Whendisassemblingthecaroxygensensor,thefuelsystemofthecarshouldbeopenedfirstandthepressureinthefuelsystemshouldbereducedtozero.Thenfindtheoxygensensorfromtheintakepipeofthecar,unscrewthetwofixingscrewswithascrewdriver.Takethebottleoutoftheintakepipebyhand,andthenmaketheconnectioncableonthebottle'smouth,andpullitofftodisconnectthepowersupply.Finally,findtheoxygensensorfromtheexhaustpipeofthecar,andunscrewthetwofixingscrewswithascrewdriver,andthendrawtheoxygensensoroutoftheexhaustpipe.