S5 Quattro Coupe V8-4.2L (CAUA) (2009)
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Disengage the wiring harness - 2 - at the mounts - A -.
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Remove nut - 1 -.
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Remove the filler neck - 3 - with the filler tube from the washer fluid reservoir and the opening in the body.
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Remove the bolts - arrows - and cover from the E-box.
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Release the retainers - arrows A - and remove the Engine Control Module (ECM) (J623) - arrow B -.
The engine control module - 1 - is secured in a metal housing - 5 - with retaining tabs - 2 - and shear bolts - 3 and 4 - to make it harder to access it.
‹› Some engine control modules are not equipped with a protective housing. A protective housing is not installed in vehicles with automatic
transmissions.
The threads of the shear bolts - 4 - (that are not screwed into the ECM) are coated with a locking compound. For this reason, the threads must be
heated with the heat gun to remove both bolts.
The threads of both shear bolts - 3 -, that are screwed into the ECM, are not coated with a locking compound. The threads in the ECM housing must
not be heated and do not require to be heated (unintentional heating of the ECM).
