Louise

Hi I purchased a Qashqai 2017 a year ago. It is still under warranty. The red airbag light comes on every time there is a frost. The garage have suggested its because the battery dips in power when there is a frost. Although 4 months ago I had to have a new battery when it was flat. It now needs a mot, obviously it will fail with the light on again. It costs £100 to clear the fault. Any advice greatly appreciated.