Vehicle injection system (gasoline) Audi A6 C5 Allroad

General information and precautions
Audi Allroad vehicles with petrol engines are equipped with the BOSCH-Motronic fuel injection system. Unlike other systems, the Motronic system uses sequential...

Sensors and actuators of the injection system
1.0. Sensors and actuators of the injection system: 1 - 4-pin plug of the main lambda probe 1 (green color) 2 - 4-pin plug of the main lambda probe 2 (brown...

Intake manifold and related components
2.0. Intake Manifold and Related Components. Vehicles with 2.7L Engine: 1 - fuel pressure reducing valve 2 - electromagnetic valve for purging the adsorber 3 -...

Intake manifold — removal and installation
Removal Cars with 2.7L engine 1. Unscrew the bolts (see arrows in the illustration) and remove the engine protective covers A-C. 2.1. Unscrew the bolts (see...

Fuel rail and related components
3.0. Fuel rail. Cars with 2.7L engine: 1 - connecting fuel line 2 - low pressure hose of the fuel pressure regulator 3 - clamp 4 - sealing ring. To be replaced...

Fuel rail — removal and installation
Attention! The procedure is given using the example of cars with a 2.7 liter engine. Attention! The fuel rail, consisting of two parts, functions as a single...

Engine Control Unit — Removal and Installation
Removal 1. Turn off the ignition. Disconnect the ground (-) cable terminal from the negative battery terminal. 2. Remove the rubber gasket of the waterproof...

Injection system — check
It is almost impossible to check the fuel injection system yourself, as this requires the appropriate measuring instruments and a good knowledge of the system....

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A6(C5 AR, 1999-2005)

A6(C5, 1997-2004)

A6(C4, 1994-1997)