Exhaust System: Locations
Engine Management System
Exhaust System and Secondary Air Injection Overviews
Select system or component ID below to navigate to a
location view.
• 4.2L FSI BAR Exhaust System => [ 4.2L FSI BAR Exhaust System ]
• 3.6L FSI BHK Exhaust System => [ 3.6L FSI BHK Exhaust System ]
• 3.0L TDI CATA Exhaust System => [ 3.0L TDI CATA Exhaust System ]
• 3.0L TDI CNRB Exhaust System => [ 3.0L TDI CNRB Exhaust System ]
• 3.0L TFSI CJWB Exhaust System => [ 3.0L TFSI CJWB/CJWC/CJWE Exhaust System ]
4.2L FSI BAR Exhaust System
Exhaust System Assembly Overview
4 - Primary Catalytic Converter
• For right side of vehicle
6 - Exhaust Manifold
• For cylinder bank 1 (right)
8 - Heated Oxygen Sensor (HO2S) -G39-
• For cylinder bank 1 (right)
• Integrated with Oxygen Sensor (O2S) Heater -Z19-
9 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter -G130-
• For cylinder bank 1 (right)
• Integrated with Oxygen Sensor 02S) 1 (behind Three Way Catalytic Converter (TWC)) Heater -Z29-
11 - Exhaust Manifold
• Cylinder bank 2 (left)
13 - Heated Oxygen Sensor (HO2S) 2 -G108- (in front of catalytic converter)
• For cylinder bank 2 (left)
• Integrated with Oxygen Sensor (O2S) 2 Heater -Z28-
14 - Primary Catalytic Converter
• For left side of vehicle
15 - Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter -G131-
• Integrated with Oxygen Sensor 02S) 2 (behind Three Way Catalytic Converter (TWC)) Heater -Z30-
18 - Main Catalytic Converter
• For left side of vehicle
Secondary Air Injection System Version 1 Assembly Overview
4 - Secondary Air Injection (AIR) Pump Motor -V101-
• Located front right in the engine compartment below the longitudinal member
• Secondary Air Injection System Version 2 Assembly Overview location
10 - Right Secondary Air Injection (AIR) Combination Valve
• Located front of the right cylinder head
13 - Left secondary air injection (AIR) combination valve
• Located front of the left cylinder head
Secondary Air Injection System Version 2 Assembly Overview
3 - Secondary Air Injection (AIR) Pump Motor -V101-
• Located front right in engine compartment below the longitudinal member
6 - Secondary Air Injection Sensor 1 -G609-
• Located at the front of the right cylinder head
9 - Right secondary air injection (AIR) combination valve
• Located at the front of the right cylinder head
12 - Left secondary air injection (AIR) combination valve
• Located at the front of the left cylinder head
17 - Secondary Air Injection (AIR) Solenoid Valve -N112-
19 - Secondary Air Injection (AIR) Solenoid Valve 2 -N320-
3.6L FSI BHK Exhaust System
3 - Catalytic Converter - primary
4 - Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-
• Integrated with Oxygen Sensor 02S) 2 (behind Three Way Catalytic Converter (TWC)) Heater -Z30-
7 - Exhaust manifold
8 - Heated Oxygen Sensor (HO2S) 2 -G108-
• Integrated with Oxygen Sensor (O2S) 2 Heater -Z28-
Oxygen Sensors
1 - Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter -G131-
2 - Heated Oxygen Sensor (HO2S) 2 -G108-
3 - Heated Oxygen Sensor (HO2S) -G39-
- Integrated with Oxygen Sensor (O2S) Heater -Z19-
4 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter -G130-
- Integrated with Oxygen Sensor 02S) 1 (behind Three Way Catalytic Converter (TWC)) Heater -Z29-
Oxygen Sensor Connectors
1 - To Oxygen Sensor (O2S) behind Three Way Catalytic Converter -G130-
2 - To Heated Oxygen Sensor (HO2S) -G39-
3 - To Oxygen Sensor (O2S) 2 behind Three Way Catalytic Converter -G131-
4 - To Heated Oxygen Sensor (HO2S) 2 -G108-
3.0L TDI CATA Exhaust System
1 - SCR - Catalytic Converter
2 - Exhaust Gas Temperature (EGT) Sensor 4 -G648-
3 - Particle Filter
4 - Primary Catalytic Converter
5 - Exhaust Gas Temperature (EGT) Sensor 3 -G495-
6 - Catalyst Temperature Sensor 1 -G20-
• Engine code CATA only
7 - Exhaust Gas Temperature (EGT) Sensor 2 -G448-
• Engine code CATA only
9 - NOX Sensor -G295- => [ NOx Sensor Control Module ] See Image Below.
• With integrated NOX Sensor Control Module -J583-
10 - Heated Oxygen Sensor (HO2S) -G39- with Oxygen Sensor (O2S) Heater -Z19-
12 - Exhaust Gas Temperature (EGT) Sensor 1 -G235-
13 - Differential Pressure Sensor -G505-
15 - Pressure Lines for the Differential Pressure Sensor -G505-
16 - NOx Sensor 2 -G687- => [ NOx Sensor 2 Control Module ] See Image Below.
• With integrated NOx Sensor 2 Control Module -J881-
NOx Sensor Control Module
1 - NOX Sensor Control Module -J583- with integrated NOX Sensor -G295- connector
NOx Sensor 2 Control Module
1 - NOx Sensor 2 Control Module -J881- with integrated NOx Sensor 2 -G687- connector
3.0L TDI CNRB Exhaust System
1 - SCR - Catalytic Converter
2 - Exhaust Gas Temperature (EGT) Sensor 4 -G648-
3 - Particulate sensor -G784-
4 - Primary Catalytic Converter
5 - Exhaust Gas Temperature (EGT) Sensor 3 -G495-
6 - Catalyst Temperature Sensor 1 -G20-
• Engine code CATA only
7 - Exhaust Gas Temperature (EGT) Sensor 2 -G448-
• Engine code CATA only
9 - NOX Sensor -G295- => [ NOx Sensor Control Module ] See Image Below.
• With integrated NOX Sensor Control Module -J583-
10 - Heated Oxygen Sensor (HO2S) -G39- with Oxygen Sensor (O2S) Heater -Z19-
12 - Exhaust Gas Temperature (EGT) Sensor 1 -G235-
13 - Differential Pressure Sensor -G505-
15 - Pressure Lines for the Differential Pressure Sensor -G505-
16 - NOx Sensor 2 -G687- => [ NOx Sensor 2 Control Module ] See Image Below.
• With integrated NOx Sensor 2 Control Module -J881-
NOx Sensor Control Module
1 - NOX Sensor Control Module -J583- with integrated NOX Sensor -G295- connector
NOx Sensor 2 Control Module
1 - NOx Sensor 2 Control Module -J881- with integrated NOx Sensor 2 -G687- connector
3.0L TFSI CJWB/CJWC/CJWE Exhaust System
1 Oxygen sensor 2 after catalytic converter -G131-
2 Heated oxygen sensor 2 -G108-
3 Heated oxygen sensor -G39-
4 Oxygen sensor after three way catalytic converter -G130-
