BRAND NEW PHILIPS D4R XenEco HID xenon bulb (OEM part) for vehicles, which came with D4R HID (xenon) system from the factory. These bulbs are new generation of Mercury Free bulbs, which provide clearer night vision, and they are widely used on newer models of Lexus and Toyota vehicles, but not sure which other car manufacturers use this type of xenon bulb.

The part# of the bulbs is '42406' with no box included.
If one side of HID lights went out, we strongly suggest you to replace both sides at the same time because HID bulb colorshifts to become bluer/whiter overtime. Therefore, putting a new bulb one side vs. used bulb on the other side, would give you uneven lighting output and color. 

As many automotive enthusiasts are already aware of, PHILIPS 4300K HID bulb has the best quality in terms of lighting output, life time, and color among many other aftermarket brand bulbs and that is why these bulbs are used by high-end vehicles as dealer's certified parts.

Some sellers advertise these D4R bulbs as 4800K, but actually they are 4300K.

These same bulbs cost over $300 at the dealer

Will fit

06-09 Toyota Prius

08-09 Toyota Avalon

If your car needs a D4R-type bulb, this will work.