🏷️ Basic Information

Make:

Audi

Model:

S4

Year:

1994

Product Type:

Service & Repair Manual Software

Chassis Code:

B4

👋 Introduction

Segment:

Performance Sedan

Positioning:

The 1994 Audi S4 (B4 chassis) represented a significant step in Audi's performance offerings, building on the success of the previous 'S' models. It was positioned as a capable, all-weather performance sedan with a focus on comfort and executive appeal, competing against vehicles like the BMW M3 (E36) and Mercedes-Benz 2.3-16 Cosworth.

Competitors:

BMW M3 (E36), Mercedes-Benz 190E 2.3-16/2.5-16, Subaru SVX (though different class).

Performance Focus:

Turbocharged engine, quattro AWD, sport-tuned suspension, potent braking system.

Practicality:

Four-door sedan body style offering practicality for daily use.

Dvantage Of Software:

Instant access, searchable, multi-device compatibility, cost-effective compared to outdated print manuals.

📋 Manual Details

Primary Coverage:

1994 Audi S4

Estimated Pages:

Extensive (Digital Format - Full Year Access)

Type:

Factory-Derived Online Service and Repair Manual

Language:

English

Format:

Online Software/Web-Based Access

📖 Manual Coverage

Engine:

Full engine diagnostics, repair, and overhaul for the 2.2L Turbocharged inline-5 engine.

Drivetrain:

Manual transmission, clutch assembly, quattro all-wheel-drive system (center differential, rear differential), driveshafts, axles.

Brakes:

Front and rear brake systems (discs, calipers, pads, lines), ABS system diagnostics and repair.

Suspension:

Front and rear suspension components (struts, shocks, control arms, bushings, ball joints), alignment specifications.

Steering:

Power steering system (pump, rack, lines), steering column, wheel alignment.

Electrical:

Complete wiring diagrams, fuse box layouts, starter system, charging system, ignition system, lighting, instrument cluster, comfort electronics.

Heating Ac:

Climate control system, A/C compressor, refrigerant system, heater core, blower motor.

Body:

Exterior body panels, doors, windows, sunroof, bumpers, interior trim, seat adjustments.

Fuel System:

Fuel pump, fuel injectors, fuel pressure regulator, fuel filter, fuel tank.

Cooling System:

Radiator, water pump, thermostat, coolant hoses, cooling fan.

Maintenance:

Oil and filter changes, spark plug replacement, air filter replacement, fuel filter replacement, coolant flushes, brake fluid changes.

Troubleshooting:

Diagnostic procedures for common faults, error code interpretation (where applicable), step-by-step troubleshooting guides.

Repair:

Detailed step-by-step repair instructions for all major components and systems.

Diagnostics:

Engine management system diagnostics, ABS system diagnostics, climate control diagnostics.

Depth:

Comprehensive, from basic scheduled maintenance to complete engine and transmission rebuilds.

Diagnostic Capability:

Advanced diagnostic procedures including testing of sensors, actuators, and control modules.

Rebuild Procedures:

Detailed instructions and specifications for engine, transmission, and differential rebuilds.

📊 Manual Specifications

Format Details:

Web-based access, compatible with PC, laptop, smartphone, tablet browsers. Requires internet connection.

Quality:

N/A (Digital content optimized for screen viewing)

Binding:

N/A (Digital content)

Paper:

N/A (Digital content)

⚙️ Engine Specifications

Engine Code:

ABY

Configuration:

2.2L (2226cc) DOHC Inline 5-cylinder, turbocharged, intercooled

Bore X Stroke:

81.0 mm x 86.4 mm

Compression Ratio:

9.0:1

Horsepower:

227 hp @ 5900 rpm

Torque:

243 lb-ft @ 3000 rpm

Induction:

Bosch Motronic electronic fuel injection with turbocharger and intercooler

Fuel Type:

Unleaded Premium (91+ Octane)

Cooling Capacity:

Approx. 7.5 liters (with heater core)

Coolant Type:

G12 (Purple) or G11 (Blue) ethylene glycol-based coolant

🔧 Transmission

Transmission Type:

