LED bulbs may cause some newer vehicles to indicate a bulb is burnt out (because of their low power consumption, car computer misjudge the bulb is burnt). Some cars indicate this by increasing the flash rate of the turn signals, some turn on a bad bulb indicator. The only fix for this is to install Load Resistors across the bulbs that are being indicated as bad. Some vehicles will also disable the cruise control system if a brake light bulb is being indicated as bad, the installation of Load Resistors will also solve this problem. Currently we provides 2 versions in 50W 6OHM and 25W 10OHM respectively, both are most popular used in the market, also please be informed this is not produced by ourselves, users have to know which version fit your car by yourselves.