Frequency Band: Why 433MHz Matters for Oshan Vehicles
Most aftermarket TPMS sensors operate on either 315MHz or 433MHz. Oshan models, including the Oshan X7, Cos-1° and related Changan-platform SUVs, use 433MHz as standard. This is because the Changan electronics architecture (which Oshan shares) was designed around the 433MHz ISM band for better penetration through metalized window films and lower interference from in-vehicle electronics compared to the 315MHz band used by some U.S. market vehicles.
The BL-ST-042 sensor transmits at 433.92MHz ± 50kHz. If your vehicle originally came with 3601010BK01 or 3601010MK01 stamped on the original sensors, the 433MHz frequency is mandatory — a 315MHz sensor will not communicate with the Oshan TPMS receiver module.
Battery Life & Power Architecture
Each BL-ST-042 sensor contains a 3V lithium manganese dioxide coin cell (typically CR2032 or CR2450 equivalent). These cells are rated for:
- 5-7 years under normal driving conditions (1 hour/day, moderate temperature swings)
- 3-4 years in extreme climates (persistent -30°C or +85°C)
- No user-replaceable battery — the sensor is sealed as a single unit
The sensor enters sleep mode when the vehicle is stationary for more than 15 minutes, drawing <0.5µA. During driving, it transmits at 5-8dBm power in bursts every 60 seconds (triggered by rotation sensing), which balances battery life against real-time pressure updates.
IP Rating: What IP67 Means in Practice
| Rating | Dust Protection | Water Protection |
|---|---|---|
| IP67 | Complete dust ingress protection | Protected against immersion up to 1 meter for 30 minutes |
This is industry standard for clamp-in TPMS sensors. The BL-ST-042’s IP67 seal is achieved through ultrasonic welding of the housing and a rubber gasket at the valve stem base. For Oshan owners who drive through deep puddles or pressure-wash wheels, this rating means no water ingress at the sensor body. However, the valve core and cap are not IP-rated — always use metal caps with rubber O-rings to prevent corrosion at the valve thread.
Protocol Compatibility: Pre-Programmed for Oshan
The sensor is pre-programmed with Changan’s TPMS protocol, which is unique to the brand family. Key compatibility details:
- Protocol type: Proprietary Changan/Oshan 433MHz rolling code
- Relearn procedure: Requires an OBD relearn tool or TPMS trigger tool (the sensor auto-wakes when triggered by a 125kHz LF signal)
- Cross-compatibility: Works on Changan, Kaicene, and Oshan models from 2015 onward — but NOT on Great Wall or Geely platforms even if they use 433MHz
- Clone capability: Can be cloned from an original OE sensor using a compatible TPMS programmer (e.g., Autel TS608, ATEQ VT56)
If you’re replacing a failed sensor on an Oshan X7 or Cos-1°, the BL-ST-042 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Changan, Kaicene, Oshan | OE# 3601010BK01, 3601010MK01, 3601010MK51 is a direct drop-in. No cutting, wiring, or programming required — just mount it with the correct torque (check your vehicle manual for the spec, typically 4-5 Nm) and perform the relearn.
Recommended Part
For owners needing a direct OE replacement for Oshan, we recommend the BL-ST-042 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Changan, Kaicene, Oshan | OE# 3601010BK01, 3601010MK01, 3601010MK51. It matches the 433MHz frequency, IP67 sealing, and protocol of the original 3601010 series sensors. Ensure you verify your vehicle’s year and OE part number before ordering.
FAQ
Can I use a 315MHz sensor on my Oshan if I change the receiver module?
No. The TPMS receiver in Oshan vehicles is integrated into the BCM (body control module) or a dedicated RF module that is tuned only to 433MHz. Replacing it would require rewiring and software changes — impractical and expensive. Stick with 433MHz sensors.
How do I know when the BL-ST-042 battery is dying?
The Oshan dashboard will display a TPMS warning light and a “Low Battery” or “Sensor Fault” message for the specific wheel. You can also check sensor battery voltage with a TPMS diagnostic tool (e.g., Autel MaxiTPMS). Once battery drops below 2.4V, the sensor stops transmitting reliably.
Is the IP67 rating affected if I change the valve stem?
Yes. The BL-ST-042 is a single-piece clamp-in sensor — the valve stem is part of the sensor body. If you replace only the valve stem, you break the seal. Always replace the entire sensor if the valve stem is damaged or corroded.
Will this sensor work on an Oshan Cos-1° 2022?
Yes, provided the original OE number is 3601010MK01 or 3601010MK51. The Cos-1° uses the same Changan-based TPMS system as other Oshan models from 2018 onward. However, verify your specific VIN with BH-Sens compatibility charts if your vehicle has been modified or uses a non-standard ECU.