2023 AUDI S5 CDUC/DMHA (F5)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Carbon buildup on intake valves (direct injection engines)
• Turbocharger wastegate rattle in early production models
• Mild hybrid battery degradation after 100,000+ km

First checks

• Inspect turbocharger for noise or leaks
• Check oil quality and level regularly
• Monitor brake pads and discs wear

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

• Mild hybrid system adds 48V electrical system for improved efficiency, start-stop, and torque assist.
• Market-specific emission controls may cause minor variation in horsepower and torque ratings.