A8L Quattro Sedan W12-6.0L (BSB) (2005)
‹› Disregard the other items in the illustration.
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Expose electrical wiring to oxygen sensor.
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Remove Heated Oxygen Sensor (HO2S) 4 (G286) - arrow 2 - using ring spanner set (3337).
Installing
Perform installation in the reverse order of removal, noting the following:
‹› Replace O-ring.
‹› New oxygen sensors are coated with assembly paste; the paste must not get into the slots on the oxygen sensor body.
‹› When re-installing a used oxygen sensor, coat the threads with hot bolt paste. This paste must not come into contact with the slots on the oxygen
sensor body.
‹› During installation, all cable ties must be re-installed at the same location.
‹› Wires of oxygen sensors must always be secured in the same position when installing so that contact with the exhaust pipe is avoided.