2023 Audi A4 DADA (2.0 TFSI petrol)/DAJA (2.0 TFSI petrol mild hybrid) (B9)
B9 / Sedan / Avant (wagon) / Global (not including US where 2023 is partly carryover; full update varies regionally)
DADA (2.0 TFSI petrol)DAJA (2.0 TFSI petrol mild hybrid)CDUC (2.0 TDI diesel)CYKB (2.0 TDI diesel mild hybrid)Exact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Carbon buildup on direct injection engines
- Water pump and thermostat issues after 100,000 km
- Diesel particulate filter clogging in diesel variants with short trips
First checks
- Check for oil leaks around valve cover and turbo
- Inspect timing chain tension noise
- Verify service history for scheduled oil and filter changes
Before replacing parts
- 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 feature availability vary significantly by market due to emissions regulations.
- Mild hybrid system adds an integrated starter generator, mainly on petrol engines in Europe.
- 2023 model is a facelift of the B9 generation introduced in 2015 with updated tech and styling.