Audi Workshop Service and Repair Manuals > A4 Mk2 > Power unit | 8-cylinder engine (4.2 ltr. 5-valve with timing chains), mechanics | Exhaust system

Principle and function > < Checking exhaust system for leaks

Servicing secondary air system

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.

Power unit
8-cylinder engine (4.2 ltr. 5-valve with timing chains), mechanics
Exhaust system
Servicing secondary air system

Principle and function > < Checking exhaust system for leaks

Audi Workshop Service and Repair Manuals

A4 Mk2

Power unit 8-cylinder engine (4.2 ltr. 5-valve with timing chains), mechanics Exhaust system Servicing secondary air system

Power unit 8-cylinder engine (4.2 ltr. 5-valve with timing chains), mechanics Exhaust system Servicing secondary air system

Power unit
8-cylinder engine (4.2 ltr. 5-valve with timing chains), mechanics
Exhaust system
Servicing secondary air system

Power unit
8-cylinder engine (4.2 ltr. 5-valve with timing chains), mechanics
Exhaust system
Servicing secondary air system