I just installed those 18w Malibu bulbs today. Like, an hour ago! So I don't have any long-term experience yet.

If my VX explodes because of the higher-wattage lights, I'll be sure to post in here. But everyone ELSE who did this says there are no problems.

Oh, and I checked the brightness after installing just one 18w bulb (leaving the stock 3w bulb on the passenger side) and MAN there's a huge difference! I wonder why Isuzu went with a 3w bulb in the first place?!?