S4 Quattro Wagon V8-4.2L (BHF) (2008)
‹› Illustration shows engine/transmission assembly removed.
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Remove Heated Oxygen Sensor (HO2S) - 2 - using special tool (3337).
Installing
Install in reverse order, paying attention to the following:
‹› Thread of new Heated Oxygen Sensor (HO2S) is coated with assembly paste which must not be allowed to go into openings in probe.
‹› Re-attach all cable ties at same location on installation.
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Install subframe.
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Perform stress-free alignment of exhaust system.
Tightening Specifications
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If a Heated Oxygen Sensor (HO2S) is to be re-used, grease thread only with hot bolt paste. This must not be allowed to go into openings in probe.