Rated 1 out of 5 by Chowhall Not good for BMW!
I tried saving some money buying a non-BMW part,($100 bulb should be good) but to my surprise this bulb didn't work. Actually, it made all the lighting go crazy. Now I paid $100 on top of the dealer price :(.
December 15, 2015
Rated 4 out of 5 by phillywrench Easy to install
A bit pricy since it is a high-intensity bulb but was easy to install. Just be careful not to touch the glass-portion of the bulb - handle it by the base.
October 26, 2015
Rated 5 out of 5 by Verified Reviewer Good product, relatively easy to install
Installed both bulbs two weeks ago, and they are still working fine. Relatively easy to install on the ML550, because only have to remove cover inside engine compartment, remove socket/bulb assembly, unplug the cable, change the mounting ring over to new bulb, connect cable, and reinstall socket and cover. Took about 15 minutes total, because I disconnected the car's battery for safety.
May 10, 2015
Rated 4 out of 5 by tomjay fit car good
good fit for car price not so good
December 30, 2014
Rated 5 out of 5 by PDQcaddy Genuine OEM replacement for HID lamp
I price shopped around for these expensive HID lamps . There were some providers that were much lower in price , but I am aware that there are counterfeit lamps out there. I trusted Pepboys to have genuine article . They had a 30% off promo code for on line orders. That helped a lot and the shipping was free .
Upon receiving the lamps , I inspected the box and it had the holographic seal and the lamps had unique serial numbers. The fit and finish of the lamp was nearly identical to my originals . I am confident these were not fakes.
Don't forget to leave these lamps on for at least 20 minutes the First time you turn them on, so they can "burn in" . And you get maximum life from them. My originals lasted 9 year / 107k miles .
December 30, 2014
Rated 5 out of 5 by EeSs Works great!
Replaced a pair of D1S bulbs on a BMW 335i.
(the originals on the car were German OSRAMs, 4300k)
A few notes:
Don't wait for the light to go pink before changing the bulbs. Xenon HID bulbs have a service life of ~2000-3000 hrs, but reach about 75% brightness level at about 1500 hrs. Provided you drive your car for 1 hour a night on average, your cars headlights could be at 60 or 50% brightness when the vehicle is 5 years old! At the end of the service life of an HID bulb, its brightness can be lower than that of a halogen one.
Look at lumens AND color temperature. Many people assume that a higher color temperature (say, 6000k) denotes greater brightness, when in actuality, it just indicates a shift in color distribution. Xenon HID bulbs have the brightest output at 4300k, falling as color temperature rises. I recommend keeping between 4300 and 5000k. Note, the higher the color temperature, the shorter the wavelength of the light and the greater light dispersion (read: blinding other drivers).
Buy OEM bulbs with thoriated tungsten electrodes for greater stability and consistency in light output.
When first installing the bulbs, there may be a yellow tinge. Do not be alarmed. Through the first 100 hours, the electrodes wear in, the color temperature shifts to a more natural 4300k, and the brightness increases somewhat.
December 27, 2014