Heating and ventilation system (HVAC), air conditioning system (if equipped), controls, blower motor, and refrigerant handling. Electrical System Chassis: Lighting system (headlights, taillights, interior), horn, wipers, washer system, central locking, power windows, and instrument cluster. Body And Chassis: Corrosion protection and basic structural repair guidelines. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, fluid checks and top-offs, belt inspections. Troubleshooting: Diagnostic procedures for common drivability issues, electrical faults, and mechanical problems, including symptom-based troubleshooting charts. Component Overhaul: Detailed step-by-step instructions for rebuilding engines, transmissions, steering racks, and brake calipers. Alignment And Suspension: Wheel alignment specifications and procedures, suspension component replacement. Electrical Diagnostics: Wiring diagrams, component testing, and troubleshooting logic for the entire electrical system. Fuel Injection Tuning: Adjustment and recalibration procedures for K-Jetronic/KE-Jetronic systems, including idle speed, CO mixture (where adjustable), and idle stability. Body Repair Minor: Removal and installation of trim, panels, and glass; minor dent repair guidance. Technical Depth Diagnostic Capabilities: Comprehensive diagnostic trees and fault code interpretation (for ECUs present in '84 models). Repair Complexity: Suitable for professional mechanics and skilled DIY enthusiasts, covering everything from basic tune-ups to complete engine and transmission rebuilds. Torque Specifications: Extensive list of torque specifications for all critical fasteners. Tolerances And Clearances: Detailed specifications for engine component clearances, bearing tolerances, and other critical measurements. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content for quick information retrieval. Print Quality: High-resolution scans, suitable for printing individual pages or the entire document. Binding Type Binding: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Codes Gasoline: JN, KX, NP, RU (5-cylinder 2.2L); WC (4-cylinder 1.8L, less common in some markets). Engine Type Gasoline: Inline-5 cylinder, naturally aspirated and turbocharged (e.g., 2.2L Turbocharged). Displacement: 1781cc (1.8L), 2144cc (2.2L). Performance Horsepower 2.2L Na: Approximately 136 PS (134 hp) @ 5700 rpm. Horsepower 2.2L Turbo: Approximately 165 PS (163 hp) @ 5500 rpm. Torque 2.2L Na: Approximately 18.8 kg⋅m (185 Nm / 136 lb-ft) @ 3500 rpm. Torque 2.2L Turbo: Approximately 24.0 kg⋅m (235 Nm / 174 lb-ft) @ 3500 rpm. Fuel System Fuel Delivery: Bosch K-Jetronic or KE-Jetronic (CIS-E) continuous injection system. Fuel Type: Unleaded gasoline (Octane rating varies by market, typically 95 RON). 🔧 Transmission Standard Standard Transmission: 5-speed manual transmission (e.g., Getrag). Optional Optional Transmission: ZF 3-speed or 4-speed automatic transmission (e.g., 4HP22). Features Drivetrain Options: Front-wheel drive (FWD) standard, Quattro all-wheel drive (AWD) optional on many variants. Automatic Transmission Features: Lock-up torque converter for improved efficiency, sport/economy modes on some 4-speed units. 📐 Dimensions Exterior Wheelbase: Approximately 2610 mm (102.8 inches). Length: Approximately 4770 mm (187.8 inches). Width: Approximately 1770 mm (69.7 inches). Height: Approximately 1420 mm (55.9 inches). Weights Curb Weight: Ranging from approximately 1250 kg (2756 lbs) to 1450 kg (3197 lbs) depending on engine and equipment. 🛡️ Safety Features Ratings Crash Test Data: No comprehensive standardized crash test data readily available for this specific model year from organizations like NHTSA or Euro NCAP as conducted today. Relied on internal Audi engineering and market-specific regulations. Active Features Braking System: Power-assisted hydraulic brakes, front ventilated discs, rear drums or...
Bosch K-Jetronic or KE-Jetronic (CIS-E) continuous injection system.
Fuel Type:
Unleaded gasoline (Octane rating varies by market, typically 95 RON).
🔧 Transmission
Standard
Standard Transmission:
5-speed manual transmission (e.g., Getrag).
Optional
Optional Transmission:
ZF 3-speed or 4-speed automatic transmission (e.g., 4HP22).
Features
Drivetrain Options:
Front-wheel drive (FWD) standard, Quattro all-wheel drive (AWD) optional on many variants.
Automatic Transmission Features:
Lock-up torque converter for improved efficiency, sport/economy modes on some 4-speed units.
📐 Dimensions
Exterior
Wheelbase:
Approximately 2610 mm (102.8 inches).
