Catalytic Converter: Service and Repair

Exhaust manifold, front exhaust pipe and catalyst with attachments





Engine Code AEG
1. Combi-valve
2. 10 Nm (7 ft. lbs.)
3. 25 Nm (18 ft. lbs.)
4. 30 Nm (22 ft. lbs.)
5. 25 Nm (18 ft. lbs.)
^ Always replace
6. Connecting pipe
7. Union
^ 35 Nm (26 ft. lbs.)
8. 4-pin harness connector
^ Black
^ For Heated Oxygen Sensor (HO2S) -G39and Oxygen sensor heating
^ Terminals 3 and 4 gold plated
9. Heated Oxygen Sensor (HO2S) -G39- (before catalyst)
^ 50 Nm (37 ft. lbs.)
^ Only coat threads using anti-seize compound not containing silicone and marked "safe for oxygen sensors" (like G 052 112 A3); do not allow compound to enter slots on sensor body
^ Remove and install using ring spanner set 3337
10. Oxygen sensor (H02S) behind three way catalytic converter (TWO) -G130- (after catalyst)
^ 50 Nm (37 ft. lbs.)
^ Only coat threads using anti-seize compound not containing silicone and marked "safe for oxygen sensors"(like G 052 112 A3); do not allow compound to enter slots on sensor body
^ Remove and install using ring spanner set 3337
11. 4-pin harness connector
^ Brown
^ For oxygen sensor (H02S) behind three way catalytic converter (TWC) -G130- and Oxygen sensor heater
^ Terminals 3 and 4 gold
12. To center muffler
13. Front exhaust pipe with catalyst
14. 40 Nm (30 ft. lbs.)
^ Always replace
15. Support
16. Gasket
^ Always replace
17. Exhaust manifold
^ Removing and installing, Refer to Exhaust Manifold, Service and Repair
18. Warm air collector plate





Engine Codes AVH, AZG
1. Combi-valve
2. 10 Nm (7 ft. lbs.)
3. 25 Nm (18 ft. lbs.)
4. 25 Nm (18 ft. lbs.)
^ Always replace
5. Heated oxygen sensor (HO2S) -G39 (before catalyst)
^ 50 Nm (37ft. lbs.)
^ Only coat threads using anti-seize compound not containing silicone and marked "safe for oxygen sensors" (like G 052 112 A3); do not allow compound to enter slots on sensor body
^ Remove and install using ring spanner set 3337
6. 6-pin harness connector
^ Black
^ For heated oxygen sensor (H02S) -G39and Oxygen sensor heating
^ Terminals 3 and 4 gold plated
7. 30 Nm (22 ft. lbs.)
8. Connecting pipe
9. Union
^ 35 Nm (26 ft. lbs.)
10. 25 Nm (18 ft. lbs.)
11. Mounting
12. 4-pin harness connector
^ Brown
^ For oxygen sensor (H02S) behind three way catalytic converter (TWC) -G130- and Oxygen sensor heater
^ Terminals 3 and 4 gold
13. Oxygen sensor (H02S) behind three way catalytic converter (TWC) -G130- (after catalyst)
^ 50 Nm (37 ft. lbs.)
^ Only coat threads using anti-seize compound not containing silicone and marked "safe for oxygen sensors" (like G 052 112 A3); do not allow compound to enter slots on sensor body
^ Remove and install using ring spanner set 3337
^ Checking:
Refer to Powertrain Management
14. To center muffler
15. Front exhaust pipe with catalyst
16. 40 Nm (30 ft. lbs.)
^ Always replace
17. Gasket
^ Always replace
18. Exhaust manifold
19. Gasket
^ Always replace
20. Warm air collector plate