Complete factory service repair manual for the Audi A4 2001 Electrical. Easy-to-read text sections with top quality diagrams and instructions, written for do-it-yourself and professional use.
Step-by-step repair procedures for electrical components and circuits.
Wiring Diagrams:
Detailed, comprehensive wiring schematics for all vehicle systems.
Component Replacement:
Instructions for replacing various electrical parts like sensors, modules, switches, motors.
Testing Calibration:
Procedures for testing electrical components and calibrating systems.
Technical Depth
Depth:
Comprehensive factory-level detail, suitable for professional technicians and advanced DIYers.
๐ Manual Specifications
File Format
File Type:
PDF (Portable Document Format)
Searchability:
Searchable text for quick information retrieval.
Print Quality
Diagrams:
High-quality, clear, and accurate diagrams and illustrations.
Text Readability:
Easy-to-read text formatting.
Binding Type
Binding:
N/A (Digital Format)
Paper Type
Paper Quality:
N/A (Digital Format)
โ๏ธ Engine Specifications
Primary Engine
Engine Code 1.8T:
AEB, APU, ARK, AWM (1.8L Turbocharged Inline-4)
Engine Code 2.8 30V:
ACK, AMX, APR, AQD (2.8L Naturally Aspirated V6)
Engine Code 2.7T:
APX, AZR (2.7L Twin-Turbocharged V6, typically S4 model)
Performance 1.8T
Horsepower 1.8T:
170 hp @ 5900 rpm
Torque 1.8T:
164 lb-ft @ 1950 rpm (can vary slightly by code)
Performance 2.8 30V
Horsepower 2.8 30V:
190 hp @ 6000 rpm
Torque 2.8 30V:
207 lb-ft @ 3200 rpm
Performance 2.7T
Horsepower 2.7T:
250 hp @ 5800 rpm (S4)
Torque 2.7T:
258 lb-ft @ 1850 rpm (S4)
Fuel System
Fuel Type:
Unleaded Gasoline (Premium Recommended/Required)
Injection Type:
Electronic Multi-Point Fuel Injection (MPI)
Engine Layout
Layout 1.8T:
Inline-4, Transverse Mount
Layout 2.8 30V:
V6, Transverse Mount
Layout 2.7T:
V6 Twin-Turbocharged, Transverse Mount
๐ง Transmission
Standard
Transmission Std 1.8T:
5-speed Manual
Transmission Std 2.8 30V:
5-speed Tiptronic Automatic
Optional
Transmission Opt 1.8T:
5-speed Tiptronic Automatic
Transmission Opt 2.8 30V:
6-speed Manual (less common)
Transmission Opt 2.7T:
6-speed Manual (S4)
Features
AWD System:
Torsen center differential based quattro AWD system available on most trims/engines.
Tiptronic Functionality:
Allows manual gear selection via selector lever or steering wheel buttons.
๐ Dimensions
Exterior Sedan
Length:
185.1 inches (4702 mm)
Width:
69.3 inches (1760 mm)
Height:
56.5 inches (1435 mm)
Wheelbase:
102.7 inches (2609 mm)
Weights
Curb Weight Est FWD:
3200 - 3400 lbs (1450 - 1540 kg)
Curb Weight Est Quattro:
3400 - 3700 lbs (1540 - 1680 kg)
Cargo
Trunk Volume Sedan:
15.4 cu ft (436 L)
๐ก๏ธ Safety Features
Ratings Nhtsa
Driver Front Impact 2001:
โ โ โ โ โ (4/5 stars)
Passenger Front Impact 2001:
โ โ โ โ โ (4/5 stars)
Side Impact Driver 2001:
โ โ โ โ โ (4/5 stars)
Side Impact Rear Passenger 2001:
โ โ โ โ โ (4/5 stars)
Active Features
ABS:
Standard Anti-lock Braking System
Esp:
Optional Electronic Stability Program (ESP) on some models.
Traction Control:
Traction Control System (ASR) often integrated with ESP or quattro.
Passive Features
Airbags:
Driver and front passenger airbags, optional side airbags.
Seatbelts:
Three-point inertia-reel seatbelts with pre-tensioners.
๐ก Technology Features
Infotainment
Audio System:
Factory Audi Chorus or Symphony radio systems with CD player, optional navigation. Aftermarket upgrades are common.
Driver Assistance
Cruise Control:
Standard on most trims.
Parking Sensors:
Optional rear parking sensors on some models.
Connectivity
Phone Integration:
Optional factory Bluetooth preparation or accessory kits available.
๐ง Maintenance
Service Intervals
Oil Change Interval:
Typically every 7,500 to 10,000 miles (12,000 to 16,000 km) or 12 months, depending on driving conditions and oil type used (e.g., LongLife oils).
Timing Belt Interval:
For 30-valve V6 engines (2.8L), replacement is crucial, typically every 75,000 miles (120,000 km). For the 1.8T, it's a timing chain system. S4 2.7T uses timing belts.
Spark Plug Interval:
Refer to manual, generally 60,000-100,000 miles for platinum/iridium plugs.
Fluid Specifications
Engine Oil Type:
API SJ or higher, ACEA A3/B3 or A3/B4. Viscosity typically 5W-40 or 0W-40. Always consult the owner's manual for specific recommendations, especially for VW 502.00/505.00 specifications.
Coolant Type:
G12 or G12+ (pink/red ethylene glycol coolant, 50/50 mix with distilled water).
Brake Fluid Type:
DOT 4
Transmission Fluid Manual:
Gear oil, e.g., GL-4 or GL-5 specification (specific weight to be confirmed in manual).
Transmission Fluid Automatic:
ATF Dexron III or equivalent. Long-life synthetic ATF often recommended for Tiptronic.
Known Issues Electrical
ABS Esp Module Failure:
Common failure point, leading to ABS/ESP warning lights. Often requires module replacement or repair.
Window Regulator Motors:
Can fail, leading to power window operation issues.
Central Locking Actuators:
Actuators can fail, preventing doors from locking/unlocking electronically.
Mass Air Flow Sensor Maf:
Can become dirty or fail, causing rough idling, poor acceleration, and check engine lights.
Ignition Coil Packs:
Failure can lead to misfires, rough running, and check engine lights (especially on 1.8T).
Headlight Leveling Sensors:
Failure can cause HID headlight leveling issues and associated warning lights.
๐ Vehicle History
Brand Heritage
Heritage:
Audi, a German automobile manufacturer founded in 1910, is renowned for its luxury, performance, and advanced engineering, particularly its pioneering use of quattro all-wheel drive.
Model Evolution
A4 B5 Generation:
The first generation Audi A4 (B5) was introduced in 1994, replacing the Audi 80. The 2001 model year is the final year of the B5 generation.
A4 B6 Transition:
The 2001 model year also saw the introduction of the B6 generation A4 in late 2000/early 2001 in some markets, though this manual specifically targets the B5 platform's electrical systems.
Production
Manufacturing Locations:
Ingolstadt and Neckarsulm, Germany; also Volkswagen Group plants in other countries.
๐ Awards & Recognition
Recognitions
Car And Driver Ota:
Audi A4 models have frequently appeared on Car and Driver's 10Best lists in various years and iterations, acknowledging its overall quality and performance.