"I had a Holden Cruze here on Saturday and the job came through to me from the AA through Holden NZ. They basically told me exactly what the problem was before I went, so they are fully aware of it. They just requested me to tow the car up the road."
Mr Stark said he normally gets called out once a month to respond to the problem in that area but that "sometimes there can be one or two in a week".
Wagg's Service Manager Gary Bishop said he was called to the area "at least once or twice each week" and that the cause of the interference was a "total mystery".
"We don't really have much more information on it, we're just trying to work out what the hell it is," he said.
"Whether there's a new satellite dish somewhere gone up or one of the shops has something in with their electric doors, we really don't know."
The bizarre phenomenon has occurred throughout the world in recent years, with a commonly identified culprit being wireless devices used by nearby shops. These devices can unintentionally jam the same frequency used by particular key fobs in unlocking cars.
In Masterton, surrounding businesses to the parks, including Bay Audiology and Flight Centre, were asked if they had noticed the problem but all staff said they were unaware of any problem.
Staff from Hannahs Shoes, across the road from the three parks, said the only thing they had noticed was that quite a few car alarms had been going off in that area lately.
This was also noted by staff at Ten O'Clock Cookie Bakery and Paper Plus.
