Why Frequency Matters: 433MHz vs. 315MHz
When you search for a GWM TPMS sensor, the first spec you must check is the radio frequency band. GWM vehicles—including Haval H6, Ora Good Cat, Poer pickup, and Tank 300—consistently use the 433MHz ISM band for tire pressure monitoring. The 315MHz frequency is common in older North American and Japanese vehicles, but Chinese OEMs like GWM standardized on 433MHz for better range and penetration through metal wheel rims.
Using a 315MHz sensor on a GWM will result in the TPMS light staying on, no signal reception, and failed relearn procedures. The BH-Sens BL-ST-073 is engineered for 433MHz operation and has been validated across multiple GWM platforms.
Battery Life: What to Expect from BH-Sens Sensors
The BL-ST-073 sensor contains a lithium manganese dioxide (Li-MnO2) cell rated for 5-7 years under normal driving conditions (15,000-20,000 km/year). Key factors that reduce battery life:
- Extreme temperatures (persistent -30°C or +80°C inside tire)
- High centrifuge forces from sustained high speeds (above 160 km/h)
- Frequent pressure loss events that trigger active transmissions
When the battery dies, the sensor stops transmitting. The TPMS module will show no signal for that wheel. Because the BL-ST-073 is pre-programmed and sealed, there is no replaceable battery—you replace the entire sensor.
IP Rating: Dust and Water Protection in Real Conditions
The BL-ST-073 carries an IP67 rating:
- 6: Dust-tight (no ingress of dust particles)
- 7: Immersion up to 1 meter for 30 minutes
In practical terms, this means the sensor survives:
- Rain and pressure washing (as long as the valve core is properly tightened)
- Puddle immersion during off-road driving (GWM Tank series owners, take note)
- Dusty environments common on construction sites where GWM Poer pickups operate
However, IP67 does not mean the sensor is waterproof while the tire is deflated—the seal between sensor body and valve stem relies on the tire’s internal pressure to maintain compression. If the tire is flat, water ingress is possible.
Protocol Compatibility: How GWM TPMS Communicates
GWM uses a proprietary single-wire UHF protocol on 433MHz with specific data frame formatting. The BL-ST-073 is pre-programmed with GWM’s protocol parameters:
| Parameter | GWM Specification | BL-ST-073 Compliance |
|---|---|---|
| Frequency | 433.92 MHz | ✅ 433.92 MHz |
| Data Modulation | ASK / OOK | ✅ ASK / OOK |
| Encoding | Manchester with CRC | ✅ Manchester + 8-bit CRC |
| Relearn Trigger | Auto-location / OBD relearn | ✅ Both methods supported |
| Pressure Range | 0-800 kPa (0-116 psi) | ✅ 0-800 kPa |
| Temperature Range | -40°C to +125°C | ✅ -40°C to +125°C |
The sensor sends pressure and temperature data every 60 seconds when stationary, and every 15 seconds above 25 km/h. It also supports auto-location—the vehicle identifies which wheel the sensor is on without manual triggering.
Fitment Check: GWM and Beyond
The BL-ST-073 is not GWM-only. Its OE cross-references include:
- 01732445 (BAIC / BAIC EV)
- 25M01A031A (Geely / Geometry)
- 3641100XKR02A (GWM Haval)
- 3641101XKN01A (GWM Ora)
- 3666200U3400 (GWM Poer)
- B00011299 (Geely)
If your vehicle uses any of these OE numbers, the BL-ST-073 is a direct fit. The sensor is clamp-in type with a standard 9mm valve stem hole—no adapter rings needed for aftermarket wheels.
Installation Notes
- Torque: Tighten the valve nut to 4-5 Nm. Over-tightening can crack the sensor housing.
- Relearn: After installation, use an OBD TPMS tool (like Autel or Bartec) to initiate the relearn procedure. The BL-ST-073 will transmit its unique ID within 30 seconds of being powered (tire inflated above 30 psi).
- Valve stem: Use a new metal valve stem and cap. Rubber stems degrade and cause air loss.
Recommended Part
If you need a direct replacement for GWM, BAIC, or Geely vehicles with OE numbers 01732445, 25M01A031A, or 3641100XKR02A, the BL-ST-073 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits BAIC, Baic Ev, GWM, Geely, Geometry & 8 More | OE# 01732445, 25M01A031A, 3641100XKR02A is a verified, pre-programmed solution. No cloning or dealer visit required—just install and relearn.
FAQ
Can I use a 315MHz sensor on my GWM vehicle?
No. GWM TPMS modules are designed for 433MHz only. A 315MHz sensor will not pair, and the TPMS light will remain illuminated. Always verify the frequency before purchasing.
How do I know when the TPMS sensor battery is dying?
You will see intermittent “No Signal” warnings for a specific wheel, followed by a persistent fault. The sensor does not give a low-battery warning—it simply stops transmitting. Most BH-Sens sensors last 5-7 years from the installation date.
Does the BL-ST-073 work with GWM Tank 300 and Tank 500?
Yes. These models use the same 433MHz frequency and OE number 3641100XKR02A. The sensor fits the alloy wheels on both Tank 300 and Tank 500.
Can I install the sensor myself, or do I need a shop?
You can install it yourself if you have a tire mounting machine and a torque wrench for the valve nut. The relearn procedure requires a TPMS scan tool—many auto parts stores will perform this step for a small fee if you bring the car to them.