EL-50448 TPMS OEC-T5: For Vauxhall vehicles equipped with tyre pressure control system, a sensor learning procedure must be carried out after tyre rotation, replacement of the remote door lock receiver module, or replacement of the tyre pressure sensor. This learning procedure can be performed using the EL-50448. Vauxhall RDKS learning system: With this EL50448, you can reprogram your tyre pressure sensors in just 3 steps. This TPMS tool allows easy activation of the TPMS sensor with the push of a button. Tyre pressure gauge: EL50448 is compatible with all General Motors models (Insignia, Astra, Combo, Ampera, Zafira, Antara) equipped with TPMS sensors. How to use: Ensure your vehicle is in TPMS learning mode before using this activation tool. Hold the tool against the tyre sidewall near the valve core. Press and hold the button until a horn sound is heard from the vehicle, indicating successful activation.