Intake Manifold: Service and Repair
Ignition System Component Overview
1. Air filter housing
2. Nut 6 Nm
3. Bolt 10 Nm
4 Vacuum pressure connection
to intake manifold
5. Connector, 40-pin
Switch ignition off before disconnecting or connecting connector
disengage to pull off
6. Connector, 81-pin
Switch ignition off before disconnecting or connecting connector
disengage to pull off
7. Motronic Engine Control Module (ECM) -J220-
Component location: in plenum chamber
8. 6-pin harness connector
Black for Heated Oxygen Sensor (HO2S) and oxygen sensor heater -Z19-
At vehicle underside
9. Heated Oxygen Sensor (HO2S) -G39-
50 Nm
With 6-pin connector
Component location: in catalyst, front
Grease only the thread with part "G 052 112 A3" hot bolt paste; grease must not get onto slot on sensor body
Remove and install using oxygen sensor open ring wrench set -3337-
If replaced, erase learned values and adapt ECM to throttle valve control module
Voltage supply of oxygen sensor heater via Fuel Pump (FP) Relay -J17-
10. 4-pin harness connector
black for O2S behind TWC and O2S Heater
At vehicle underside
11. Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- bank 1*, 50 Nm
50 Nm
With 4-pin connector
Location: Behind catalyst
Grease only the thread with part "G 052 112 A3" hot bolt paste; grease must not get onto slot on sensor body
Remove and install using oxygen sensor open ring wrench set -3337-
If replaced, erase learned values and adapt ECM to throttle valve control module
Voltage supply of oxygen sensor heater via Fuel Pump (FP) Relay -J17-
12. Bracket
for recirculating valve for turbocharger
for engine speed sensor
13. Bracket
for engine speed sensor
14. O-ring
Replace if damaged
15. Engine Speed (RPM) Sensor -G28-*
16. 3-pin harness connector
gray
for engine speed sensor
17. Bolt 20 Nm
18. Bolt 45 Nm
19. Support
between intake manifold and engine block
20. Charge Air Pressure Sensor -G31-*
4-pin connector
21. Intake manifold
22. Gasket
Replace
23. from Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-
24. Throttle Valve Control Module -J338-*
If replace match ECM
if replace adapt control module for automatic transmission
25. Return line
- secure with spring type clamps
- Check for secure fitting
- to fuel delivery unit in fuel tank
26. Supply line
- secure with spring type clamps
- from fuel filter
27. Fuel rail with injectors
28. Intake Air Temperature (IAT) Sensor -G42-*
29. to line between turbocharger and charge air cooler
30. to line between turbocharger and charge air cooler
31. To turbocharger
32. from Crankcase Breather
Valve cover
33. from Crankcase Breather
Oil filter bracket
34. Engine Coolant Temperature (ECT) Sensor -G62-*
for ECM
with ECT sensor -G2-
If necessary, release pressure in cooling system before removing
35. Connector
Black, 4-pin
For ECT Sensor
36. Retaining clip
Check for secure fitting
37. to Recirculating valve for turbocharger -N249-
38. to Pressure Unit on Turbocharger
39. Wastegate Bypass Regulator Valve -N75- */**
40. Intake hose
41. Mass Air Flow (MAF) Sensor -G70-*
5-pin connector