Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2004A4 BASE, 4D SEDAN, 3.0 TREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEM3.0L - IGNITION/GLOW PLUG SYSTEM, ENGINE CODES: AVK, BGN
2004 Audi A4 Base, 4D Sedan, 3.0 T
3.0L - Ignition/Glow Plug System, Engine Codes: AVK, BGN
2004 Audi A4 Base, 4D Sedan, 3.0 TSECTION 3.0L - Ignition/Glow Plug System, Engine Codes: AVK, BGN
- Ignition/Glow plug system
- Ignition system, checking
- General notes on ignition system
- Safety precautions
- Technical data for ignition system
- Ignition coils with output stages, checking
- Motronic Engine Control Module (ECM) power supply relay -J271-, checking
- Engine speed (RPM) sensor -G28-, checking
- Intake Air Temperature (IAT) sensor -G42-, checking
- Engine Coolant Temperature (ECT) Sensor -G62-, checking
- Engine Control Module (ECM) power supply, checking
- Knock control stop, checking
- Knock sensors, checking
- Camshaft Position (CMP) sensor, checking
- Misfire detection, checking
- Ignition system, checking
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.