My right daytime running lamp hasn't worked in years and I haven't replaced it because you have to replace the entire assembly (per Mazda). I recently found them on rock auto and they're cheap so I'm finally doing it. The question is... are the originals halogen or xenon? My options are halogen $173 each and xenon is $451. I'm guessing xenon because they're $2000 through Mazda. And are they interchangeable?