🏷️ Basic Information

Make:

Audi

Model:

S4

Year:

1993

Vehicle Platform:

B4 (Typ 8A/8C)

Chassis Code:

Typ 8A (Sedan/Avant), Typ 8C (Coupe)

👋 Introduction

Market Position:

The 1993 Audi S4 (B4 platform) represented a high-performance, luxury compact executive sedan and wagon, positioned as a potent driver's car with advanced technology for its era. It competed with performance variants of models like the BMW M3 (E36), Mercedes-Benz 190E 2.3-16/2.5-16 Evolution, and Ford Sierra Cosworth.

Competitive Analysis:

The S4 offered a blend of Quattro all-wheel drive, turbocharged power, and Audi's signature build quality. Its performance focus, particularly the turbocharged inline-5 engine, set it apart in a segment often dominated by naturally aspirated engines. The availability of the Avant (wagon) body style also provided a unique niche for performance-oriented families.

Key Features:

2.2L turbocharged inline-5 engine, Quattro all-wheel drive, 5-speed manual transmission (standard), Sport-tuned suspension, performance-oriented interior and exterior styling, advanced (for the time) electronic engine management.

📋 Manual Details

Coverage Areas:

Complete Wiring Diagram

Page Count:

Unknown (Product description implies comprehensive, typically 50-200 pages for wiring diagrams)

Manual Type:

Wiring Diagram Manual / Electrical Troubleshooting Manual (ETM)

Language:

English

Format:

PDF

📖 Manual Coverage

Systems Covered:

Engine Management (ECU), Ignition System, Fuel Injection System, Lighting (Headlights, Taillights, Interior), Instrumentation Cluster, HVAC Controls, Power Windows, Power Locks, Power Mirrors, Sunroof, Audio System, ABS (if equipped), Airbag System (if equipped), Wiper/Washer System, Horn, Central Locking, Alarm System (if equipped), Cruise Control

Procedures Included:

Component identification, Pinouts, Wire colors, Fuse/Relay locations and assignments, Circuit tracing, Diagnostic troubleshooting of electrical faults, Repair of wiring harnesses, Component testing

Technical Depth:

Advanced Diagnostic and Repair Level. Detailed schematics for tracing electrical circuits and diagnosing faults. Focus on understanding component interconnections and signal paths.

📊 Manual Specifications

File Format:

PDF

Print Quality:

High Resolution (suitable for clear printing of diagrams and text)

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download - Printable)

Compatibility:

All Versions of Windows & Mac

Requirements:

Adobe PDF Reader

Downloadability:

YES (Instant Download)

⚙️ Engine Specifications

Primary Engine:

2.2L (2226cc) inline-5 turbocharged DOHC

Engine Code:

3B (preliminary, actual may vary slightly by market and VIN)

Horsepower:

227 hp @ 5900 rpm (approx.)

Torque:

243 lb-ft @ 1950 rpm (approx.)

Fuel System:

Bosch Motronic Electronic Fuel Injection (EFI) with Turbocharging

Turbocharger:

Garrett T3/T04 Hybrid or similar, Intercooled

Ignition System:

Electronic Ignition with Knock Control

Bore X Stroke:

80.5 mm x 95.7 mm (approx.)

Compression Ratio:

9.0:1 (approx.)

🔧 Transmission

Standard Transmission:

5-speed Manual Transmission

Optional Transmission:

4-speed Automatic Transmission

Drivetrain:

Quattro All-Wheel Drive (Permanent)

Differential Type:

Torsen Center Differential, Locking Rear Differential (often standard on S4)

📐 Dimensions

Length:

Sedan: ~4700 mm, Avant: ~4750 mm (approx.)

Width:

~1710 mm (approx.)

Height:

~1390 mm (Sedan), ~1440 mm (Avant) (approx.)

Curb Weight:

Sedan: ~1540 kg, Avant: ~1580 kg (approx.)

Wheelbase:

~2610 mm (approx.)

🛡️ Safety Features

Safety Ratings:

N/A (Specific NHTSA/Euro NCAP ratings for this exact model year/variant are not readily available, but European safety standards of the era were high for luxury vehicles).

Active Features:

Anti-lock Braking System (ABS), Quattro All-Wheel Drive

Passive Features:

Front Crumple Zones, Side Impact Beams, Driver and Passenger Airbags (standard on some markets/late production), Three-point Seatbelts with Pretensioners

💡 Technology Features

Infotainment System:

Factory Audi Chorus or Concert cassette radio with AM/FM tuner. Optional CD changer.

Driver Assistance Features:

Cruise Control, ABS (Anti-lock Braking System).

Connectivity Options:

N/A (No modern connectivity features like Bluetooth or USB; basic antenna input for radio).

Climate Control System:

Manual or automatic climate control systems were available, featuring A/C and heating.

🔧 Maintenance

Oil Change Interval:

Every 7,500 miles or 12 months (synthetic oil recommended), check manual for specific recommendations.

Timing Belt Replacement:

Every 60,000 miles or 5 years (critical due to interference engine design).

Spark Plug Replacement:

Every 30,000 miles (recommendations may vary).

Engine Oil Type:

API SG/SH or ACEA A2-96/A3-98, SAE 5W-40 or 10W-40 (consult manual for specific viscosity based on temperature).

Engine Oil Capacity:

5.5 Liters (approx. 5.8 US Quarts) with filter change.

Coolant Type:

G12 Plus (or equivalent ethylene glycol based coolant with G11 specification) - Pink or Red color.

Transmission Fluid Type:

Manual: GL-4 SAE 75W-90. Automatic: ATF Dexron II/III or equivalent.

Brake Fluid Type:

DOT 3 or DOT 4

Known Issues:

Distributor O-ring leaks, coolant flange leaks (common on Audi 5-cylinders), turbocharger wear/failure, intercooler hose degradation, fuel pump failure, window regulator issues, ABS sensor failures, ignition coil failures.

Timing Belt Kit Part Number Example:

e.g., Gates K015415XS (Verify specific PN for exact application)

📚 Vehicle History

Brand Heritage:

Audi, a German manufacturer founded in 1910, has a long history of innovation and luxury automotive engineering. The Quattro all-wheel-drive system, introduced in 1980, revolutionized rallying and became a hallmark of Audi's performance vehicles.

Model Evolution:

The Audi S4 nameplate first appeared on the B4 platform in 1991, evolving from the Audi 200. It was positioned as the performance flagship of the Audi 80/90 range (which became the A4). The 1993 model year represents a refinement of this performance variant.

Production Years:

1991-1994 (for the B4 S4 generation)

Manufacturing Locations:

Ingolstadt, Germany

🏆 Awards & Recognition

Recognitions:

While specific awards for the 1993 S4 variant are not widely publicized, the Audi 80/90/S4/A4 lineage consistently received accolades for its engineering, Quattro system, and driving dynamics throughout the 1990s. The S4 was recognized by automotive press for its potent performance in the compact executive segment.