A distinction is made between the directly measuring tire pressure monitoring system (active TPMS) and the indirectly measuring tire pressure monitoring system (passive TPMS). We have compared the two in the following table:
|Direct measuring TPMS||Indirect measuring TPMS|
|Description||The air pressure sensors are located inside the tire either at the valve or in the rim bed. The engine control unit receives information from the pressure and temperature sensors at regular intervals by radio.||This system controls the vehicle's wheel speeds. The information is provided by the sensors of the anti-lock braking system. The system refers to the speed of one wheel compared to the other wheels. Alternatively, the measurement is made via the traction control system, which checks the vibrations between the tires and rims, as these are pressure-dependent.|
|Advantages||The wheel sensors can accurately determine the current tire pressure and also warn if the temperature is too high. The tire sensors register gradual as well as sudden pressure loss. Likewise, they also measure when the car is stationary.||Other signals from the tires, such as acceleration, are also analyzed by the software.|
|Disadvantages||Air pressure sensors must be installed at a specialist workshop and separate tire pressure sensors are required for each set of tires.||A simultaneous pressure loss of all tires can not be detected with this measurement, because it only measures the differences. Retrofitting is not possible. On some vehicles, recalibration is necessary after a tire change. The ABS does not provide information about which wheel is losing air pressure, only about the traction control. Measurements are only possible when the vehicle is moving.|
|Some vehicle manufacturers who prefer the particular TPMS||BMW, Mini, Ford, Hyundai, KIA, Opel, Porsche and Renault||Seat, Skoda, Mazda, Honda, Audi and VW|
Older cars do not have to be retrofitted with TPMS. The tire pressure monitoring system is only mandatory for new cars. For all vehicles for which it is mandatory, a TPMS is already included ex works. Who nevertheless also wants to retrofit older vehicles with a TPMS, for which the directly measuring TPMS comes into question. This generally requires a visit to a specialist workshop, since you often have to teach the tire pressure sensors. Special programming devices are used for this purpose. But not with each vehicle the tire pressure sensors Anlernen in the workshop is necessary.
That is different from manufacturer to manufacturer. With some vehicles the tire pressure sensor teach-in takes place during the first journey by itself. Also a manual teach-in over the menu in the vehicle is possible. This process is described in more detail in the vehicle manual. Since many drivers pay little attention to the air pressure of their tires, it is advisable to retrofit the TPMS in older vehicles as well. This also optimizes fuel consumption and driving safety in older vehicles.
If you want to buy a tire pressure sensor, the first thing you should do is select your vehicle, because the air pressure sensors differ from vehicle to vehicle. We have a comprehensive and high-quality range of tire sensors from many well-known parts manufacturers, for example, Schrader, VDO, Herth+Buss as well as HUF. Many of these wheel sensors are used directly as original equipment parts, that is, installed by the car manufacturers ex works. The other parts manufacturers offer the wheel sensors in comparable quality and thus meet all the specifications of the vehicle manufacturers. In addition, we have directly the appropriate tool needed to retrofit TPMS. If you are not sure which tire pressure sensors are suitable for your vehicle, please contact our customer service with the vehicle identification number.
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