Target Audience:
Professional automotive technicians, independent repair shops, and advanced do-it-yourself enthusiasts with a foundational understanding of automotive mechanics and electrical systems.
Value Proposition:
Provides factory-level repair information in a readily accessible digital format, enabling efficient and accurate maintenance and repair for the Audi 80/90 B3, often surpassing the availability of physical manuals for this model year range.
Feature 1:
Step-by-step repair procedures with detailed instructions.
Feature 2:
Critical specifications, torque values, and tolerances.
Feature 3:
Illustrations, diagrams, and schematics to aid understanding.
Feature 4:
Comprehensive diagnostic information and troubleshooting guides.
Feature 5:
Maintenance schedules and fluid recommendations.
Model Years Covered:
1986, 1987, 1988, 1989, 1990, 1991
Vehicle Types Covered:
Sedan, Coupe (implied by '80/90' designation for this generation, though coupe might be specifically 80 Coupe)
Estimated Page Count:
Extensive (typical for factory-level repair manuals, likely 1000+ pages)
Manual Type:
Repair Service Manual / Workshop Manual
Engine:
Comprehensive overhaul and repair of all gasoline and diesel engines offered in the B3 chassis, including fuel injection systems (KE-Jetronic, Motronic), ignition systems, cooling systems, lubrication systems, exhaust systems, and emissions control.
Transmission:
Manual and automatic transmission repair, maintenance, clutch system service, driveshafts, CV joints, and differentials.
Brakes:
Front and rear brake systems (disc and drum configurations), ABS (if equipped), hydraulic lines, master cylinder, calipers, pads, rotors, and parking brake system.
Steering:
Power steering system diagnosis and repair, steering rack, tie rods, steering column, and alignment procedures.
Suspension:
Front and rear suspension components, shock absorbers, struts, control arms, ball joints, bushings, and wheel bearings.
Electrical System:
Complete wiring diagrams, fuse box layouts, battery and charging system, starter motor, alternator, lighting systems (headlights, taillights, interior), horn, wipers, power windows, central locking, and instrument cluster diagnostics.
Body And Chassis:
Body panel removal and installation, door mechanisms, interior trim, glass replacement, bumpers, corrosion protection, and chassis components.
Heating Ventilation Air Conditioning:
HVAC system diagnosis, blower motor, heater core, evaporator, refrigerant system, and climate control operation.
Fuel System:
Fuel tank, fuel pump, fuel lines, fuel filter, and fuel level sender unit diagnosis and replacement.
Cooling System:
Radiator, coolant hoses, thermostat, water pump, cooling fan, and heater core replacement and bleeding procedures.
Maintenance:
Routine maintenance tasks such as oil changes, filter replacements, spark plug service, brake fluid flushes, coolant changes, and belt inspections.
Troubleshooting:
Systematic diagnostic procedures for identifying and resolving common and complex mechanical and electrical issues, including symptom-based troubleshooting guides.
Repair:
Detailed step-by-step instructions for disassembling, repairing, cleaning, and reassembling all major vehicle components and systems.
Installation:
Guidance on installing new or replacement parts, accessories, and components.
Depth Of Coverage:
Comprehensive. Designed for professional technicians but accessible to skilled DIY mechanics. Covers everything from basic fluid changes to complete engine and transmission overhauls.
Common Engines:
1.6L, 1.8L, 2.0L, 2.3L (5-cylinder) gasoline engines; 1.6L, 1.9L diesel engines.
Engine Codes Examples:
e.g., JN (1.8L), KV (2.2L Coupe), NG (2.3L 5-cylinder), AAZ (1.9L TD)
Horsepower Range:
Approx. 70 hp to 130 hp depending on engine variant.
Torque Range:
Approx. 120 Nm to 200 Nm depending on engine variant.
Fuel Delivery Types:
Carbureted (early models), K-Jetronic (CIS) mechanical fuel injection, Motronic electronic fuel injection.
ECU Systems:
Motronic variants (e.g., M2.3, M2.5) for injected engines, diagnostic capabilities for these ECUs.
Block Material:
Cast Iron
Cylinder Head Material:
Aluminum Alloy
Timing Belt Replacement Interval:
Typically 60,000 - 100,000 km (refer to manual for specific engine)
Standard Transmission Types:
5-speed Manual Transmission
Optional Transmission Types:
3-speed or 4-speed Automatic Transmission (e.g., ZF 4HPxx series)
Clutch Type:
Dry single-plate clutch for manual transmissions.
Manual Transmission Fluid Type:
API GL-4, SAE 75W-90 or 80W-90 gear oil.
Automatic Transmission Fluid Type:
Audi G 052 162 A1 (equivalent to ATF Dexron II or III compatible fluid, check manual for exact spec).
Crash Test Data Availability:
Limited publicly available data from that era, but Audi generally emphasized chassis rigidity and safety features for its time.
ABS:
Optional on some models, standard on higher trims/later years.
Airbags:
Driver airbag became available/standard towards the end of the B3 production run.
Seat Belts:
All seating positions equipped with seat belts, front with pre-tensioners on some variants.
Body Construction:
Procon Ten safety system (early models), generally robust unibody construction.
Oil Change Interval:
Typically every 10,000-15,000 km or 12 months (refer to manual for specific engine and oil type).
Air Filter Replacement:
Every 20,000-30,000 km or as needed based on driving conditions.
Spark Plug Replacement:
Every 30,000-40,000 km for standard spark plugs, longer for platinum/iridium.
Engine Oil Capacity:
Varies by engine, typically 3.5L to 5.0L. Manual specifies grade (e.g., 10W-40, 5W-40).
Coolant Type:
G11 coolant (blue or green), ethylene glycol based. Requires specific Audi G 11 specification.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Power Steering Fluid:
Hydraulic fluid, usually Pentosin CHF 11S or compatible (check manual).
Common Issue 1:
K-Jetronic fuel system issues (clogged injectors, faulty warm-up regulator).
Common Issue 2:
Corrosion, especially in wheel arches, sills, and door bottoms.
Common Issue 3:
Electrical gremlins (faulty relays, switches, wiring loom issues).
Common Issue 4:
Worn suspension bushings and ball joints.
Common Issue 5:
Overheating due to clogged radiators or faulty thermostats/water pumps.
Brand Focus:
Audi, a German luxury automobile manufacturer known for its engineering, quattro all-wheel drive, and design innovation.
B3 Significance:
The B3 generation marked a significant design and engineering advancement for Audi, introducing more aerodynamic styling, improved safety, and a more refined chassis compared to its predecessors. It solidified Audi's reputation for quality and technology in the compact executive class.
Manufacturing Locations:
Primarily Ingolstadt, Germany.
Production Period B3:
1986-1991
