I've been reading many many reports on various forums regarding vibration on the Avensis. Some seem to say it happens on acceleration, some say on motorway driving, but all seem to imply it happens within certain rev bands. The advice given is usually wheels, discs, or drive shaft issues. But have these vibration victims ever started their cars, firmly engaged the handbrake, gear in neutral and revved the engine to near the upper rev limit? I have and guess what? The vibration is slightly felt around 2000 revs, gets noticeable at 3000 revs and slightly disappears at around 4500 revs. I must admit that the vibration seems worse when actually driving the car, but the vibration can be felt when stationary, thus must be engine related. I took my car to 2 private garages and a Toyota dealer. The private garages told me it was engine resonance and tightened every nut they could find, especially the engine mounts. Very, very slight improvement. They recommended replacing the engine mounts one by one till the culprit/culprits were found, but the cost of the mounts was somewhat excessive just to play about with so I took it to aToyota dealer. They told me that this problem is usually the inlet manifold and recommended replacing it - which they did. And guess what? Absolutely no difference. So I've got a nice new inlet manifold but the same old really annoying problem. Could it really be an/a few engine mounts? I've been told they are expensive because they are not just good old metal/rubber/metal mounts but oil-filled shock absorber type mounts! Seems the more complicated the vehicle.....I'll let you finish that sentence. Could it be the variable valve technology throwing the engine out of balance at certain revs? Could it be the flywheel going adrift? Why doesn't Toyota admit there is a problem? Why can't they solve it?

I'm not the only one with this problem and from the various forums it's a pretty common issue. Any thoughts on the matter would be really welcome.