Wasn't this also the case with the Camry/Avalon? But Toyota said:Thus far, the Civic floor pan and rear suspension have never been designed to accommodate all-wheel-drive. (And yes, a CR-V started out as a Civic, but it's not the same underneath.) The current Accord is the same situation. There's nowhere for a drive shaft to be routed through, and there's nowhere allocated for half-shafts or final drive in the rear suspension module. They've opted for having more passenger and cargo space instead - by not having to protect space for the all-wheel-drive components.