Segment:
Premium Compact Executive Convertible
Target Audience:
Enthusiasts seeking to maintain or repair their Audi A4 Cabriolet, DIY mechanics, and professional automotive workshops.
Competitors 2003:
BMW 3 Series Convertible (E46), Mercedes-Benz CLK Convertible (W208/A208), Saab 9-3 Convertible, Volvo C70 Convertible.
Design:
Sleek styling, high-quality interior, advanced convertible top mechanism, Quattro all-wheel-drive availability.
Premium Appeal:
Represents Audi's commitment to luxury, performance, and sophisticated design in the convertible segment.
Primary Coverage:
Electrical Systems
Secondary Coverage:
Battery, Starter, Generator, Cruise Control, Windshield Wiper/Washer, Exterior Lights, Switches, Interior Lights, Wiring, Power Top System
Estimated Page Count:
Extensive (typically 500+ pages for a complete electrical manual)
Type:
Factory Service Repair Manual / Workshop Manual
Electrical Systems:
Comprehensive coverage including wiring diagrams, component locations, diagnostic procedures, and repair instructions for all electrical systems.
Powertrain Electrical:
Engine control module (ECM) diagnostics, ignition system, fuel injection system, charging system (generator/alternator), starting system (starter).
Chassis Electrical:
ABS, ESP (Electronic Stability Program), power steering, instrument cluster, cruise control.
Body Electrical:
Lighting (headlights, taillights, interior, fog lights), power windows, power locks, power mirrors, central locking system, remote keyless entry.
Comfort Convenience:
Climate control system (HVAC), power seats, heated seats, power convertible top operation and control, sound system, navigation system (if equipped).
Power Top System:
Detailed diagnostics, repair, and maintenance procedures for the hydraulic pump, cylinders, actuators, switches, and control module of the power convertible top.
Diagnostics:
Troubleshooting flowcharts, symptom-based diagnostics, component testing, diagnostic trouble codes (DTCs) interpretation and clearing.
Repair:
Step-by-step repair instructions for common electrical faults and component replacements.
Maintenance:
Battery maintenance, fuse and relay testing and replacement, bulb replacement procedures.
Wiring Diagrams:
Detailed, component-level wiring schematics with wire colors, connector pinouts, and circuit descriptions.
Component Replacement:
Removal and installation procedures for key electrical components like alternators, starters, ECUs, switches, motors, and sensors.
Fuse And Relay Checks:
Identification of fuse boxes, specific fuse and relay functions, testing procedures, and replacement guidelines.
Depth:
Advanced diagnostic procedures, component-level repair, and in-depth troubleshooting for complex electrical issues. Suitable for professional mechanics and advanced DIYers.
Component Testing:
Includes resistance, voltage, and continuity testing for various electrical components and circuits.
Format Details:
PDF (Portable Document Format)
Searchability:
PDF format typically allows for text searching of keywords, aiding in quick troubleshooting.
Printability:
Printable without restrictions, allowing users to print specific sections or the entire manual.
Binding:
Digital Download (no physical binding)
Paper:
N/A (Digital format)
Reader:
Adobe Acrobat Reader or compatible PDF viewer.
Engine Options 2003:
1.8L Turbocharged Inline-4 (AMB), 3.0L V6 (ASN/AVK)
1.8T Horsepower:
170 hp @ 5900 rpm
1.8T Torque:
164 lb-ft @ 1950-4700 rpm
3.0L V6 Horsepower:
220 hp @ 6300 rpm
3.0L V6 Torque:
221 lb-ft @ 3200 rpm
Injection:
Multi-point Fuel Injection (MPI)
ECM:
Bosch Motronic or similar electronic engine control module.
Diagnostic Ports:
OBD-II diagnostic connector, typically located under the dashboard on the driver's side.
Standard Transmission:
5-speed Manual (available on 1.8T)
Optional Transmission:
5-speed Tiptronic Automatic (available on both engines, standard on 3.0L V6 in some markets)
Quattro AWD:
Available with Quattro all-wheel drive, typically paired with the Tiptronic transmission.
Automatic Transmission Fluid:
Audi G 055 025 or equivalent (e.g., Pentosin ATF1)
Manual Transmission Fluid:
VW 501 50 (G 052 911)
NHTSA Front Impact:
Not explicitly rated for 2003 model year, but generally good safety structure.
IIHS Side Impact:
Not specifically rated for 2003 model year.
Traction Control:
ASR (Anti-Slip Regulation) standard, ESP (Electronic Stability Program) available.
Braking System:
Four-wheel disc brakes with ABS.
Airbags:
Front airbags, side airbags integrated into seats, and deployable rollover protection bars.
Audio System:
Audi Chorus or Concert CD player, optional Symphony system with more speakers and amplifier. Bose premium sound system available.
Navigation:
Optional Audi Navigation System Plus with CD-ROM based maps.
Parking Assistance:
Optional rear parking sensors (Audi parking system).
Bluetooth:
Rarely factory-equipped in 2003; aftermarket solutions more common.
Top Operation:
Fully automatic electro-hydraulic convertible top with one-touch operation and insulated fabric roof.
Oil Change Interval:
Typically 10,000 miles or 12 months (depending on driving conditions and oil used - consult manual for exact specifications).
Timing Belt Interval:
3.0L V6 uses a timing chain, 1.8T uses a timing belt. Belt replacement interval typically 70,000-90,000 miles or 7 years.
Engine Oil Specification:
SAE 5W-40 or 5W-30 synthetic oil meeting VW 502 00 or VW 503 01 specifications.
Coolant Specification:
G12 Plus coolant (pink) or equivalent, mixed with distilled water.
Brake Fluid Specification:
DOT 4
Power Steering Fluid:
Pentosin CHF 11S or equivalent.
Electrical Common Issues:
Convertible top hydraulic leaks, window regulator failures, ABS/ESP sensor faults, ignition coil failures (especially on early 1.8T engines), dashboard pixelation on MFD.
Powertrain Common Issues:
Oil consumption (particularly on 3.0L V6), PCV system issues, potential coolant leaks.
Ward S 10 Best Engines:
The 3.0L V6 engine received Ward's 10 Best Engines award in 2002 (for the preceding model year, but relevant to the engine's pedigree).
Consumer Reports Reliability:
Reliability ratings for this model year vary, with some electrical and powertrain components noted for potential issues. The manual helps address these.
