Component overview: Notes

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The following list refers to Fig 1.

- Secondary Air Injection (AIR) Pump Motor -V101-
- Component location. See COMPONENT LOCATION OF SECONDARY AIR INJECTION (AIR) PUMP MOTOR -V101- .
- Checking. See CHECK VOLTAGE SUPPLY OF THE SECONDARY AIR INJECTION (AIR) PUMP MOTOR .
- Air filter housing
- Combination valve for Secondary Air Injection (AIR) system
- Component location. See COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM .
- Checking. See COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM, CHECKING FUNCTION AND FOR PROPER SEAL .
- Check-valve
- Installation position (light/dark side): Arrow points in direction of flow, as shown in Fig 1.
- Secondary Air Injection (AIR) Pump Relay -J299-
- Component location. See COMPONENT LOCATION OF SECONDARY AIR INJECTION (AIR) PUMP RELAY -J299- .
- Checking. See SECONDARY AIR INJECTION (AIR) PUMP RELAY -J299- AND ACTIVATION, CHECKING .
- Motronic Engine Control Module (ECM) -J220-
- Vacuum reservoir
- Component location: Under wheel housing liner in front left wheel housing
- Secondary Air Injection (AIR) solenoid valve -N112-
- Component location. See COMPONENT LOCATION OF SECONDARY AIR INJECTION (AIR) SOLENOID VALVE -N112- AND RECIRCULATING VALVE FOR TURBOCHARGER -N249- .
- Checking. See SECONDARY AIR INJECTION (AIR) SOLENOID VALVE -N112- CHECKING .
- Cylinder head

Fig 1: Identifying Secondary Air System Components

Courtesy of AUDI OF AMERICA, INC.