The quad was stolen from North Fallaknowe Farm, Coldingham between 2.30 pm and 7.45 pm on Monday, May 16.
It has the registration SN12 DZO and is valued at £6,000. It was secured and was possibly removed in another vehicle. The farm is undergoing building works and a van would not have looked out of place.
Officers ask anyone who can assist them in their inquiries to please get in touch.
PC Kirsty Nash of Eyemouth Police Station said: “I am keen to hear from anyone who was on the A1107, the Moors Road around this time.
“I’d also be keen to hear from anyone who has been offered this vehicle for sale.”
Anyone with information can contact officers on 101 or anonymously via Crimestoppers on 0800 555 111.