To the best of my knowledge the Venza issues are more trim/options related, ie. wind noise etc. than actual power train.

The Rav4 is available with the same v6 as the Venza. The Venza truly is a Camry wagon on steroids, it is built on the same platform as the Camry from which the Rav4 is also derived.

Funny how Ford has some issues yet their Mazda counterparts rate well, might have something to do with the clientel buying them as many Fords are the same vehicle.