Engineering hindsight
I own a Zafira. It has been back to the main dealer twice to fix a wiring loom problem that turns it into a mobile inferno if you use the heater. It is about to have this fault "fixed" for the third time. (This is not peculiar to my Zafira, they have all been recalled three times. All means all the affected models, some Zafiras are not mobile incinerators.)
Vauxhall have been recalling other models for similar problems this year.
Other car manufacturers are available and are equally bad.