audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

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Principle and function > < Tightening torques

A4 Mk1

Secondary air system - vehicles with engine code letters ANA
Secondary air system - vehicles with engine code letters ANA
The secondary air system is designed to enable the catalytic converter to heat up and reach its operating temperature more quickly after a cold start.
   

Principle and function > < Tightening torques