Operation CHARM: Car repair manuals for everyone.
Home >> Audi >> 2007 >> A8L Quattro Sedan (4E8) W12-6.0L (BSB) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Locations >> Component Locations Overview

Component Locations Overview






Component Locations

Components A through E are not shown in the exploded view illustration.





A - Brake light switch (-F-) and Brake pedal switch (-F47-)

• In footwell at brake pedal

B - Data Link Connector

• Located in knee bolster on driver's side

C - Throttle position (TP) sensor (-G79-) and Sender 2 for accelerator pedal position (-G185-)

• In footwell on accelerator pedal (both sensors are integrated into one housing)

D - "MIL" Warning lamp

• In instrument cluster

E - "EPC" Warning lamp

• In instrument cluster

1 - Mass Air Flow (MAF) sensor 2 (-G246-) with Intake Air Temperature (IAT) sensor 2 (-G299-)

• For cylinder bank 2 (cylinders 7 to 12)

• Removing and installing => [ Installing ] Mass Air Flow Sensor 2

• The intake channels cross in the center of the intake manifold. The Mass Air Flow (MAF) sensor 2 (-G246-) on the right side (as seen in driving direction) therefore measures the intake air mass for cylinder bank 2 on the left side (as seen in driving direction). The same applies to the Intake Air Temperature (IAT) sensor 2 -G299-.

2 - Electrical connections for oxygen sensors

3 - Throttle valve control module 2 (-J544-)

• with Throttle drive 2 (power accelerator actuation) (-G296-), Angle sensor 1 (on throttle drive 2 power accelerator actuation) (-G297-) and Angle sensor 2 (on throttle drive 2 power accelerator actuation) (-G298-)

• For cylinder bank 2 (cylinders 7 to 12)

• Pay attention to first phrase in above mentioned note

4 - Engine Control Module (ECM) 2 (-J624-)

• In Electronics box in plenum chamber

• Mark before disconnecting, to prevent switching with Engine Control Module (ECM) 1

5 - Engine Control Module (ECM) (-J623-)

• In Electronics box in plenum chamber

• Mark before disconnecting, to prevent switching with Engine Control Module (ECM) 2

6 - Camshaft Position (CMP) sensor 3 (-G300-)

• For exhaust camshaft

• Cylinder bank 1

7 - Camshaft Position (CMP) sensor 2 (-G163-)

• For intake camshaft

• Cylinder bank 2

8 - Camshaft Position (CMP) sensor (-G40-)

• For intake camshaft

• Cylinder bank 1

9 - Engine speed (RPM) sensor (-G28-)

10 - Camshaft Position (CMP) sensor 4 (-G301-)

• For exhaust camshaft

• Cylinder bank 2

11 - Throttle valve control module (-J338-)

• with Throttle drive (power accelerator actuation) (-G186-), Angle sensor 1 for throttle drive (power accelerator actuation) (-G187-) and Angle sensor 2 for throttle drive (power accelerator actuation) (-G188-)

• For cylinder bank 1 (cylinders 1 to 6)

12 - Mass Air Flow (MAF) sensor (-G70-) with Intake Air Temperature (IAT) sensor (-G42-)

• For cylinder bank 1 (cylinders 1 to 6)

• Removing and installing => [ Removing ] Mass Air Flow Sensor 2

• The intake channels cross in the center of the intake manifold. The Mass Air Flow (MAF) sensor (-G70-) on the left side (as seen in driving direction) therefore measures the intake air mass for cylinder bank 1 on the right side (as seen in driving direction). The same applies to the Intake Air Temperature (IAT) sensor (-G42-).

13 - Mechanical EGR valve

14 - Mechanical EGR valve

15 - Secondary Air Injection (AIR) pump motor 2 (-V189-)

• For cylinder bank 2

• In lower part of air filter housing

16 - Secondary Air Injection (AIR) pump motor (-V101-)

• For cylinder bank 1

• In lower part of air filter housing

Oxygen sensor connector





1 - Connector for Heated Oxygen Sensor (HO2S) 3 (-G285-), before catalytic converter

• Exhaust bank 3 (cylinder 7, 8, 9)

• 6-pin, black

2 - Connector for Heated Oxygen Sensor (HO2S) 4 (-G286-), before catalytic converter

• Exhaust bank 4 (cylinder 10, 11, 12)

• 6-pin, brown

3 - Connector for Oxygen Sensor (O2S) 3 Behind Three Way Catalytic Converter (TWC) (-G287-)

• Exhaust bank 3 (cylinder 7, 8, 9)

• 4-pin, green

4 - Connector for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (-G130-).

• Exhaust bank 1 (cylinder 1, 2, 3)

• 4-pin, black

5 - Connector for Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (-G131-).

• Exhaust bank 2 (cylinder 4, 5, 6)

• 4-pin, brown

6 - Connector for Oxygen Sensor (O2S) 4 Behind Three Way Catalytic Converter (TWC) (-G288-)

• Exhaust bank 4 (cylinder 10, 11, 12)

• 4-pin, gray

7 - Connector for Heated Oxygen Sensor (HO2S) 2 (-G108-), before catalytic converter

• Exhaust bank 2 (cylinder 4, 5, 6)

• 6-pin, brown

8 - Connector for Heated Oxygen Sensor (HO2S) (-G39-), before catalytic converter

• Exhaust bank 1 (cylinder 1, 2, 3)

• 6-pin, black

• For this overview, the intake manifold is removed.





