🏷️ Basic Information

Make:

Audi

Model:

80 Quattro

Year:

1991

Chassis Code:

B3

👋 Introduction

Positioning:

Essential diagnostic and repair resource for owners and independent repair facilities specializing in the 1991 Audi 80 Quattro.

Comparison To Print:

Superior to dated printed manuals due to instant accessibility, searchability, and up-to-date (within the licensed scope) information. Avoids issues of lost or damaged physical copies.

Value Proposition:

Cost-effective DIY solution for repairs, saving significant labor costs compared to professional workshops. Empowers owners with accurate factory-derived information.

Software Advantage:

Developed by RepairSurge, leveraging licensed OE (Original Equipment) materials for accuracy and completeness.

📋 Manual Details

Manual Type:

Service and Repair Manual Software

Format:

Online Software (Web Browser Access)

Language:

English

Licensing:

Officially Licensed, OE Material Derived

Access Duration:

1 Year (with discount for extensions)

📖 Manual Coverage

Engine Mechanical:

Full diagnostics, repair, overhaul, and component replacement (e.g., cylinder head, pistons, crankshaft, timing systems)

Engine Management:

Fuel injection systems (CIS-E/Motronic), ignition systems, emissions control systems, sensor diagnostics and replacement

Drivetrain:

Manual and automatic transmissions, clutch, driveshafts, CV joints, differential, Quattro all-wheel drive system operation and repair

Suspension:

Front and rear suspension components, shock absorbers, struts, springs, bushings, alignment specifications

Steering:

Power steering system, steering rack, tie rods, steering column, steering angle sensor (if applicable)

Brakes:

Hydraulic system, ABS (if equipped), brake pads, rotors, calipers, brake lines, parking brake

Electrical System:

Wiring diagrams for all circuits, starter, alternator, battery, lighting systems, horn, wipers, power windows, central locking

HVAC:

Heating, ventilation, and air conditioning (HVAC) system diagnosis, refrigerant handling, component replacement (compressor, evaporator, heater core)

Bodywork:

Body panel removal and installation, interior trim, glass replacement, door mechanisms

Troubleshooting:

Diagnostic flowcharts, symptom-based troubleshooting guides, common fault identification

Maintenance:

Regular scheduled maintenance, fluid changes, filter replacements, spark plug replacement, belt inspections/replacement

Repair:

Detailed step-by-step repair instructions for virtually all mechanical and electrical components

Diagnostics:

Advanced diagnostic procedures utilizing onboard diagnostic (OBD) systems (where applicable for the era) and manual testing methods

Component Replacement:

Complete guides for replacing all major and minor components

Specifications:

Torque specifications, clearances, tolerances, fluid capacities, and diagnostic values

Depth Level:

Comprehensive (from basic maintenance to complete engine and transmission rebuilds)

📊 Manual Specifications

File Format Type:

Proprietary Software Accessed via Web Browser

Accessibility:

PC, Laptop, Smartphone, Tablet Compatible

Internet Requirement:

Active Internet Connection Required

Print Ability:

Printable pages (depending on browser/platform capabilities)

Binding Type Analogy:

N/A (Digital Format)

Paper Type Analogy:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Code Typical:

JN (2.0L 8v SOHC)

Engine Displacement:

1984 cc (2.0 Liters)

Engine Configuration:

Inline 4-Cylinder

Valve Mechanism:

SOHC (Single Overhead Camshaft), 8 Valves

Horsepower Approx:

113 hp @ 5500 rpm (may vary slightly by market/emission standards)

Torque Approx:

170 Nm (125 lb-ft) @ 3000 rpm (may vary)

Fuel Delivery:

Bosch CIS-E (Continuous Injection System - Electronic) or potentially Motronic EFI depending on specific market/variant.

Fuel Type:

Unleaded Gasoline (87 AKI / 91 RON minimum recommended)

Bore X Stroke:

82.5 mm x 92.8 mm

Compression Ratio:

10.1:1

🔧 Transmission

Type:

5-Speed Manual Transmission

Type:

4-Speed Automatic Transmission (Tiptronic not available)

Quattro System:

Viscous coupling center differential (for permanent all-wheel drive) with open front and rear differentials.

