Vehicle exhaust system Audi A6 C5 Allroad

General information about the exhaust system
The main elements of the exhaust system are the main and additional mufflers, the inlet pipe, the catalytic converter, the exhaust manifold, and the...

Exhaust system — vehicles with petrol engine
1.0. Exhaust system. Cars with petrol engine: 2 - bracket mounting bolt. Tightening torque - 23 Nm 3 - additional muffler suspension bracket with rubber pads 4...

Exhaust system — diesel vehicles
1.0a. Exhaust system. Vehicles with diesel engine: 1 - additional muffler 2 - bracket mounting bolt. Tightening torque - 25 Nm 3 - additional muffler...

Operating principle of the catalyst
All vehicles are equipped with one or more catalytic converters to reduce emissions of harmful substances along with exhaust gases. The catalyst consists of a...

EGR system components
2.0. Components of the EGR system: 1 - to the air filter 2 - low pressure hose 3 - low pressure hose of the boost air pressure reducing valve 4-vacuum booster...

Afterburner system components
2.0a. Components of the afterburning system: 1 - electric motor of the air pump of the afterburning system 2 - air pump relay of the afterburning system 3 -...

Exhaust gas turbocharger
Diesel-powered vehicles are equipped with a turbocharger powered by exhaust gases. The turbocharger has two turbine wheels mounted on one shaft, which are...

Intake pipe — removal and installation
Removal Cars with gasoline engines 1. Remove the engine protective cover (see arrows in the illustration). 4.1 Remove the engine protective cover (see arrows)...

Exhaust system — fitting
After each removal of the exhaust pipes, they must be straightened to avoid stress, which can lead to cracks or noise during driving. The exhaust system must...

Exhaust manifold — design description
6.0. Exhaust manifold. Vehicles with diesel engine: 1 - bolt. Tightening torque - 25 Nm 2 - exhaust manifold 3 - sealing gasket. To be replaced after each...

Exhaust manifold — removal and installation
Removal Cars with gasoline engines 1. Remove the engine (see the relevant chapter). 2. Disconnect plugs 1 and 4 (left cylinder head) or plugs 1 and 2 (right...

Turbocharger — design description
7.0. Turbocharger: 1 - return oil line sealing ring. To be replaced after each dismantling 2 - return oil line 3 - return oil line sealing gasket. To be...

Turbocharger — removal and installation
Removal 1. Disconnect the additional catalytic converter. 2. Remove the air filter cover 2 and disconnect the air intake 1 (see illustration). 7.2. Remove the...

Exhaust system — leak test
In vehicles with a regulated catalytic converter, leaks in the exhaust system in the area before the oxygen sensor can cause the following malfunctions: a)...

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A6(C5 AR, 1999-2005)

A6(C5, 1997-2004)

A6(C4, 1994-1997)