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Home >> Audi >> 2019 >> A4 Premium Plus >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Generic Scan Tool [DBPA] (General Information) >> Generic Scan Tool >> Description And Operation >> Exhaust Systems >> Overview
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Exhaust Systems: Overview

There are three important functions of the exhaust system: to reduce the pollutants in exhaust gas, muffle engine combustion noise and to discharge exhaust gas at a convenient location on the vehicle (often underneath the rear bumper). A passenger-car exhaust system consists of the following; exhaust manifold, exhaust treatment components, sound absorption components and the system of pipes connecting these components.