🏷️ Basic Information

Make:

Audi

Model:

A4

Model Variants:

S4, RS4 Avant, Allroad

Chassis Codes:

8D, 8D2, 8D5

Model Year:

1998

👋 Introduction

Segment:

Premium compact executive car

Competitors 1998:

BMW 3 Series (E46), Mercedes-Benz C-Class (W202), Lexus IS

Platform Basis:

Volkswagen Group B5 platform (shared with Volkswagen Passat B5)

Powertrain Options:

Quattro all-wheel drive available on many models, renowned for stability and traction

Design Philosophy:

Understated elegance, build quality, and driver-focused interior

📋 Manual Details

Primary Coverage:

Full factory service and repair

Model Scope:

All Audi A4 models (1998) including S4, RS4 Avant, and Allroad variants

Total Pages:

14487

Type:

Factory Service Manual

Language:

English

File Format:

PDF

📖 Manual Coverage

Powertrain:

Mechanical Engine, Transmission (Manual & Automatic), Driveline Axle

Chassis:

Brakes, Steering, Suspension, Tires & Wheels

Electrical:

Complete Electrical System, Lights, Restraints (Airbags), Wiring Diagrams

Body And Interior:

Body & Frame - Interior & Exterior, Accessories & Equipment

Comfort And Climate:

HVAC (Heating, Ventilation, and Air Conditioning)

Infotainment:

Audio, Visual & Telematics

Maintenance:

Scheduled maintenance, fluid changes, filter replacements, lubrication

Diagnostics:

Troubleshooting guides, fault code interpretation, diagnostic procedures

Repair:

Component removal, installation, adjustment, and overhaul

Overhaul:

Detailed engine, transmission, and differential rebuild procedures

Electrical Repair:

Component testing, wiring harness repair, connector servicing

Depth:

Comprehensive, from basic fluid checks to complete engine and transmission rebuilds

Detail Level:

Factory-level diagnostic procedures, torque specifications, and repair sequences

📊 Manual Specifications

Quality:

High-resolution, suitable for printing

Searchability:

Fully searchable text

Printability:

Printable in entirety or by specific pages

Operating Systems:

Windows and Mac compatible

Software:

Adobe PDF Reader, WinRar

Method:

Instant Download

⚙️ Engine Specifications

A4 1.8T:

1.8L turbocharged inline-4 (APU, ARK, AUH, AVC, AWV, AWM engines)

A4 2.8 V6:

2.8L naturally aspirated V6 (AFC, AHA, ATX, AMX engines)

S4 2.7 Bi-Turbo:

2.7L twin-turbocharged V6 (APB, AGB engines)

Rs4 Avant Bi-Turbo:

2.7L twin-turbocharged V6 (ASJ, AZR engines)

1.8T:

150-180 hp (depending on variant and tune)

2.8 V6:

190-204 hp (depending on variant)

S4 2.7 Bi-Turbo:

250-265 hp

Rs4 Avant 2.7 Bi-Turbo:

375-380 hp

Injection Type:

Multi-point fuel injection (MPI) or direct injection (FSI in later models, but primarily MPI for 1998)

Fuel Type:

Premium Unleaded Gasoline (91 RON or higher recommended)

🔧 Transmission

A4 1.8T:

5-speed Manual

A4 2.8 V6:

5-speed Manual or 5-speed Tiptronic Automatic

S4/Rs4:

6-speed Manual

A4 1.8T:

5-speed Tiptronic Automatic

AWD Availability:

Quattro permanent all-wheel drive system available on most variants

📐 Dimensions

Length Sedan:

~4.52 m (~178 in)

Length Avant:

~4.58 m (~180 in)

Curb Weight Range:

~1450 - 1700 kg (~3197 - 3748 lbs) depending on model and equipment

🛡️ Safety Features

IIHS Front Impact:

Good (for models tested)

NHTSA Side Impact:

4-star (for models tested)

ABS:

Standard Anti-lock Braking System

Esc:

Electronic Stability Control (ESP) available on some models

Airbags:

Frontal airbags, side airbags available

Seatbelts:

3-point inertia reel seatbelts with pre-tensioners

💡 Technology Features

Audio Systems:

Factory Audi Symphony and Concert sound systems, optional Bose audio

Navigation:

Optional Audi Navigation Plus system (CD-ROM based)

Cruise Control:

Standard cruise control on most models

Phone Integration:

Optional integrated mobile phone preparation

🔧 Maintenance

Oil Change Interval:

Typically 7,500 to 10,000 miles (12,000 to 16,000 km) or 12 months, whichever comes first, depending on driving conditions and oil quality used (consult manual for specific recommendations)

Timing Belt Replacement V6:

Recommended every 60,000 - 80,000 miles or 5-7 years for V6 engines. Consult manual for exact interval and engine code.

Timing Belt Replacement Turbo:

The 1.8T engine uses a timing belt; interval typically 60,000 - 80,000 miles or 5-7 years. The V6 engines also have timing belts.

Engine Oil 1.8T:

SAE 5W-40 or 5W-30 synthetic oil meeting VW 502 00 / 505 00 specifications

Engine Oil 2.8V6:

SAE 5W-40 or 5W-30 synthetic oil meeting VW 502 00 / 505 00 specifications

Coolant:

G12 or G12+ ethylene glycol coolant (pink) mixed 50/50 with distilled water

Brake Fluid:

DOT 4 synthetic brake fluid

Transmission Fluid Manual:

API GL-4 or GL-5 gear oil, SAE 75W-90 (check manual for specific Audi specifications)

Transmission Fluid Automatic:

Audi G 052 162 A2 (or equivalent ATF meeting VW TL 521 62 specification)

Coil Packs:

Ignition coil pack failure can cause misfires and rough running (common on 1.8T)

Cv Boots:

Torn Constant Velocity (CV) boots leading to noise and damage

Window Regulators:

Failure of the power window regulator mechanisms

Oil Leaks:

Valve cover gasket and oil pan gasket leaks can occur with age

ABS Sensor:

ABS wheel speed sensor failures can illuminate ABS and Traction Control warning lights

📚 Vehicle History

Audi Legacy:

Long history of engineering excellence, particularly in quattro all-wheel drive technology and luxury interiors

A4 B5 Generation:

The 1998 model represents a refresh of the B5 generation, introduced in 1994 for Europe and 1995 for North America. It featured updated styling and improved technology.

Manufacturing Locations:

Germany (Ingolstadt, Neckarsulm), Belgium (Brussels), Slovakia (Bratislava)

🏆 Awards & Recognition

Car And Driver Awards:

A4 models frequently appeared on Car and Driver's 10Best lists in earlier generations, setting a benchmark for the class.

Overall Reputation:

Praised for its sophisticated chassis, quattro system, and premium interior for its era.