My wifes prado 120 with the 1kz has had a bad exhaust leak in the cabin once the windows are down you can really notice it. We have changed the 2 rear vents under the rear bar and the rear door seal with brand new genuine items.also tightened the latch on rear door to no avail.and have had exhaust checked for leaks its got me buggered ? Has anyone had this issue before thanks