Kal-El Posted March 9, 2015 Share Posted March 9, 2015 I'm want to buy some replacement LED bulbs and wondered if I need P21W or PY21W sized bulbs. And what is the difference anyway?ThanksP Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted March 9, 2015 Member Share Posted March 9, 2015 Different locating protrusions on the base and different colour. It's something to do with new diferences between front and rear indicators.http://www.ampoule-phare-voiture.fr/images/produit/ampoules_par_modeles/base/58065.jpgJonathan Link to comment Share on other sites More sharing options...
AntonyH Posted March 9, 2015 Share Posted March 9, 2015 I thought the code related solely to the pin arrangement - pretty sure you can get either type in either colour, can't you? (clear / orange / silvered).P21W have the bayonet pins 180 degrees apart, PY21W have them at a 120 degree offset.Your car may vary but on mine, front and rear were both P21W. Take them out and check... Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted March 9, 2015 Member Share Posted March 9, 2015 You may be right about the independence of the base design and the colour: I can't find a definitive guide, or an explanation.I don't know of any Caterham factory indicator mounts that aren't the same (traditional, 180° spacing) front and back. But could someone have a look at some recent cars, and then there are modified mounts available...Jonathan Link to comment Share on other sites More sharing options...
Kal-El Posted March 9, 2015 Author Share Posted March 9, 2015 Thanks guys that's great. Even the sales people at Auto Bulbs Direct clearly don't know! They told me it was just the colour, which is odd because they offer both types in all colours.P Link to comment Share on other sites More sharing options...
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