Requires Diagnostic Tool Calibration The way your model matches: we recommend using OBD learning activation matching is the safest. The special matching instruments on the market are DOTON 508ts, 600Its, 808ts, 906ts all can be OBD activated matching. You can go to a large repair shop nearby which usually has this equipment. Select the model, then enter the special features inside, there are body modules, inside select the tire pressure module system learning to match, which shows the left front wheel learning, left rear wheel learning, right front wheel learning, right rear wheel learning, which tire position you need to learn click to select which, and then confirm the display fast deflation, the corresponding tire operation deflation, display phase matching can be completed. After matching to success, please add air to the four wheels, the corresponding position to add air to have a change is successful, not change need to match again. Type: Car TPMS Tire Pressure Sensor Condition: Fitment: Direct Replacement Operating Frequency: 433Mhz Part Number Code:68249197AA, 68239720AA, 68239720AB, 68239720AC, 68157568AA, 68157568AB, 68157568AC, 68185570AA, 68186572AA, 68186575AA Fitment: For Ram 1500 2014-2018 For Ram 1500 2019-2021 /DX(5-lug) For Ram 2500 2014-2018 For Ram 3500 2014-2018 For Ram 4500 2014-2018 For Ram 5500 2014-2018 For 2014-2017 For () 2016-2018 For () 2019 PHASE 11 Color: Black Material: Metal+Plastic Package Contents: 6 * Car TPMS Tire Pressure Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.