Why the Frequency Band Is the First Filter, Not the Last
A TPMS sensor is a pressure gauge with a radio transmitter glued to it. If the band is wrong, the car’s receiver never hears it. No amount of correct pressure data helps. There are three bands in circulation on modern vehicles:
315 MHz — North American market, older Japanese and Korean platforms, and a slice of early Chinese-market vehicles.
433 MHz — Europe and the overwhelming majority of Chinese domestic models, plus nearly all “universal” aftermarket sensors. The 433 band is the default assumption, which is exactly why people get burned by it.
2.4 GHz BLE — the newer architecture. The sensor speaks Bluetooth Low Energy instead of a proprietary sub-GHz protocol. Tesla is the best-known adopter, and several recent Chinese EVs adopted it for the same reasons: one global part number, no per-region radio licensing, and the ability to read tire pressures from a phone app or a scan tool instead of only from a dedicated receiver.
The trade-off with 2.4 GHz is real. BLE has shorter effective range and shares spectrum with Wi-Fi, key fobs, and every phone in the car park. It also demands a stricter handshake — the sensor and the vehicle ECU have to agree on the pairing sequence, not just the frequency.
Verifying the band on your 星纪元ET
Do not trust a fitment website alone, and do not assume that because one 星纪元ET uses 433 MHz, every 星纪元ET does. Build date and trim level split hardware within the same model year more often than most owners expect.
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