2015 AUDI S7 CJGD (4G)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Carbon buildup on intake valves due to direct injection
• Potential timing chain tensioner wear
• High cost of maintenance and replacement parts

First checks

• Verify oil service history with correct oil specification
• Check timing chain and tensioner noise
• Inspect turbocharger condition and wastegate operation

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

• The 2015 Audi S7 was available globally with minor market variations in emissions and tuning.
• The engine code CJGD refers to the twin-turbo V8 petrol variant sold in most markets including the USA and Europe.