It’s a matter of time before the HID bulb on your 2nd Gen Lexus IS350 goes out. Sometimes the failure can be intermittent with it sometimes working and other times not. It can also fail by simply burning out completely. It’s not difficult to replace the HID bulbs on the 2nd Gen Lexus IS350. You just need to make sure you remove a few things in the engine bay that get in the way when replacing the HID bulbs. Removing some of these parts not only provides you with access to the HID bulbs, but it also gives you room to work.