Market Segment:
Premium compact executive car, positioned as a competitor to BMW 3 Series and Mercedes-Benz C-Class.
Key Competitors 2000:
BMW 3 Series (E46), Mercedes-Benz C-Class (W202), Lexus IS, Infiniti G20.
Powertrain Options:
Available with front-wheel drive and Audi's legendary Quattro all-wheel-drive system.
Body Styles:
Offered as a sedan (8D2), Avant (station wagon) (8D5), and the rugged Allroad variant.
Performance Variants:
Includes the performance-oriented S4 and the even more potent RS4 Avant models.
Design Philosophy:
Known for its understated luxury, refined interior, and advanced Quattro all-wheel-drive system.
Engine Mechanical:
Detailed diagnostics, repair procedures, component overhaul for all engine variants.
Transmission:
Repair and maintenance for manual and automatic transmissions, including Tiptronic.
Driveline Axle:
Front and rear axle assemblies, CV joints, driveshafts, Quattro all-wheel-drive system.
Brakes:
Hydraulic system, ABS, ESP, brake disc and pad replacement, caliper service.
Suspension:
Front and rear suspension components, shock absorbers, control arms, bushings, alignment procedures.
Steering:
Power steering system, steering rack, tie rods, steering column.
Electrical System:
12V system, battery, alternator, starter, ignition system, charging system.
Lighting:
Headlights, taillights, interior lighting, bulb replacement, wiring.
Restraints:
Airbag system, seatbelts, SRS component diagnostics and replacement.
Body Frame Interior Exterior:
Body panel repair, door mechanisms, seals, trim, glass replacement, convertible top (if applicable).
Audio Visual Telematics:
Radio, navigation system, speakers, antenna, connectivity modules.
HVAC:
Climate control system, A/C compressor, heater core, ventilation, cabin filter replacement.
Accessories Equipment:
Wipers, power windows, mirrors, sunroof, towing, alarm systems.
Wiring Diagrams:
Comprehensive electrical schematics for all vehicle systems.
General Information:
Vehicle identification, specifications, torque values, diagnostic trouble codes (DTCs).
Maintenance Procedures:
Routine maintenance tasks, fluid changes, filter replacements, inspection points.
Troubleshooting:
Diagnostic procedures for common and complex issues, symptom-based troubleshooting guides.
Repair Procedures:
Step-by-step instructions for component removal, installation, and overhaul.
Diagnostics:
Engine management diagnostics, ABS/ESP diagnostics, airbag system diagnostics.
Specifications:
Detailed technical specifications, tolerances, fluid capacities, torque settings.
Wiring Schematics:
Detailed wiring diagrams for all electrical systems, including component location and connector views.
Depth:
Comprehensive factory-level repair information, suitable for professional technicians and advanced DIY enthusiasts.
Diagnostic Tools:
Mentions diagnostic procedures requiring Audi's proprietary VCDS or equivalent diagnostic tools.
Component Level Detail:
Includes detailed diagrams and procedures for component disassembly, repair, and reassembly.
Engine Code:
Multiple, including AEB, APU, ARK, AJG, APT, AVV (1.8T); AAH, ACK, ALG, AMX, APG, BBG (2.8 V6)
Displacement 1.8T:
1.8 Liters (1781 cc)
Horsepower 1.8T 150Hp Variant:
150 hp @ 5700 rpm
Torque 1.8T 150Hp Variant:
155 lb-ft @ 1950 rpm
Horsepower 1.8T 180Hp Variant:
180 hp @ 5900 rpm
Torque 1.8T 180Hp Variant:
210 lb-ft @ 1950 rpm
Displacement 2.8 V6:
2.8 Liters (2771 cc) - 30 Valve DOHC
Horsepower 2.8 V6:
200 hp @ 6000 rpm
Torque 2.8 V6:
207 lb-ft @ 3200 rpm
Displacement S4:
2.7 Liters (2671 cc) - Twin-Turbocharged V6 (2.7T)
Horsepower S4:
250 hp @ 5800 rpm
Torque S4:
258 lb-ft @ 1800-3600 rpm
Displacement Rs4:
2.7 Liters (2671 cc) - Twin-Turbocharged V6 (2.7T - 'Biturbo')
Horsepower Rs4:
380 hp @ 6000 rpm
Torque Rs4:
317 lb-ft @ 1800-4500 rpm
Engine Layout:
Inline-4 (turbocharged), V6 (naturally aspirated or twin-turbocharged)
Fuel System:
Multi-point Fuel Injection (MPI) / Electronic Fuel Injection (EFI)
Engine Management:
Engine Control Unit (ECU) with various sensor inputs (e.g., MAF, MAP, O2 sensors).
