Police have confirmed the body of a woman found in a crashed Audi off State Highway 2 is that of missing Waihi Beach woman Kelly Ann Sinclair.

Police identified the body of the 25-year-old last night after the wreckage of her vehicle was towed from a paddock in Whakamarama yesterday afternoon.

Kelly Ann Sinclair.

Kelly was reported missing by family on Tuesday after last being seen leaving a friend's house in Katikati on Sunday, April 6.

Police say she was heading to a friend's place in Mount Maunganui but never arrived.

Kelly's blue 1997 Audi A3 was found in a paddock about midday yesterday.

Western Bay of Plenty Area Commander Inspector Clifford Paxton told SunLive initial indications are the car was travelling north when it crossed the centreline on a left hand bend and crashed off SH2.

A family friend describes Kelly as a hard-working woman who had a close relationship with her mother.

She had just moved back to Waihi Beach before Christmas after living in Auckland for a number of years.

Kelly worked at The Porch in Waihi Beach and attended Katikati College as a teen.

She was a member of the Katikati gym Katifit and was a bodybuilder.

On one of her Facebook pages, Kelly describes herself as having a sports upbringing and being a natural born competitor.

She was the BABBA WFF Pan Pacific Novice Figure runner-up in 2012.

The serious crash investigation unit is looking into the crash and police are keen to hear from anyone who saw the Blue 1997 Audi A3 late Sunday night and Wednesday.

Anyone with information is asked to contact Tauranga Police on 07 577 4300.