🏷️ Basic Information

Make:

Audi

Model:

A4 (B5 Platform)

Generations Covered:

First Generation (B5)

Product Type:

Workshop Service Repair Manual

Platform Code:

B5

👋 Introduction

Segment:

Premium Compact Executive Sedan/Wagon

Target Audience:

Discerning buyers seeking a blend of performance, luxury, and sophisticated European engineering.

Key Competitors:

BMW 3 Series (E46), Mercedes-Benz C-Class (W202/W203), Lexus IS, Volvo S40/V40.

Design Philosophy:

Understated elegance, clean lines, driver-centric interior, and a focus on sophisticated driving dynamics.

Powertrain Options:

Inline-4 and V6 gasoline engines, and TDI diesel engines, often paired with Quattro all-wheel drive.

📋 Manual Details

Model Years:

1997, 1998, 1999, 2000, 2001

Estimated Pages:

Hundreds (as stated in description, actual count varies by specific sub-models and engines covered)

Manual Type:

Factory Service Manual / Workshop Manual

Language:

English

Format:

Downloadable (likely PDF)

📖 Manual Coverage

Powertrain:

Engine mechanical, engine management, fuel system, cooling system, exhaust system, transmission (manual and automatic), driveline, clutch.

Chassis:

Suspension (front and rear), steering system, brakes (hydraulic, ABS, parking brake), wheels and tires.

Electrical:

Battery, charging system, ignition system, lighting, instruments and gauges, body electrical systems (wiper/washer, power windows, locks, mirrors), climate control electronics, audio system.

Body:

Body exterior (panels, doors, hood, trunk, glass), interior trim, body hardware, structural components.

Routine Maintenance:

Oil and filter changes, fluid level checks and top-offs, spark plug replacement, air filter replacement, belt inspection and replacement.

Component Repair:

Engine overhaul, cylinder head repair, transmission overhaul, brake caliper and rotor replacement, suspension component replacement (shocks, struts, control arms), steering rack repair/replacement.

Diagnostics And Troubleshooting:

Diagnostic trouble codes (DTCs), electrical system diagnostics, fuel system diagnostics, mechanical system troubleshooting.

Special Tools And Equipment:

Identification and usage of specialized tools required for specific repair procedures.

Depth Level:

Comprehensive: Covers detailed disassembly, assembly, inspection, adjustment, and repair procedures for all major vehicle systems.

Diagnostic Capabilities:

Includes wiring diagrams, diagnostic flowcharts, sensor specifications, and expected values for troubleshooting.

Rebuild Procedures:

Detailed instructions for engine and transmission rebuilds, including torque specifications, clearances, and component tolerances.

Diagnostic Trouble Codes:

Provides a comprehensive listing of OBD-II DTCs relevant to the B5 platform, along with their definitions and potential causes.

Torque Specifications:

Detailed torque values for critical fasteners across all major components (engine, transmission, suspension, brakes, body).

Specifications And Tolerances:

Precise measurements for component clearances, wear limits, and assembly specifications essential for professional repairs.

Engine Mechanical Repair:

Detailed procedures for engine removal/installation, cylinder head gasket replacement, piston ring inspection/replacement, crankshaft and connecting rod bearing service, valve adjustment/replacement.

Transmission Repair:

Complete rebuild instructions for manual gearboxes (e.g., clutch replacement, synchro ring service) and automatic transmissions (e.g., torque converter seal replacement, valve body diagnostics, clutch pack replacement).

Brake System Repair:

Detailed procedures for brake pad and rotor replacement, caliper overhaul, brake line replacement, ABS modulator diagnostics and repair.

Suspension And Steering:

Front and rear suspension component replacement (control arms, ball joints, tie rods, sway bar links), steering rack removal and installation, power steering pump and hose service.

Electrical Diagnostics:

Comprehensive wiring diagrams for all electrical circuits, component testing procedures, fuse and relay identification, troubleshooting for lighting, power windows, central locking, and HVAC systems.

Climate Control System:

Diagnosis and repair of HVAC systems, including refrigerant handling, compressor replacement, evaporator and heater core service, blend door actuator troubleshooting.

Body And Interior:

Procedures for door panel removal, seat adjustment/replacement, headliner repair, body panel alignment, glass replacement (windshield, side glass).

Tire And Wheel:

Specifications for wheel bolt patterns (e.g., 5x112), recommended tire sizes, and alignment procedures.

Exhaust System Repair:

Catalytic converter replacement, muffler and pipe service, exhaust hanger inspection and replacement.

Fuel System Service:

Fuel pump replacement, fuel filter replacement, fuel injector cleaning/replacement, fuel pressure testing.

Cooling System Maintenance:

Radiator replacement, water pump service, thermostat replacement, heater core flush and replacement, fan clutch inspection.

📊 Manual Specifications

File Format:

PDF (Portable Document Format) - Assumed for download

Print Quality:

High-resolution, suitable for printing individual pages or the entire manual.

Binding Type:

N/A (Downloadable format)

Paper Type:

N/A (Downloadable format)

⚙️ Engine Specifications

Engine Variants Covered:

1.8L Turbo (AGU, APU, AWM), 2.4L V6 (AHA, ATQ), 2.8L V6 (ACK, ALG, AMX, APD, AQD, ATX), 1.9L TDI (AHH, AHU, ALH).

