03 · Engine

Secondary air system

Make: Audi
Model: A4 Cabriolet Mk2
Section: 6-cylinder engine, mechanics › Exhaust system › Secondary air system

‹ Prev Checking exhaust system for leaks Next › Principle and function

Power unitSecondary 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.

‹ Prev Checking exhaust system for leaks Next › Principle and function

Parts & tools for this job For Audi A4

PARTExhaust gasketSearch: Audi A4 exhaust gasket
TOOLPenetrating oilSearch: penetrating oil
TOOLOBD2 scannerSearch: OBD2 scanner

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