I have the same problem. Took the car to the local dealer and he wanted to charge me about $400 for replacing passenger side headlight bulb. Which includes the $158 for the bulb itself and rest for the labor. Which according to me is a bull... but came home and went online and found a pair of headlight for 06 prius for $10.00 (including shipping). Going to post the message once I get them and whether they work or not!!