A6 Quattro Sedan V8-4.2L (BVJ) (2007)
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The shear bolts installed in the engine control module do not need to be heated for removal.
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Disconnect metal retainers from the ECM connectors.
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Disengage the connectors from the engine control module and disconnect the connector.
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Remove old Engine Control Module (ECM) (J623) and install the Engine Control Module (ECM) (J623).
Installing
Install in reverse order of removal.
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After that, the Engine Control Module (ECM) (J623) must be equipped with the metal retainer.
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Clean threaded holes for shear bolts of locking compound residue. Cleaning can be performed with a thread cutter (tap).
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Always use new shear bolts.
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Clip the cowl panel trim into the retainers on the windshield.
The procedures to follow after connecting the new ECM are described in Guided Fault-Finding and Guided Functions.