2024 AUDI S4 CDUC/CDUD (B9 LCI)
B9 LCI / Sedan / Avant (wagon) depending on market / Europe, North America, Asia-Pacific (varies by engine emissions and availability)
CDUCCDUDCRECRegistro exacto de año/versiónSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Carbon buildup on intake valves due to direct injection
- Water pump and thermostat electric failures (early years)
First checks
- Check timing chain tensioner noise
- Inspect turbocharger boost leaks
Antes de cambiar piezas
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- Engine and power outputs vary slightly by market due to emissions tuning and fuel quality.
- Mild hybrid system included in most global variants for stop/start and boost function.
- Coupe and Cabriolet body styles replaced prior generation, only Sedan and Avant for 2024.