After about 30K miles and some really cold days (and weeks) here, in Boston, I've noticed excessive bouncing and low pitch "bang" sound coming from the rear of the VX. I've traveled to Isuzu Fuller in Watertown (Boston) twice with complaints. I have an extended warranty and I've asked "knowlegable" techs from Isuzu to ride in the car and diagnose the problem. My ext. warranty company said they will replace the part (if needed) but I have to pay $75 to Isuzu to diagnose. Well, to make a long story short - Isuzu said - it is supposed to drive like that (yeah, right....) and I went to another shop for checkup. They noticed bang and after removing red rubber boots off our KYB's noticed bluid liaking (small amounts). Outside shocks were dry. After they were replaced (by insurance) my VX rides like new again and I can enjoy it.
I plan to send both schocks to Isuzu USA along with Invoices from Isuzu Fuller and their "expert" opinion tech and ask them where do they train techs if they can not even distinguish leaking shocks ???
I do not think I wanna ever go to Isuzu Service again!