Hello, wondering if anyone knows of an LED plug and play replacement kit for Bi Xenon lights in a 2004 9 5 Aero? If anyone here has done so please advise kit fitted.

Drivers side headlight starting to flicker, don't know if it is bulb or ballast or both. Have replaced passenger side previously, very expensive Bi Xenon bulbs. Local auto electrician has advised that both should be replaced at same time. Anyone know if this is correct?