You should always take your car to a professional mechanic or tire technician to repair or replace your tire pressure sensor. This is because specialist knowledge and tools are required, including, most often, a vehicle manufacturer specific relearn tool. Whether the issue is a dead battery or a damaged or malfunctioning sensor, you’ll almost always have to get replacement sensors, as in most vehicles, they come with built-in batteries. Once the replacement sensor has been installed, the technician will use a relearn device to sync the sensor with your vehicle’s TPMS so you get accurate results in the future.