The LED light bulbs are compatible with most vehicles, however, for a few latest vehicles, especially for some US vehicles like Dodge/Jeep/Chrysler, you may meet the compatibility issue, and the load resistors are needed.
Our customer Joe installed 9012 bulbs on his 2015 Chrysler 200, he told us the bulbs only stayed on for less than a minute and shut off, so we sent the load resistors to him, then problem solved, the bulbs worked great after put the resistors on.
The image of the load resistor:
The 9012 bulb Joe purchased is our LA series, if you buy the same series and meet the same issue, then you will need the load resistor. Or click here to choose our another series, LS series, which comes with 90W per set, this bulb can work well without the load resistor.