1 - Camshaft adjustment valve 1 (exhaust) (-N318-)

2 - Valve 1 for camshaft adjustment (-N205-) Intake

3 - Map controlled engine cooling thermostat (-F265-)

4 - Fuel pressure regulator

5 - Valve 2 for camshaft adjustment (-N208-)

6 - Camshaft adjustment valve 2 (exhaust) (-N319-)

7 - Ignition coils with power output stages, Cylinder bank 2

• Ignition Coil 7 with Power Output Stage (-N325-)

• Ignition Coil 8 with Power Output Stage (-N326-)

• Ignition Coil 9 with Power Output Stage (-N327-)

• Ignition Coil 10 with Power Output Stage (-N328-)

• Ignition Coil 11 with Power Output Stage (-N329-)

• Ignition Coil 12 with Power Output Stage (-N330-)

• The number of each cylinder is stamped into the valve cover.

8 - Fuel injectors, Cylinder bank 2

• Cylinder 7 Fuel Injector (-N85-)

• Cylinder 8 Fuel Injector (-N86-)

• Cylinder 9 Fuel Injector (-N299-)

• Cylinder 10 Fuel Injector (-N300-)

• Cylinder 11 Fuel Injector (-N301-)

• Cylinder 12 Fuel Injector (-N302-)

• The number of each cylinder is stamped into the valve cover.

9 - Fuel injectors, Cylinder bank 1

• Cylinder 1 Fuel Injector (-N30-)

• Cylinder 2 Fuel Injector (-N31-)

• Cylinder 3 Fuel Injector (-N32-)

• Cylinder 4 Fuel Injector (-N33-)

• Cylinder 5 Fuel Injector (-N83-)

• Cylinder 6 Fuel Injector (-N84-)

10 - Ignition coils with power output stages, Cylinder bank 1

• Ignition Coil 1 with Power Output Stage (-N70-)

• Ignition Coil 2 with Power Output Stage (-N127-)

• Ignition Coil 3 with Power Output Stage (-N291-)

• Ignition Coil 4 with Power Output Stage (-N292-)

• Ignition Coil 5 with Power Output Stage (-N323-)

• Ignition Coil 6 with Power Output Stage (-N324-)

11 - Right Electro-hydraulic engine mount solenoid valve (-N145-)

• The oxygen sensors, exhaust manifold and primary catalytic converter are shown below.

• The engine is equipped with a total of eight oxygen sensors.

• To keep the illustration simple, the crankcase and cylinders (number 1 to 12) are only shown in schematic form.

• The oxygen sensors, exhaust manifolds and primary catalytic converter are, however, shown as they are installed in the vehicle.

• Arrow points in direction of travel.





I - Primary catalytic converter for cylinders 1, 2, 3; also referred to as -exhaust bank 1-.

II - Primary catalytic converter for cylinders 4, 5, 6; also referred to as -exhaust bank 2-.

III - Primary catalytic converter for cylinders 7, 8, 9; also referred to as -exhaust bank 3-.

IV - Primary catalytic converter for cylinders 10, 11, 12; also referred to as -exhaust bank 4-.

1.1 - Heated Oxygen Sensor (HO2S) (-G39-) with oxygen sensor heater; before catalytic converter

• Exhaust bank 1 (cylinder 1, 2, 3)

1.2 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (-G130-) with oxygen sensor heater

• Exhaust bank 1 (cylinder 1, 2, 3)

2.1 - Heated Oxygen Sensor (HO2S) 2 (-G108-) with oxygen sensor heater; before catalytic converter

• Exhaust bank 2 (cylinder 4, 5, 6)

2.2 - Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (-G131-) with oxygen sensor heater

• Exhaust bank 2 (cylinder 4, 5, 6)

3.1 - Heated Oxygen Sensor (HO2S) 3 (-G285-) with oxygen sensor heater; before catalytic converter

• Exhaust bank 3 (cylinder 7, 8, 9)

3.2 - Oxygen Sensor (O2S) 3 Behind Three Way Catalytic Converter (TWC) (-G287-) with oxygen sensor heater

• Exhaust bank 3 (cylinder 7, 8, 9)

4.1 - Heated Oxygen Sensor (HO2S) 4 (-G286-) with oxygen sensor heater; before catalytic converter

• Exhaust bank 4 (cylinder 10, 11, 12)

4.2 - Oxygen Sensor (O2S) 4 Behind Three Way Catalytic Converter (TWC) (-G288-) with oxygen sensor heater; after catalytic converter

• Exhaust bank 4 (cylinder 10, 11, 12)

• In the following illustration, the component locations of the knock sensors are only shown in schematic form.

• The knock sensors are located on the outer sides of the crankcase, not in the "V" as e.g. on the bi-turbo engine.

• The engine is equipped with a total of four knock sensors.

• Arrow points in direction of travel.





I - Cylinder bank 1 (cylinders 1 to 6)

II - Cylinder bank 2 (cylinders 7 to 12)

1 - Knock sensor 1 (-G61-)

• Knock sensor 1 detects engine knocks in cylinders 1, 2 and 3.

2 - Knock sensor 2 (-G66-)

• Knock sensor 2 detects engine knocks in cylinders 4, 5 and 6.

3 - Knock sensor 3 (-G198-)

• Knock sensor 3 detects engine knocks in cylinders 7, 8 and 9.

4 - Knock sensor 4 (-G199-)

• Knock sensor 4 detects engine knocks in cylinders 10, 11 and 12.
pro multis · About Operation CHARM