Work sequence

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, and 2003 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Removing Engine Cover

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Remove engine cover - arrows -.
Switch off ignition.

Fig 2: Ignition Coils, Ground Wire And Connectors

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Disconnect connectors - 3 -.
Pull out ignition coils - 1 -.
Use spark plug wrench 3122B to remove spark plugs.
Disconnect connectors from all injectors.

Fully open throttle valve.
Check compression with compression tester VAG1381 or VAG1763.

NOTE:

Using the compression tester.

Operate starter until tester shows no further pressure increase.

Compression pressure

New (bar)	Wear limit (bar)	Difference between cylinders (bar)
9.0...14.0	7.5	max. 3.0

Install spark plugs and ignition coils.

NOTE:

Replace gaskets for ignition coils if damaged.

Check Diagnostic Trouble Code (DTC) memory: → Guided Fault Finding in VAS5051 - 01 ON BOARD DIAGNOSTIC (OBD)

NOTE:

Diagnostic Trouble Codes (DTCs) will have been recorded in DTC memory because connectors have been disconnected. Check and, if necessary, erase DTC memory after completing check.