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· Aedificantium in viridi Apparatus
9,906 Posts
Normally I'd say not just a flat battery but a knackered battery with a dead cell, Mazda factory batteries are notoriously have a short lifespan + v.cold weather, however, given the relative & unecassary complexity of the ND, it could be down to any number of sensors or other electronic functions built in.
Good luck and keep us informed.
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