Astra is fitted with tyre pressure sensors. However, these sensors are only on the wheel set where the owner left the car dealership. The pressure transducers for the second set of wheels will have to either be rearranged or purchased separately.
The process of reshuffle is quite laborious, so it will be more profitable to purchase another set. Original sensors code for Astra: 13348393. The cost of one such sensor is about 1,500 rubles.