Manual Transmission Fluid:

GL-4 Gear Oil (e.g., 75W-90)

Automatic Transmission Fluid:

G 052 162 A2 or equivalent Dexron III/Mercon

📐 Dimensions

Length:

approx. 4405 mm (173.4 in)

Width:

approx. 1690 mm (66.5 in)

Height:

approx. 1415 mm (55.7 in)

Curb Weight:

approx. 1350-1400 kg (2976-3086 lbs) depending on equipment

Gross Vehicle Weight Rating:

approx. 1850 kg (4079 lbs)

🛡️ Safety Features

Crash Test Era:

Information may be limited for this era; focus on inherent design safety features.

ABS:

Optional Anti-lock Braking System (ABS) available on some models.

Airbags:

Driver's side airbag generally not standard, may have been an option on later production runs or specific markets.

Seatbelts:

All seating positions equipped with three-point inertia-reel seatbelts (front and rear).

Body Construction:

Unitary construction with crumple zones and reinforced passenger safety cell.

💡 Technology Features

Audio System:

Factory-installed AM/FM cassette player with optional CD changer compatibility. Speaker systems typically 4-6 speakers.

Dashboard Controls:

Analog gauges for speedometer, tachometer, fuel, and temperature. Basic climate controls, often with manual ventilation and heating.

Cruise Control:

Optional cruise control system available on some models.

Lighting:

Halogen headlights, often with integrated fog lights on Quattro models. Manual headlight leveling.

🔧 Maintenance

Oil Change Interval:

Every 7,500 - 10,000 miles (12,000 - 15,000 km) or 12 months, whichever comes first. Consult manual for exact conditions.

Air Filter Replacement:

Every 15,000 - 20,000 miles (24,000 - 32,000 km) or as needed based on driving conditions.

Spark Plug Replacement:

Every 30,000 miles (48,000 km) for standard plugs; platinum/iridium may extend this. Check manual for specific plug type.

Timing Belt Replacement:

Crucial! Typically every 60,000 miles (96,000 km) or 4-5 years, as it is an interference engine. Failure results in catastrophic engine damage.

Engine Oil Capacity:

Approx. 4.5 Liters (4.8 Quarts) with filter, depending on engine variant. Use 5W-40 or 5W-30 synthetic oil.

Coolant Type:

G11 (blue) or G12 (pink/red) coolant concentrate mixed 50/50 with distilled water. Check manual for correct specification.

Brake Fluid Type:

DOT 4

Vacuum Lines:

Degradation and cracking of vacuum lines can lead to idle issues, poor performance, and HVAC control problems.

Fuel Pressure Regulator:

Failure of CIS-E fuel distributors and pressure regulators can cause starting issues and rough running.

Water Pump Leaks:

Water pump seals are a common wear item, leading to coolant leaks.

Electrical Connections:

Corrosion or looseness in electrical connectors, particularly ground points, can cause intermittent electrical faults.

Suspension Bushings:

Wear in control arm bushings and other suspension components can lead to clunking noises and poor handling.

📚 Vehicle History

Heritage Significance:

Audi's reputation for engineering prowess, Quattro technology, and sophisticated design.

Model Lineage:

The Audi 80/90 (Type 81/85, then B2, then B3) was Audi's compact executive car, bridging the gap between the smaller Audi 50/60 and the larger Audi 100/A6.

B3 Generation:

The B3 generation (introduced in 1986) was a significant redesign featuring aerodynamic styling, improved safety, and the introduction of the Procon-Ten safety system (a precursor to modern seatbelt pre-tensioners) on some models.

Production Period:

The B3 generation was produced from 1986 to 1991/1992.

Manufacturing Location:

Primary production was in Ingolstadt, Germany.

🏆 Awards & Recognition

General Recognition:

While specific awards for the 1991 model might not be readily documented, the Audi 80/90 series as a whole was recognized for its build quality, sophisticated design, and the revolutionary Quattro all-wheel-drive system.