VW Passat & Audi A4 1990-2000

Audi A4 1.8L


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Fig. Audi A4 1.8L Component Locations

Note the following:

Data Link Connector (DLC), located under knee bar, left side of steering wheel
Fuel pump relay, position 6 on relay panel in driver's side footwell
Oxygen sensor (O2S) behind 3-way catalytic converter with Oxygen sensor (O2S) heater
EVAP system Leak Detection Pump (LDP) (V144) in left rear wheelhousing behind splash shield

Key List for gnam 93224aug61:

1. Heated Oxygen sensor (HO2S) (G39) with Oxygen sensor (O2S) heater (Z19)

2. Engine Coolant Temperature (ECT) sensor (G62)

3. Harness connector for Heated Oxygen sensor (G39) and Oxygen sensor heater (Z19) (4-pin, brown), Oxygen sensor (O2S) behind 3-way catalytic converter with Oxygen sensor heater (Z29) (4-pin, black), engine speed sensor (G28) (3-pin, gray), knock sensor 1 (G61) (3-pin, green) and knock sensor 2 (G66) (3-pin, blue)

4. Electronics box with Motronic Engine Control Module (ECM) (J220) and Barometric Pressure (BARO) sensor (F96)

5. EVAP canister purge regulator valve (N80)

6. Power output stage (N122) includes 5-pin connector for signal wiring from ECM and 4-pin connector for coil primary circuit connections

7. Mass Airflow (MAF) sensor (G70) in upper air cleaner housing

8. Wastegate bypass regulator valve (N75)

9. Ignition coils

10. Fuel injectors

11. Camshaft Position (CMP) sensor (G40)

12. knock sensor 1 (G61)

13. knock sensor 2 (G66)

14. Engine speed sensor (G28), behind oil filter housing on engine cylinder block

15. Intake Air Temperature (IAT) sensor (G42)

16. Throttle valve control module (J338), includes throttle drive (G186), angle sensor 1 for throttle drive (G187), TP sensor (G69), CTP switch (F60)