The Chery RX C-DM is hitting more North American and European driveways every quarter, and with that comes a predictable wave of TPMS service work. If you’ve got one on the lift with a blinking tire pressure light, you’re likely staring at a sensor that needs replacing—not reprogramming. The BH-Sens unit (SKU: BL-ST-038) has been moving fast through aftermarket channels, but only if you know what its spec sheet really tells you. Let’s cut through the jargon.
The Specs That Matter, Not the Marketing
First, the frequency. This sensor broadcasts at 433MHz, which is the standard for most Asian-market vehicles, including the RX C-DM built for export. Don’t confuse this with the 315MHz used on older North American Chrysler or Ford platforms. If you install a 315MHz unit into an RX C-DM, you’ll get zero communication with the BCM—end of story. The 433MHz band gives better penetration through the wheel well and tire construction, especially on the C-DM’s larger 19- and 20-inch alloy packages.
Second, the clamp-in design. This replaces the entire valve stem, torqued to 4 Nm using a dedicated socket. It’s the correct choice for aluminum rims. The rubber grommet and nut are included in the box, so you won’t be chasing washers across the shop floor. The sensor body is sealed to IP67—dust-tight and protected against immersion up to 1 meter. That’s not just marketing fluff; it means pressure washing the undercarriage or hitting a deep puddle won’t kill the electronics. I’ve seen cheaper units fail after one aggressive washdown.
Connector and Programming: Pre-Programmed Doesn’t Mean Plug-and-Play
The BL-ST-038 is listed as pre-programmed, which is a double-edged sword. It comes set with the correct 433MHz ID structure and standard sensor protocol for the RX C-DM, so you don’t need a blank unit and a TPMS tool to write the ID. However, you still need to perform the learning procedure—either via a TPMS tool (like the Autel TS508 or MaxiTPMS TS401) or the vehicle’s own relearn mode through the dash menu. The sensor’s internal memory holds the ID until you pair it, and the battery is rated for roughly 5-7 years depending on temperature extremes.
| Spec | Value | Practical Meaning |
|---|---|---|
| Frequency | 433MHz | Matches RX C-DM BCM; 315MHz will not work |
| Type | Clamp-in | Requires valve core removal tool; torqued to 4 Nm |
| IP Rating | IP67 | Safe for pressure washing and water immersion |
| Programming | Pre-programmed | No need to blank; still requires relearn |
| Voltage Range | 2.1V – 3.6V | Operates reliably with aging battery down to 2.1V |
Common Mistakes and Pro Tips
Pro Tip: When installing on the RX C-DM, always replace the metal valve core and cap. The BH-Sens kit includes them, but I’ve seen techs reuse the old core—which often has a worn seal—causing a slow leak that brings the customer back in two weeks. Also, torque the stem to 4 Nm, not 4 ft-lb. That’s a 66% difference. Over-torquing cracks the housing.
One more thing: the voltage range on the data sheet (2.1V to 3.6V) matters in cold climates. When the battery drops below 2.7V under a -20°C load, some sensors trigger a false low-pressure alert. This unit holds its signal down to 2.1V, meaning you’ll get a true low-battery warning, not a phantom pressure reading.
Who Should Fit This Unit
If you’re servicing a Chery, Exeed, or Cowin with the RX C-DM platform—or the crossover siblings that share the same TPMS module—this is a direct OE replacement. The fitment list covers 33 vehicle applications, which makes it a smart stocking unit for independent shops. Avoid it for older 2019-2021 models that used a different protocol; those require the 315MHz or a different ID structure.
For shop owners, keeping the BL-ST-038 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Chery, Chery Ev, Cowin, Exeed | OE# 802000121AA, 802000126AA, F02361701001AA on the shelf eliminates a vehicle downtime day. It’s around $20-25 less than dealer OE pricing, and the quality from Baolong (who supplies original equipment to many Chinese OEMs) holds up. Bottom line: if the RX C-DM rolls in with a dead sensor, this is your fix—just remember the 4 Nm torque and the relearn step.
Recommended Part: BL-ST-038 – OE-grade replacement, in stock now.
