While we cannot confirm every year, make and model, we’ve put together a list of vehicles we’ve done extensive testing in our offline shop and can confirm the vehicles do require CK specific bulbs when converting to LED.
| Make/Model/Year | Position |
| Acura MDX 2004 | Front Turn Signal Light |
| Acura TL 2012-2014 | Front Turn Signal Light |
| Acura ZDX 2010-2012 | Front Turn Signal Light |
| Chevy Colorado 2015-2022 | Front Turn Signal Light |
| Chevy Cruze 2016-2018 | Front Turn Signal Light |
| Chevy Equinox 2013-2018 | Front Turn Signal Light |
| Chevy Impala 2014-2017 | Front Turn Signal Light |
| Chevy Silverado Custom 2019-2022 | Front Turn Signal Light |
| Chevy Silverado 2500 2020-2021 | Front Turn Signal Light |
| Chevy Silverado 3500 2020-2021 | Front Turn Signal Light |
| Chevy Spark 2017 | Front Turn Signal Light |
| Ford Expedition 2018-2019 | Front Turn Signal Light |
| GMC Canyon 2016-2022 | Front Turn Signal Light |
| GMC Terrain 2010-2013 | Front Turn Signal Light |
| Honda Accord Coupe 2013-2015 | Front Turn Signal Light |
| Honda Civic Coupe 2006~2010 | Front Turn Signal Light |
| Honda Pilot 2009-2014 | Front Turn Signal Light |
| Honda Odyssey 2011-2015 | Front Turn Signal Light |
| Honda Ridgeline 2006-2014 | Front Turn Signal Light |
| Jeep Gladiator 2020-2021 | Front Turn Signal Light |
| Jeep Wrangler 2018-2021 | Front Turn Signal Light |
| Land Rover Discovery 2018 | Front Turn Signal Light |
| Nissan Maxima 2009-2014 | Front Turn Signal Light |
| Nissan Pathfinder 2005 | Front Turn Signal Light |
| Nissan Xterra 2005-2015 | Front Turn Signal Light |
| Ram 1500 2019-2022 | Front Turn Signal Light |
| Ram 2500 2019-2022 | Front Turn Signal Light |
| Ram 3500 2019-2022 | Front Turn Signal Light |
| Subaru Legacy 2005-2006 | Front Turn Signal Light |
| Toyota Avalon 1998 | Front Turn Signal Light |
| Toyota Avalon 2005-2012 | Front Turn Signal Light |
| Toyota Corolla 2005-2013 | Front Turn Signal Light |
| Toyota Camry 2000-2009 | Front Turn Signal Light |
| Toyota Highlander 2011-2013 | Front Turn Signal Light |
| Toyota Sequoia 2002-2016 | Front Turn Signal Light |
| Toyota Sienna 2004-2020 | Front Turn Signal Light |
| Toyota Venza 2011-2013 | Front Turn Signal Light |