Audi A4 Owners & Service Manuals

Audi A4: Injection System

Component Location Overview - Injection System

Component Location Overview - Engine Compartment

Component Location Overview - Engine Compartment

1 - Oxygen Sensor after Catalytic Converter -G130- with Heater for Oxygen Sensor 1 after Catalytic Converter -Z29-

  • Component location. Refer to → Fig. "Component Location Oxygen Sensor after Catalytic Converter -G130- with Heater for Oxygen Sensor 1 after Catalytic Converter -Z29- ".

2 - Coolant Shut-Off Valve -N82-

  • Equipment version with parking heater Heater Coolant Shut-Off Valve -N279-

3 - Gear Recognition Sensor -G604-

  • Equipment version with manual transmission
  • Component location. Refer to → Fig. " Gear Recognition Sensor -G604- Component Location".

4 - Brake Booster Pressure Sensor -G294-

5 - Accelerator Pedal Position Sensor -G79-/Accelerator Pedal Position Sensor 2 -G185-

  • Component location. Refer to → Fig. " Accelerator Pedal Position Sensor -G79-/Accelerator Pedal Position Sensor 2 -G185- ".

6 - Brake Lamp Switch -F-

  • Component location. Refer to → Fig. " Brake Lamp Switch -F- Component Location".

7 - Coolant Recirculation Pump -V50-, After-Run Coolant Pump -V51-

  • Overview. Refer to → Chapter "Overview - Electric Coolant Pump".

8 - Clutch Position Sensor -G476-

  • With Clutch Pedal Switch -F36-/Clutch Pedal Starter Interlock Switch -F194-
  • Equipment version with manual transmission
  • Component location. Refer to → Fig. "Component Location - Clutch Position Sensor -G476- ".

9 - Engine Control Module -J623-

  • Overview. Refer to → Chapter "Overview - Engine Control Module".

10 - Engine Coolant Temperature Sensor on Radiator Outlet -G83-

  • Component location. Refer to → Fig. "Component Location - Engine Coolant Temperature Sensor on Radiator Outlet -G83- ".

11 - Charge Air Pressure Sensor -G31-

  • Overview. Refer to → Chapter "Overview - Charge Air System".

12 - Right Electrohydraulic Engine Mount Solenoid Valve -N145-

  • For versions with dual-clutch transmission
  • Component location. Refer to → Fig. "Left/Right Electrohydraulic Engine Mount Solenoid Valve -N144-/-N145- Component Location".

13 - Left Electrohydraulic Engine Mount Solenoid Valve -N144-

  • For versions with dual-clutch transmission
  • Component location. Refer to → Fig. "Left/Right Electrohydraulic Engine Mount Solenoid Valve -N144-/-N145- Component Location".

14 - Heated Oxygen Sensor -G39- with Oxygen Sensor Heater -Z19-

  • Overview. Refer to → Servicing - 4-cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Heated Oxygen Sensor; Overview - Heated Oxygen Sensor.

15 - Mass Airflow Sensor -G70-

  • Overview. Refer to → Chapter "Overview - Air Filter Housing".

Accelerator Pedal Position Sensor -G79-/Accelerator Pedal Position Sensor 2 -G185-

  • Integrated in the accelerator pedal module -3-. Faulty accelerator pedal position sensors cannot be replaced separately.

Overview. Refer to → Fuel Supply System; Rep. Gr.20; Accelerator Pedal Mechanism; Overview - Accelerator Pedal Module.

A20-11427

Brake Lamp Switch -F- Component Location

  • In the engine compartment on the brake master cylinder.

  1 - Brake Lamp Switch -F- Connector

Overview. Refer to → Brake System; Rep. Gr.47; Brake Booster/Brake Master Cylinder; Overview - Brake Booster/Brake Master Cylinder.

A45-10255

Component Location - Clutch Position Sensor -G476-

  • Integrated in the clutch master cylinder in the driver side plenum chamber. Cannot be replaced separately if faulty.

  5 - Clutch Position Sensor -G476- connector

Overview. Refer to → Transmission; Rep. Gr.30; Clutch Mechanism; Overview - Pedal Assembly.

