I'm pretty much convinced that there is not, has never been, and never will be a car insurance advert that doesn't completely suck. 
Taking elements of commmercials here, how about:
A car crash happens, it is really bad, crumpled metal, but it's done in the style of the Nissan cars that change into robots. The hood of one car pops up and out comes a huge gush of car fluid, like the Lynx guy's armpit. Meanwhile, out from behind the car of the guy who has the insurance being flogged, pops the James Brown look-alike chorus, who are all singing Hallejuah sort of stuff. And then the tag line is, "Aren't
you glad you have Pink Satin Car Insurance?"
That might be kinda cool for a car insurance commercial. :-P