【Tire Pressure Relearn Tool】 TPMS Relearn Tool is a essential tool with tire pressure monitoring system, it can make tire pressure matching with vehicles when replacement tire pressure sensor, tire pressure alarm remove or exchange tires. Bring you safety and security. 【Activate TPMS】When you inflate the tires of the vehicle, your tire pressure parameters will change and the vehicle will prompt that TPMS needs to be activated. At this time, you can use the TPMS tire relearn tool to activate and troubleshoot to ensure the normal operation of the vehicle. 【Easy to Use TPMS Monitor Sensor Tool】You can finish activated independently within 3—5 minutes. Save your time and money, much better than going to a dealer or tire storage just to reset the pressure sensor. 【Suitable Scope for Vehicles】Compatible for 2006-2019 vehicles (///Opel/, etc.) 【How to Use】Before u use the EL-50448 tire pressure sensor tool,make sure u set the car into TPMS Learn Model and follow the car light indication.Hold it against the sidewall of the tire, near the valve stem. Depress Learn button until u heard horn sound from the car.