A30-10165

Gear Recognition Sensor -G604- Component Location

  • Upper right on the manual transmission.

  1 - Gear Recognition Sensor -G604-

Removing and installing. Refer to → Transmission; Rep. Gr.34; Selector Mechanism; Gear Recognition SensorG604, removing and installing.

A34-11080

Component Location - Engine Coolant Temperature Sensor on Radiator Outlet -G83-

  • In the coolant connection on the lower left of the radiator

  2 - Engine Coolant Temperature Sensor on Radiator Outlet -G83- Connector

Overview. Refer to → Chapter "Overview - Engine Coolant Temperature Sensor".

A19-12334

Component Location Oxygen Sensor after Catalytic Converter -G130- with Heater for Oxygen Sensor 1 after Catalytic Converter -Z29-

  • In the catalytic converter.

  1 - Connector for Oxygen Sensor after Catalytic Converter -G130- with Heater for Oxygen Sensor 1 after Catalytic Converter -Z29-

  2 - Oxygen Sensor after Catalytic Converter -G130- with Heater for Oxygen Sensor 1 after Catalytic Converter -Z29-

Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Heated Oxygen Sensor; Overview - Heated Oxygen Sensor.

A24-11553

Left/Right Electrohydraulic Engine Mount Solenoid Valve -N144-/-N145- Component Location

  • Integrated in the engine mount. Cannot be replaced separately if faulty.

Arrow - Left Electrohydraulic Engine Mount Solenoid Valve -N144- Connector

Removing and installing. Refer to → Chapter "Engine Mount, Removing and Installing".

A10-12011

Component Location Overview - Top of Engine

Component Location Overview - Top of Engine

1 - Ignition Coil 1 with Power Output Stage -N70-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.28; Ignition System; Overview - Ignition System.

2 - Ignition Coil 2 with Power Output Stage -N127-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.28; Ignition System; Overview - Ignition System.

3 - Ignition Coil 3 with Power Output Stage -N291-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.28; Ignition System; Overview - Ignition System.

4 - Ignition Coil 4 with Power Output Stage -N292-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.28; Ignition System; Overview - Ignition System.

5 - Camshaft Position Sensor 3 -G300-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.28; Ignition System; Overview - Ignition System.

6 - Fuel Metering Valve -N290-

7 - Cylinder 4 Fuel Injector 2 -N535- MPI

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Fuel Injectors; Overview - Fuel Rail with Fuel Injectors.

8 - Cylinder 3 Fuel Injector 2 -N534- MPI

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Fuel Injectors; Overview - Fuel Rail with Fuel Injectors.

9 - Low Fuel Pressure Sensor -G410- MPI

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.28; Ignition System; Overview - Ignition System.

10 - Intake Air Temperature Sensor -G42-/Manifold Absolute Pressure Sensor -G71-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Intake Manifold; Overview - Intake Manifold.

11 - Cylinder 2 Fuel Injector 2 -N533- MPI

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Fuel Injectors; Overview - Fuel Rail with Fuel Injectors.

12 - Cylinder 1 Fuel Injector 2 -N532- MPI

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Fuel Injectors; Overview - Fuel Rail with Fuel Injectors.

13 - Intake Manifold Runner Position Sensor -G336-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Intake Manifold; Overview - Intake Manifold.

14 - EVAP Canister Purge Regulator Valve 1 -N80-

Component Location Overview - Engine Intake Side

Component Location Overview - Engine Intake Side

1 - Oil Level Thermal Sensor -G266-

  • Overview. Refer to → Chapter "Overview - Oil Pan/Oil Pump".

2 - Engine Temperature Control Actuator -N493-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.19; Coolant Pump/Coolant Regulation; Overview - Coolant Pump/Coolant Regulation.

3 - Cylinder 2 Fuel Injector -N31- FSI

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Fuel Injectors; Overview - Fuel Rail with Fuel Injectors.

4 - Cylinder 1 Fuel Injector -N30- FSI

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Fuel Injectors; Overview - Fuel Rail with Fuel Injectors.

