VANSSI BAU15s PY21W 7507 21-SMD LED Replacement Bulb for Turn Signal Indicator or Corner Parking Side Marker Lights Amber (Pack of 2) Fit 7507 or PY21W or BAU15s socket for either front or rear turn signal lights Energy-Saving.1/4 power of original halogen bulb.Powered by 21 pieces high power 3535 SAMSUNG SMD LED lights with 10W output.5 times Brighter than origianl halogen bulb. Size:53 x 18 mm;DC12-24V.Non-Polarity Design.Very GOOD Amber Light bulb For Rear or Front Turn Signal Lights Energy-Saving design.1/4 power of original halogen bulb.this item is not CANBUS Model.We can not Guarantee it work without error on all brand vehicles. but still have Certain vehicles may need a resistor module (or decoder) sold separately to prevent "bulb out" messages or to allow the lights to operate correctly. This has to do with the vehicles CANBUS system and is not the fault of the LED bulb. Unfortunately we cannot test every model to state if you need these resistors or not. If you want Load resistors or LED Decoder,please contact us or You can purchase them separately in our store.