1、Replace Part: The OE number is 63117237647, replacement for 1 Series F20/F21 2010‑2015, replacement for 5 Series F10/F11, etc. 2、Excellent Function: Low‑current quick start, the xenon ballast can effectively improve the distance and range of your headlight. 3、Cold Start Current: Not overshoot, and the lamp could accelerate without high power, greatly prolong the lamp lifespan. 4、Electronic Ignition Technology: Stable in high‑voltage output, less interference, strobe up to 10 million times without damage. 5、Pin‑in Design: Make use of imported ballast pin‑in design, the headlamp control module is compatible with ultra‑fast start ballasts. Item Type: Xenon Ballast Material: Alloy OE: 63117237647 Fitment: Replacement for 1 Series F20 (07/2010-02/2015) Replacement for 1 Series F21 (07/2010-02/2015) Replacement for 3 Series E90 LCI (07/2007-12/2011) Replacement for 3 Series E91 LCI (07/2007-05/2012) Replacement for 5 Series F10 (01/2009-10/2016) Replacement for 5 Series F11 (01/2009-06/2013) Replacement for 7 Series F01 (06/2007 -6/2012) Replacement for 7 Series F02 (07/2007-06/2012) Replacement for 7 Series F03 (04/2008-05/2012) Replacement for 7 Series F04 Hybrid (10/2008-06/2012) Replacement for X1 E84 (09/2008-06/2015) Replacement for Z4 E89 (01/2008-08/2016) Replacement for Ghost RR4 (08/2008-11/2019) Replacement for K48 (K 1600 GT, K 1600 GTL) (01/2010-12/2019) Replacement for K61 (K 1600 Bagger) (01/2017-12/2019) 1 x Xenon Ballast