Partsam 2 PCS 3157 Switchback Front Turn Signal Light 4057 3156 P27W Dual Color Amber White High Power Led Compatible with 2003-2015 FORD Explorer Cross Part Number: 3157 3157A 3057 3155 3157NA 3357 3457 3457A 4057 4114 4157 etc. These will only work for dual function lights that have both the parking/city light and turn signal function in one bulb. Socket CK or StandardIf you are not sure your socket type ck or standard, please use the keyword (CK or Standard Test) on youtube,the video will show you how to test the socket.( please check before placing an order, Our bulbs come with Standard Base, NOT CK Type, put standard bulbs into CK type sockets, the bulb will work improperly and may POP THE FUSE.-- Most TOYOTA vehicle use CK. IMPORTANT NOTICE: (1)Don't forget Risistors if flashingBlinking or Code error problems occurrs. Please buy resistors in Partsam store by searching ASIN" B01N5OQXUN " if needed. (2)If you bulb does not light or occurrs blinker, please check if your relay is broken and whether your socket is senescent or not.(3) For 7443 and 3157,please raise the pin when installing the bulbs if your bulb does not light or occurrs blinker. Please check your vehicles owners manual or the original bulb to confirm the bulb size before placing an order. The lamp compatibility guides available online and Amazon filter system not accurate all the time. Notes: Load resistors may be needed for some cars (for the new model without turn signal relay) in case of circuit board damage. <span class="a-text-bold">Partsam</span>is one of the largest automotive aftermarket LED lights providers in North America. Customers speak highly of our LED SMD/Cree/Epistar lights thanks to our continuous efforts. In the past years, we were devoted to improving our marker quality, expanding our marker types, adopting the latest technology, delivering the best LED lights for our customers and making them enjoy the best ever shopping experience. Partsam offers an extensive line of high quality lights for car, truck, trailer, boat, bus, lorry, van, caravan, camper, RV, etc. You can find all the position lights and accessories you need in Partsam!