Front oxygen sensor, B235E/R
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Front oxygen sensor, B235E/R
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Important
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The cables must not be twisted. Twisted cables exposed to vibration can break.
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The oxygen sensor is sensitive to impact and jolting and must be handled with care.
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1.
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Remove the engine cover.
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2.
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Remove the oxygen sensor connector from the holder by pressing the lugs together as shown in the illustration.
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3.
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Remove the bypass pipe and heat shield.
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4.
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Uncut the cable tie to the oxygen sensor and draw out the cables.
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5.
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Remove the oxygen sensor from the turbo outlet pipe.
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Important
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The oxygen sensor is sensitive to impact and jolting and must be handled with care. It is important that the connections between the oxygen sensor and nipple are gas-tight.
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1.
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Coat the oxygen sensor threads with Molycote 1000 (30 20 971) to prevent binding.
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2.
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Fit the oxygen sensor.
Tightening torque 55 Nm (41 lbf ft)
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Important
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Chemicals such as contact spray and grease must not come into contact with the oxygen sensor connectors.
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3.
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Draw out the cable and plug in the connector.
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4.
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Fasten the cable to the water pipe with a cable tie.
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5.
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Fit the heat shield and bypass pipe.
Tightening torque, nut, heat shield 20 Nm (15 lbf ft)
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6.
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Fit the upper engine cover.
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