Originally Posted by rogerkiu

Hi all, just bought a pair of Sylvania Silverstar bulbs for my x's front turn signal in headlight. After the purchase, I found that the bulb type was 3357A/3457A ST. I searched in realoem.com, and it shows the bulb type is 3157K. Did I buy the wrong bulb? What is the difference between 3457 bulb and 3157 bulb? They look same. Thanks for help.