I used to have an 01 BMW 325Ci with xenons and they were so bright that oncoming drivers used to flash me alot - as for the latest models of BMWs with factory installed xenons I don't think they're as bright but if anybody can shed some 'light' on whether BMW have changed or sourced an new xenon bulb distributor i would be interested to know. The E Class Merc xenons are blueish bright. The new 3 series xenons - sometimes I can't tell the difference if they're halogens or xenons.

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'05' X5 3.0i Auto Sport Black/Black Fully loaded