Buy 2003 Audi S4 Secondary Air Injection Pump Check Valve. 4.2 LITER, ENGINE AREA. A5, S5; 4.2L; Right ENGINE, EMISSION, SYSTEM - OEM Audi Part # 079131102A (079-131-102-A)

Combination Valve. EGR Valve. Secondary Air Injection Pump Check Valve.
Combi Valve. Secondary Air Injection Pump Check Valve. To 05/31/2010.

Secondary Air Injection Pump Check Valve

Fits S5

4.2 LITER, ENGINE AREA. A5, S5; 4.2L; Right.
Air Injection System Check Valve - Repair or Replace
A failed air injection solenoid or secondary air valve will often have no noticeable symptoms beyond a check engine light, but it does cause your 2003 Audi S4 to operate inefficiently and produce higher emissions. Our technicians have access to manufacturer-approved repair processes and Audi genuine parts.