Audi Q7: Heating, Ventilation & Air Conditioning

 Plenum Chamber Bulkhead, Removing and Installing

Plenum Chamber Bulkhead, Removing and Installing Removing - Drain the coolant. Refer to → Engine Mechanical; Rep. Gr.19; Cooling System/Coolant; Coolant, Draining and Filling. - Remove the plenum chamber cover. Refer to → Chapter "Plenum Chamber Cover, Removing an

 Secondary Air Injection Pump Relay - J299- / Secondary Air Injection Pump Motor - V101-, Checking

General Description The secondary air injection system sends air into the exhaust using passages in the cylinder head. This extra air injection takes place using the Secondary Air Injection Pump Motor -V101- that is powered by the Secondary Air Injection Pump Relay -J299- on a cold-start of the