Dont know Im afraid. But it was my passenger headlight that blew also but the drivers side still worked. It knocked out the fuse for the levelling motor as well, so my garage said. The bulb blew again about 4 weeks later but no fuses blown that time. Decided to upgrade and fit more expensive bulbs as they are a pain to replace. so far after 6 months and 5,000 miles of night driving the new bulbs havent blown and I can see where I am going.