Remove/install an oxygen sensor - AR14.00-P-5303L

ENGINE 137.970 in MODELS 215.378, 220.178 /878 

Fig 1: Identifying Oxygen Sensor Connectors Remove/Install Components (1 Of 5)

Fig 2: Identifying Oxygen Sensor Connectors Remove/Install Components (2 Of 5)

Fig 3: Identifying Oxygen Sensor Connectors Remove/Install Components (3 Of 5)

Fig 4: Identifying Oxygen Sensor Connectors Remove/Install Components (4 Of 5)

Fig 5: Identifying Oxygen Sensor Connectors Remove/Install Components (5 Of 5)

	Remove/install
	O 2  sensors upstream of TWC:
1	Remove air filter		AR09.10-P-1050L
2	Disconnect connectors for O2 sensors (G3/7x1, G3/8x1) and (G3/9x1, G3/10x1)
3	Remove O2 sensors (G3/8), (G3/9) and (G3/10)	Remove from above.
			*BA14.00-P-1001-01A
			Figure
4	Remove ignition coil module	Only for O2 sensor (G3/7)	AR15.12-P-1100L
5	Remove O2 sensor (G3/7)	Remove from above.
			*BA14.00-P-1001-01A
			Figure
	O 2  sensors downstream of TWC
6	Remove bottom engine compartment panel
7	Disconnect connectors for O2 sensors (G3/11x1, G3/12x1) and (G3/13x1, G3/14x1)
8	Remove O2 sensors (G3/11, G3/12) and (G3/13, G3/14)	Remove from below.
			*BA14.00-P-1001-01A
			Figure
9	Install in the reverse order

O2 SENSOR

Number	Designation		Engines 104, 111, 119, 120, 137, engine 166 in model 168
BA14.00-P-1001-01A	O2 sensor on exhaust pipe/exhaust manifold	Nm	55

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1005-06A	Paste	A 000 989 76 51

Fig 6: Identifying Ring Wrench Socket (000 589 71 03 00)