Make sure you buy for Cooper only lights with BA15S type of base. Usually you can’t install non original fog lights in 1.4 motor cars made by MINI. In all 2004 models having 1ND motor company installed unusual shape of fog-light. If you want to change whole lamp in Cooper 1.6 of 2009 production year, look at optimal dimensions. You shouldn’t buy other voltage than 12 V and make sure the power of bulb is 21 W. The for lights in MINI Cooper are important part of optical devices. Recommended and only possible type for MINI vehicles is H11.
Lots of drivers believe that it’s only H11 type of bulb which is important for 2003 year cars, but it’s wrong. So, in output you can get more than 21 W of power but keeping the base at BA15S. Other voltage than 12 V may tone the reflecting plates of Cooper fog-light. You may find lots and lots of bulbs for MINI Cooper to choose from.
When buying fog bulbs for MINI Cooper 2.0 make sure you purchase high quality products. Note that BA15S base lamps might have real output at more than 21 W. Cooper has quite soft terminal with H11 type. Any fog optical device in MINI of voltage 12 V needs to be installed carefully.