iM TPMS sensors are pre-programmed tire pressure sensors for a specific car make and model. iM TPMS sensors are identical in form and function to OE sensors. The sensors do not require pre-setting and the procedure for adapting to the car is exactly the same as for OE sensors. The tightening torque of the nut is 4.0 Nm (+/-0.2). Each time the sensor is removed and reinstalled, the valve seal, the mounting nut and the core must also be replaced.