O ring seal (AC system) (2 required per car)

Hydrogenated nitrile butadiene rubber o ring used twice on the air conditioning system - used on the dryer end of the compressor-to-dryer hose, and on the dryer to evaporator core connection. 2 of these are 2 of the 11 o-rings used on the air conditioning system (10 if you don't have the 110527 adapter hub fitted).