all the KA problems; 240, axxess, multi, altima were a simple fix - and many were no problem anyway. There have been lots of T-chain engines that are problem free, just seem that this new(ish) 4.0L has some teething pain. The QG, QR, VQ35, 45, VK, MR etc all have had no issues. No doubt it sucks to have any issues, but when you really look at it, if you had a t-belt, you could have to replace it too. When the VG's (that everyone raves about) came out, they had TONS of issues too.