Triple 4 original equipment water pump / power steering pump housing to engine block o-ring seal to fit all Discovery 2  TD5 models. 

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This o-ring seals the coolant outlet from the engine block to the water pump housing.

This is a premium original equipment quality part. The o-ring has the correct grooved profile on both the inner and outer seal faces, unlike the cheap versions that are just a plain o-ring.

Related part number ERR6711