The 42-year-old was travelling in the grey-coloured Nissan in the Bay of Plenty and Matamata area days before the vehicle was found.
Police ask anyone who has seen O’Connor or has information about where she may be to contact them via 105, quoting file number 260203/1626.
“We would also like to hear from anybody who was on the Rapurapu track or in that area on Tuesday that may have seen Nicola or any activity that may assist the inquiry to locate her,” Clarke said.
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