1.8T (Agu/Apu/Awm):

150-170 hp; 160-190 lb-ft torque

2.4L V6 (Aha/Atq):

165-170 hp; 170-177 lb-ft torque

2.8L V6 (Ack/Alg/Etc.):

190-200 hp; 205-207 lb-ft torque

1.9L Tdi (Ahh/Ahu/Alh):

90-110 hp; 149-177 lb-ft torque

Fuel Delivery:

Multi-point Fuel Injection (MPI) for gasoline, Direct Injection (DI) for TDI.

Ignition System:

Distributorless Ignition System (DIS) with coil-on-plug or coil-near-plug.

🔧 Transmission

Standard Transmission Options:

5-speed Manual Transmission (012 series).

Optional Transmission Options:

5-speed Tiptronic Automatic Transmission (01N series) or Continuously Variable Transmission (Multitronic - 01J series on some later models).

Drivetrain Options:

Front-Wheel Drive (FWD) or Audi's legendary Quattro All-Wheel Drive (AWD).

📐 Dimensions

Body Styles:

4-door Sedan, 5-door Avant (Wagon).

Wheelbase:

Approx. 102.9 inches (2614 mm)

Length:

Approx. 178.0 - 179.0 inches (4520 - 4547 mm) depending on body style.

Curb Weight:

Approx. 3100 - 3500 lbs (1400 - 1600 kg) depending on engine and drivetrain.

🛡️ Safety Features

NHTSA Ratings:

Good in frontal offset crash tests (IIHS), acceptable to good in NHTSA frontal impacts (early models had less stringent testing standards than today).

Active Safety:

Anti-lock Braking System (ABS), available Electronic Stability Program (ESP) on later models, Traction Control (ASR).

Passive Safety:

Front airbags, side airbags (optional), front and rear crumple zones, anti-theft immobilizer.

💡 Technology Features

Audio System:

Standard AM/FM/CD player, optional Audi Symphony or Concert premium sound systems with CD changer capability. Bose premium audio available.

Navigation:

Optional Audi Navigation System (often DVD-based) available on higher trims.

Stability Control:

Traction control (ASR) standard on many models; Electronic Stability Program (ESP) became more common on later models (late 2000/2001).

Connectivity Features:

Limited by era; typically basic features like power accessories. Aftermarket solutions for Bluetooth/USB integration are common.

🔧 Maintenance

Oil Change Interval:

Typically every 7,500 to 10,000 miles (12,000 - 16,000 km) or annually, whichever comes first, depending on oil type and driving conditions. Refer to the manual for precise intervals based on engine code and usage.

Timing Belt Replacement:

Required for 2.4L and 2.8L V6 engines, typically at 60,000 to 90,000 miles (96,000 - 144,000 km). The 1.8T and TDI engines often utilize timing chains or belts with longer intervals, but this must be verified in the manual.

Engine Oil Type:

Synthetic API SJ or higher, viscosity typically 5W-40 or 5W-30 for gasoline engines. TDI engines may require specific diesel-rated synthetic oils. Always consult the manual for the exact specification (e.g., VW 500.00, 502.00, 505.00, 505.01).

Coolant Type:

G12/G12+ (Pink/Red) ethylene glycol-based coolant mixed with distilled water (50/50 ratio).

Brake Fluid Type:

DOT 4.

Transmission Fluid Type Manual:

API GL-4 or GL-5 gear oil, viscosity typically 75W-90. Specific Audi approval may be required (e.g., G 005 210 or G 052 171).

Transmission Fluid Type Automatic:

ATF (Automatic Transmission Fluid) meeting specific Audi/VW specifications (e.g., G 052 162 for Tiptronic 01N).

Common Failures:

Ignition coil failure (especially on 1.8T), PCV (Positive Crankcase Ventilation) system issues (leading to oil leaks and rough idle), ABS wheel speed sensor failure, coolant flange leaks, window regulator failures, CV joint wear, exhaust manifold cracks (1.8T), potential sludge buildup with infrequent oil changes in early 1.8T engines.

Maintenance Tips:

Strict adherence to oil change intervals with quality synthetic oil is crucial for longevity, especially for the 1.8T engine. Regular inspection of hoses and vacuum lines for cracks.

📚 Vehicle History

Audi Legacy:

Audi's reputation for engineering excellence, Quattro all-wheel drive technology, and sophisticated design cultivated over decades.

B5 Introduction:

The B5 generation Audi A4 was introduced in 1994 (Europe) and 1995 (North America) as a successor to the Audi 80/90. It marked a significant step forward in design and technology for Audi in the compact executive segment.

Production Years:

1994-2001 (B5 platform).

Manufacturing Locations:

Germany (Ingolstadt, Neckarsulm).

🏆 Awards & Recognition

IIHS Top Safety Picks:

Early B5 models received good ratings in IIHS frontal offset crash tests, contributing to Audi's growing reputation for safety.

General Reception:

Praised for its refined interior, comfortable ride, Quattro all-wheel drive capability, and solid build quality, though sometimes criticized for higher maintenance costs compared to mainstream brands.