Length:
Approximately 4770 mm (187.8 inches).
Width:
Approximately 1770 mm (69.7 inches).
Height:
Approximately 1420 mm (55.9 inches).
Weights
Curb Weight:
Ranging from approximately 1250 kg (2756 lbs) to 1450 kg (3197 lbs) depending on engine and equipment.
🛡️ Safety Features
Ratings
Crash Test Data:
No comprehensive standardized crash test data readily available for this specific model year from organizations like NHTSA or Euro NCAP as conducted today. Relied on internal Audi engineering and market-specific regulations.
Active Features
Braking System:
Power-assisted hydraulic brakes, front ventilated discs, rear drums or discs depending on model/market. Anti-lock Braking System (ABS) became available later in the generation or on specific higher trims/markets.
Passive Features
Restraints:
Three-point seat belts (front), two-point lap belts (rear), optional front seat belts with pre-tensioners (late models/markets). No airbags standard on early '84 models.
Body Structure:
Reinforced safety cage, crumple zones front and rear, side impact beams in doors.
💡 Technology Features
Infotainment
Audio System:
Factory-installed AM/FM radio with cassette player. Speakers typically located in doors and rear parcel shelf. Upgradeable to modern aftermarket units.
Driver Assistance
ABS:
Anti-lock Braking System (ABS) was optional on higher trims or later production models, often a 3-channel system.
Connectivity
Original Connectivity:
Limited to basic automotive electrical systems. No form of digital connectivity or integrated mobile phone systems.
🔧 Maintenance
Service Intervals
Engine Oil Change:
Typically every 7,500 - 15,000 km (4,500 - 9,000 miles) or 6-12 months, depending on driving conditions and oil specification used.
Air Filter Replacement:
Every 15,000 - 30,000 km (9,000 - 18,000 miles).
Spark Plug Replacement:
Every 20,000 - 40,000 km (12,000 - 24,000 miles), depending on plug type.
Timing Belt Replacement:
Critical for 5-cylinder engines. Typically every 60,000 - 90,000 km (37,000 - 56,000 miles) or 4-5 years. Failure leads to catastrophic engine damage.
Fluid Specifications
Engine Oil Type:
API SG or higher, SAE 10W-40 or 15W-50 often recommended. Check manual for specific viscosity based on ambient temperature.
Coolant Type:
Ethylene glycol-based antifreeze mixed with distilled water (50/50 ratio). Specific OAT or HOAT coolant not typically required for this era.
Brake Fluid Type:
DOT 3 or DOT 4 (check cap/reservoir for specification).
Transmission Fluid Manual:
GL-4 gear oil, SAE 75W-90 or 80W-90.
Transmission Fluid Automatic:
Dexron II or equivalent ATF (Automatic Transmission Fluid).
Known Issues
Electrical Gremlins:
Common issues include corroded ground points, failing relays, intermittent dashboard warnings, and faulty door lock actuators due to age and wiring degradation.
Fuel System K Jetronic:
Air flow sensor plate issues, failing warm-up regulator (WUR), clogged injectors, and vacuum leaks can cause rough idle, stalling, and poor performance.
Suspension Wear:
Worn control arm bushings, ball joints, and tie rod ends are common due to mileage and age, leading to vague steering and alignment issues.
Cooling System Leaks:
Degradation of rubber hoses, radiator core leaks, and water pump seal failure are prevalent.
Rust And Corrosion:
Areas like wheel arches, sills, and the underbody can be susceptible to rust, especially in regions with harsh winters and road salt.
📚 Vehicle History
Brand Heritage
Audi Brand History:
Audi, a German automotive manufacturer with roots dating back to the early 20th century, is known for its engineering prowess and innovative designs, particularly its pioneering of front-wheel drive and Quattro all-wheel drive systems.
Model Evolution
Audi 100 Generation:
This manual covers the 'Type 44' or 'C3' generation of the Audi 100, produced from 1982 to 1991. It represented a significant leap in aerodynamics and design for Audi.
Production
Production Location:
Primarily produced in Ingolstadt, Germany, and Neckarsulm, Germany. Also assembled in other locations worldwide.
🏆 Awards & Recognition
Recognitions
Aerodynamic Design Award:
The C3 Audi 100 was lauded for its exceptionally low drag coefficient (Cd of around 0.30 for sedan), setting a benchmark for its time and winning design awards for its advanced aerodynamic styling.
Quattro System Impact:
The introduction of the Quattro system significantly boosted Audi's reputation for performance and handling, particularly in motorsport and adverse weather conditions, influencing subsequent models.