This comprehensive service and repair manual provides detailed instructions and illustrations for maintaining, servicing, diagnosing, and repairing your 1993 Audi 80 or 90 [8A, 8A2]. It covers all models and all aspects of repair, ensuring you have the information you need to handle any job, from routine maintenance to complex repairs.

The manual is structured for easy navigation, allowing you to quickly find the information you need. It includes step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications to guide you through every repair.

The manual covers a wide range of topics, including:

* **Maintenance:** Learn about routine maintenance tasks like oil changes, fluid checks, filter replacements, and tire rotations, ensuring your vehicle runs smoothly.
* **Engine:** Diagnose and repair engine problems, from basic troubleshooting to complex rebuilds, ensuring optimal engine performance.
* **Control System:** Understand and troubleshoot the vehicle's computer systems, including the engine control unit (ECU) and other electronic components.
* **Mechanical:** Deep dive into the mechanical aspects of the vehicle, including the transmission, drivetrain, suspension, steering, and brakes, enabling you to handle a wide range of repairs.
* **Fuel Service Specifications:** Get detailed information on fuel systems and components, ensuring proper fuel delivery and efficiency.
* **Emission Control:** Understand the vehicle's emissions control system and troubleshoot any problems, keeping your vehicle compliant with environmental regulations.
* **Intake Exhaust Cooling:** Learn about the intricacies of the intake, exhaust, and cooling systems, ensuring optimal engine temperature and performance.
* **Lube:** Get guidance on proper lubrication for all components, ensuring smooth operation and extended lifespan.
* **Ignition Starting Charging:** Diagnose and repair problems related to the ignition, starting, and charging systems, ensuring reliable engine operation.
* **Auto Transmission Clutch:** Learn about the workings of the automatic transmission, including the clutch, and troubleshoot any issues for smooth gear changes.
* **Manual Transmission:** Understand the manual transmission system, diagnose issues, and perform repairs for reliable gear selection and transmission performance.
* **Transfer Propeller Shaft:** Gain knowledge of the transfer and propeller shafts, essential for driving power to the wheels, and troubleshoot issues for smooth operation.
* **Drive Shaft:** Understand the drive shafts and their role in transmitting power to the wheels, allowing you to diagnose and repair problems for proper power delivery.
* **Differential:** Learn about the differential, its function, and how to diagnose and repair problems for smooth and controlled power distribution to the wheels.
* **Axle Suspension:** Explore the workings of the axles and suspension system, enabling you to diagnose and repair problems, ensuring a comfortable and safe ride.
* **Tire & Wheel:** Get information on tire and wheel maintenance, including proper tire pressure, wheel alignment, and wheel replacement, for optimal performance and safety.
* **Brake Control:** Explore the brake control system, including the hydraulic system and brake booster, allowing you to address issues for reliable braking performance.
* **Brake:** Learn the intricacies of the brake system, including the calipers, rotors, and pads, enabling you to diagnose and repair problems for safe braking.
* **Parking Brake:** Understand the parking brake system, including its components and operation, and troubleshoot any issues to ensure safe vehicle parking.
* **Steering Column:** Explore the steering column, including the steering wheel and steering shaft, allowing you to diagnose and repair problems for reliable steering control.
* **Power Steering:** Learn about the power steering system, including the power steering pump and hydraulic system, allowing you to diagnose and repair problems for smooth steering.
* **Air Condition:** Get comprehensive information on the air conditioning system, including the refrigerant system, compressor, and controls, enabling you to diagnose and repair problems for a cool and comfortable ride.
* **Suppl Restraint System:** Understand the supplementary restraint system, including airbags and seatbelt pre-tensioners, ensuring passenger safety in case of an accident.
* **Seat Belt:** Learn about the seatbelt system, including its components and operation, and troubleshoot any issues for reliable and safe passenger restraint.
* **Engine Immobilizer:** Understand the engine immobilizer system and troubleshoot any issues, ensuring vehicle security and preventing unauthorized starts.
* **Cruise Control:** Explore the cruise control system, including its components and operation, and troubleshoot any problems for convenient and safe driving.
* **Wiper & Washer:** Learn about the wiper and washer system, including the motor, blades, and washer pump, and troubleshoot any problems for clear visibility.
* **Door Lock:** Explore the door lock system, including the locking mechanism and actuators, and troubleshoot any problems for secure vehicle access.
* **Meter Audio/Visual:** Understand the instrument cluster and its various components, including the gauges, warning lights, and display, allowing you to troubleshoot any issues for proper vehicle information.
* **Horn:** Learn about the horn system and troubleshoot any problems, ensuring safe communication and warning.
* **Windshield/Glass Mirror:** Understand the windshield and mirrors, including their components and mounting system, allowing you to diagnose and repair any issues for clear visibility.
* **Instrument Panel:** Explore the instrument panel, including its components, and troubleshoot any problems for optimal functionality.
* **Seat:** Learn about the seat system, including its components, adjustment mechanism, and heating system, allowing you to diagnose and repair any issues for comfortable seating.
* **Engine Hood/Door:** Understand the engine hood and door systems, including their hinges, latches, and release mechanisms, allowing you to diagnose and repair any problems for proper operation.
* **Exterior & Interior:** Explore the vehicle's exterior and interior components, including the body panels, lights, upholstery, and other features, allowing you to diagnose and repair any issues for a well-maintained appearance.
* **Electrical:** Gain knowledge of the vehicle's electrical system, including wiring diagrams, fuses, and electrical components, allowing you to diagnose and repair electrical problems.
* **Multiplex/Can Communication:** Understand the vehicle's multiplex and CAN communication systems, enabling you to diagnose and repair complex electronic issues.

This comprehensive manual empowers you to take control of your vehicle's maintenance and repair, saving you money and giving you a deeper understanding of your Audi.

The 1993 Audi 80 and 90, codenamed 8A and 8A2, were the fourth generation of the Audi 80 model line, marking a significant departure from previous iterations. While the 80 was known for its practicality and affordability, the 1993 model embraced a more premium and sporting character. This was embodied in the 90, a sportier variant with aggressive styling and powerful engines. Both vehicles were offered with a range of petrol and diesel engines, including Audi's signature 5-cylinder powerplants, all paired with either a 5-speed manual or 4-speed automatic transmission. This generation also introduced innovative features like four-wheel drive (quattro), anti-lock brakes (ABS), and air conditioning, positioning them as technologically advanced vehicles for their time.

The 1993 Audi 80 and 90 were renowned for their driving dynamics, offering a balance of comfort and performance. The 80's comfortable ride and practical interior made it an attractive sedan for everyday use, while the 90, with its stiffened suspension and more powerful engine options, catered to enthusiasts seeking a more spirited driving experience. The introduction of the quattro system further enhanced the vehicles' performance, especially in challenging conditions. With its timeless design, elegant interior, and advanced technology, the 1993 Audi 80 and 90 cemented their position as reliable and desirable automobiles, solidifying Audi's reputation for creating high-quality vehicles with a distinct sense of style and performance.