Length:
Approx. 177.7 inches (4514 mm)
Width:
Approx. 69.7 inches (1770 mm)
Height:
Approx. 55.7 inches (1415 mm)
Exterior A4 Avant Allroad
Length:
Approx. 181.1 inches (4600 mm)
Width:
Approx. 69.7 inches (1770 mm) / 71.2 inches (1808 mm) for Allroad
Height:
Approx. 56.3 inches (1430 mm) / 58.5 inches (1486 mm) for Allroad
Wheelbase:
Approx. 103.3 inches (2624 mm)
Curb Weight A4:
Approx. 3200 - 3600 lbs (1450 - 1630 kg), varies by drivetrain and engine.
Curb Weight S4:
Approx. 3680 lbs (1670 kg)
Curb Weight Rs4:
Approx. 3700 lbs (1680 kg)
Cargo Volume Sedan:
Approx. 13.4 cubic feet (380 Liters)
Cargo Volume Avant:
Approx. 17.7 cubic feet (500 Liters) with rear seats up, expandable to 54.6 cubic feet (1545 Liters) with rear seats folded.
Wheel Bolt Pattern:
5x112 mm
Tire Sizes Common:
205/55R16, 215/55R16, 225/45R17, 235/40R18 (S4/RS4)
NHTSA Crash Test Results:
Refer to specific year/model testing; often achieved good results for its era.
Traction Control:
ASR (Anti-Slip Regulation) / Traction Control System (TCS)
Stability Control:
ESP (Electronic Stability Program) - standard on later models and performance variants.
ABS:
Anti-lock Braking System (ABS)
AWD System:
Quattro all-wheel-drive system for enhanced traction and stability.
Airbags:
Frontal airbags for driver and passenger, optional side airbags.
Seatbelts:
Three-point inertia-reel seatbelts with pre-tensioners.
Body Structure:
Reinforced safety cell, crumple zones.
Service Intervals Oil Change
Oil Change Interval Synthetic:
10,000 miles or 12 months (whichever comes first) with synthetic oil. Check manual for specific oil type and viscosity grades.
Service Intervals Filters
Oil Filter Replacement:
Replace with every oil change. (e.g., Mann-Filter W712/5 or equivalent)
Air Filter Replacement:
Every 30,000 miles or as needed. (e.g., Mann-Filter C35179 or equivalent)
Cabin Filter Replacement:
Every 15,000-20,000 miles or annually. (e.g., Mann-Filter CU2200 or equivalent)
Coolant Type:
G12 (Pink) ethylene glycol-based coolant. Audi G 004 000 M2.
Coolant Change Interval:
Every 30,000 miles or 2 years for initial fill, subsequent fills every 2 years or as specified.
Brake Fluid Type:
DOT 4 (e.g., Castrol DOT 4, Pentosin DOT 4 LV)
Brake Fluid Change Interval:
Every 2 years or 30,000 miles.
Transmission Fluid Manual:
G 052 171 A1 (API GL-4 75W-90)
Transmission Fluid Automatic:
G 052 162 A1 (or equivalent LT 71141 spec ATF).
Power Steering Fluid:
G 002 000 (or equivalent Pentosin CHF 11S/202)
Ignition Coils 1.8T:
Failures are common, leading to misfires and rough running. Often replaced with improved aftermarket units.
ABS Wheel Speed Sensors:
Can fail, leading to ABS and ESP warning lights. Sensor itself may need replacement.
Control Arm Bushings:
Wear out over time, causing steering looseness and tire wear. Replacement of control arms or bushings is often necessary.
Cv Boots:
Can tear, leading to grease loss and CV joint damage. Inspect and replace as needed.
Timing Belt 1.8T V6:
Critical maintenance item for non-interference engines (1.8T) and interference engines (V6). Replace per schedule to prevent catastrophic engine damage.
Rear Main Seal Leaks:
Can develop leaks, requiring transmission removal for replacement.
Climate Control Head Unit Failures:
Pixelation or complete failure of the display on climate control units can occur.
Audi Legacy:
Audi AG, a German automobile manufacturer with a long history dating back to 1910, known for its engineering and Quattro all-wheel-drive technology.
A4 B5 Generation Intro:
The B5 generation A4 replaced the Audi 80/90 and was produced from 1994 to 2001 (Sedan) and 1996 to 2001 (Avant).
B5 Facelift:
The 2000 model year represents a mid-cycle facelift (introduced for 1999.5 model year) for the B5 generation, featuring revised exterior styling (headlights, taillights, grille) and interior updates.
S4 B5 Launch:
The high-performance S4 variant, featuring the 2.7L twin-turbo V6, debuted for the 1999 model year.
Rs4 B5 Launch:
The ultra-high-performance RS4 Avant, developed by Audi Sport GmbH (later quattro GmbH), was launched in 1999 exclusively as an Avant and a limited production model.
Allroad Launch:
The A4 Allroad, a more rugged, lifted version of the Avant with enhanced off-road capabilities, was introduced as a sub-model of the A4 in late 1999 for the 2000 model year.
Manufacturing Location:
Ingolstadt, Germany and other Audi assembly plants.