5 - Fuel Pressure Sensor -G247-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Fuel Injectors; Overview - Fuel Rail with Fuel Injectors.

6 - Throttle Valve Control Module -J338-

  • With
  • EPC Throttle Drive -G186-
  • EPC Throttle Drive Angle Sensor 1 -G187-
  • EPC Throttle Drive Angle Sensor 2 -G188-
  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Intake Manifold; Overview - Intake Manifold.

7 - Cam Adjustment Actuator 1 -F366- (for Cylinder 1)

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.15; Valvetrain; Overview - Valvetrain.

8 - Cam Adjustment Actuator 2 -F367- (for Cylinder 1)

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.15; Valvetrain; Overview - Valvetrain.

9 - Cam Adjustment Actuator 3 -F368- (for Cylinder 2)

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.15; Valvetrain; Overview - Valvetrain.

10 - Cam Adjustment Actuator 4 -F369- (for Cylinder 2)

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.15; Valvetrain; Overview - Valvetrain.

11 - Cam Adjustment Actuator 5 -F370- (for Cylinder 3)

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.15; Valvetrain; Overview - Valvetrain.

12 - Cam Adjustment Actuator 6 -F371- (for Cylinder 3)

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.15; Valvetrain; Overview - Valvetrain.

13 - Cam Adjustment Actuator 7 -F372- (for Cylinder 4)

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.15; Valvetrain; Overview - Valvetrain.

14 - Cam Adjustment Actuator 8 -F373- (for Cylinder 4)

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.15; Valvetrain; Overview - Valvetrain.

15 - Camshaft Position Sensor -G40-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.28; Ignition System; Overview - Ignition System.

16 - Intake Manifold Runner Control Valve -N316-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Intake Manifold; Overview - Intake Manifold.

17 - Cylinder 4 Fuel Injector -N33- FSI

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Fuel Injectors; Overview - Fuel Rail with Fuel Injectors.

18 - Cylinder 3 Fuel Injector -N32- FSI

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Fuel Injectors; Overview - Fuel Rail with Fuel Injectors.

19 - Oil Pressure Switch, Level 3 -F447-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.17; Oil Filter/Oil Pressure Switch; Overview - Oil Pressure Switch/Oil Pressure Regulation.

20 - Engine Speed Sensor -G28-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.28; Ignition System; Overview - Ignition System.

21 - Knock Sensor 1 -G61-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.28; Ignition System; Overview - Ignition System.

Component Location Overview - Engine Exhaust Side

Component Location Overview - Engine Exhaust Side

1 - Engine Coolant Temperature Sensor -G62-

  • Overview. Refer to → Chapter "Overview - Coolant Pump/Coolant Thermostat".

2 - Charge Air Pressure Actuator -V465- with Charge Air Pressure Actuator Position Sensor -G581-

3 - Turbocharger Recirculation Valve -N249-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.21; Turbocharger; Overview - Turbocharger.

Component Location Overview - Engine Front

Component Location Overview - Engine Front

1 - Exhaust Camshaft Adjustment Valve 1 -N318-

  • Overview. Refer to → Chapter "Overview - Timing Chain Cover".

2 - Camshaft Adjustment Valve 1 -N205-

  • Overview. Refer to → Chapter "Overview - Timing Chain Cover".

3 - Oil Pressure Switch -F22-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.17; Oil Filter/Oil Pressure Switch; Overview - Oil Pressure Switch/Oil Pressure Regulation.

4 - Reduced Oil Pressure Switch -F378-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.17; Oil Filter/Oil Pressure Switch; Overview - Oil Pressure Switch/Oil Pressure Regulation.

5 - Piston Cooling Nozzle Control Valve -N522-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.17; Oil Filter/Oil Pressure Switch; Overview - Oil Pressure Switch/Oil Pressure Regulation.

6 - Oil Pressure Regulation Valve -N428-

  • Overview. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.17; Oil Filter/Oil Pressure Switch; Overview - Oil Pressure Switch/Oil Pressure Regulation.

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