6-speed Manual

Transmission Type:

N/A (Manual only for S4)

Drivetrain Layout:

Permanent All-Wheel Drive (quattro)

Transfer Case:

Torsen Center Differential (automatic torque biasing)

Manual Transmission Fluid:

API GL-4 or GL-5, SAE 75W-90 synthetic gear oil (Check manual for specific Audi specs)

Manual Transmission Capacity:

Approx. 2.1 liters

📐 Dimensions

Length:

4518 mm (177.9 in)

Width:

1739 mm (68.5 in)

Height:

1384 mm (54.5 in)

Wheelbase:

2610 mm (102.8 in)

Curb Weight:

Approx. 1580 kg (3483 lbs)

🛡️ Safety Features

Safety Standards:

Reflects early 1990s US Federal Motor Vehicle Safety Standards (FMVSS).

ABS:

Anti-lock Braking System (ABS) standard.

AWD:

quattro permanent all-wheel-drive system for enhanced traction and stability.

Airbags:

Driver's side airbag.

Seatbelts:

Three-point inertia-reel seatbelts with pre-tensioners.

Rollover Protection:

Reinforced body structure, A-pillar design.

💡 Technology Features

Audio System:

Factory AM/FM cassette stereo with optional CD changer. Sound quality typically reflects its era.

ABS:

Standard Anti-lock Braking System.

AWD:

quattro permanent all-wheel drive provides significant stability and traction.

Connectivity Features:

Basic, no integrated Bluetooth or modern connectivity features. Requires aftermarket solutions.

🔧 Maintenance

Oil Change:

Every 5,000-7,500 miles (or 6-12 months, whichever comes first) using synthetic oil.

Spark Plugs:

Check and replace at 30,000-60,000 mile intervals, depending on plug type and condition.

Timing Belt:

Crucial: Replace every 60,000 miles or 5 years due to interference engine design. This is a critical maintenance item often overlooked, and failure leads to catastrophic engine damage.

Coolant Flush:

Every 2-3 years or 30,000 miles.

Brake Fluid Change:

Every 2 years.

Engine Oil:

Fully Synthetic SAE 5W-40 or 5W-30 (refer to manual for exact API/VW specification, e.g., VW 502 00).

Power Steering Fluid:

G 002 000 or Pentosin CHF 11 S (Green fluid). DO NOT use generic ATF.

Brake Fluid:

DOT 4

Ignition System:

Coil pack failures, distributor issues, spark plug wire degradation. Requires proper diagnostic approach.

Turbocharger:

Oil leaks, wastegate actuator issues, potential for turbo wear if not properly maintained (especially oil changes).

Cooling System:

Plastic coolant expansion tank can become brittle and crack. Water pump seals can leak.

Suspension Bushings:

Front control arm bushings and rear axle bushings are common wear items, leading to vague steering and poor handling.

Window Regulators:

Manual or electric window regulators can fail, causing windows to drop.

Cv Joints:

Front CV joint boots are prone to splitting, leading to joint wear and failure.

Oil Pan:

The factory oil pan is susceptible to damage from low ground clearance and road debris.

ABS Sensor:

ABS wheel speed sensors can fail, illuminating the ABS warning light.

📚 Vehicle History

Audi History:

Audi, a German manufacturer with a history dating back to the early 20th century, is renowned for its engineering prowess, quattro all-wheel-drive technology, and sophisticated designs. The 'S' designation signifies Audi's high-performance models.

Audi 80 B4:

The 1994 Audi S4 is part of the Audi 80/90 lineage, specifically the B4 generation, which ran from 1991-1994. The 'S' models were introduced to offer enhanced performance variants of the standard sedans and coupes.

Production Years:

1992-1994 (for the S4 designation on the B4 chassis).

Manufacturing Location:

Germany

🏆 Awards & Recognition

Performance Reviews:

Often praised by automotive journalists of the era for its blend of performance, all-weather capability, and refined interior.

Safety Ratings Era:

Compliant with 1990s safety regulations, but not directly comparable to modern IIHS or NHTSA tests. Likely received good marks for its structural integrity and passive safety features at the time.