Coolant expansion tank cap - Porsche 911 type 996 / 997, Boxster / Cayman type 986 / 987
Porsche
Genuine Porsche coolant expansion cap, the most up to date unit which ends in "04". We recommend automatic replacement on all models equipped with the coolant caps ending in "00" or "01." Units ending in 00 will typically leak excessively to the point of visual coolant pooling. Units ending in 01 often let off pressure resulting in slow coolant loss, but not to the extent of visual coolant pooling. Other units ending in 02 or 03 should periodically be inspected and tested but are not as commonly 'bad' as the earlier versions.
Fits the following vehicles:
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911 C2, C4, GT2, GT3 and Turbo type 996, 1999-2005
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911 C2, C4, GT2, GT3 and Turbo type 997, 2006-2012
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Boxster type 986, 1997-2005
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Boxster / Cayman type 987, 2006-2012*
*Boxster and Cayman type 987 models have two coolant caps. The service cap is a non-pressurized unit while this cap is tucked away in the engine bay, and is not immediately obvious when it begins to give problems.
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