The Chery TIGGO E has carved out a solid niche in the compact EV crossover segment, but owners and independent shops alike have run into the same wall: tire pressure monitoring system (TPMS) sensor failures that throw false warnings and, worse, disable the system entirely. The root cause isn’t always the sensor itself—it’s often the original equipment units degrading after three to five years of exposure to heat, road salt, and constant pressure cycling.
For 2026, the aftermarket picture is shifting. The BL-ST-074 from BH-Sens (Baolong Technology) has emerged as the go-to replacement for TIGGO E owners who want a clamp-in sensor that matches OE behavior without the dealership markup. It’s a pre-programmed unit broadcasting at 433MHz, which covers the majority of Chery-built platforms—including the TIGGO E, Chery EV models, and Cowin variants.
How the Sensing Actually Works
Understanding why this sensor works requires a quick look at the physics inside the valve stem. The BL-ST-074 uses a piezoresistive pressure transducer—a silicon diaphragm that deforms under tire pressure changes, altering its electrical resistance. A Wheatstone bridge circuit converts that resistance change into a millivolt signal, which the onboard microcontroller amplifies, temperature-compensates, and digitizes.
Temperature compensation matters more than most drivers realize. Tire pressure swings roughly 1 psi per 10°F change in ambient temperature, and a TPMS sensor that ignores thermal drift will trigger false low-pressure warnings on cold mornings. Baolong’s algorithm applies a correction curve based on the internal thermistor reading, so the TIGGO E gets an accurate pressure reading whether the tires are at 20°F or 110°F.
The transmission side is equally straightforward. At 433MHz, the sensor wakes on a programmed schedule—typically every 40 to 60 seconds while driving—and sends a data frame containing sensor ID, pressure, temperature, and battery status. The TIGGO E’s body control module receives this RF signal, validates the sensor ID against its learned list, and displays the reading on the instrument cluster.
Signal Types and Measurement Principles
The BL-ST-074 uses a direct measurement protocol, meaning it physically measures pressure inside the tire rather than inferring it from wheel speed differences (indirect TPMS). Direct systems are more accurate and respond faster to rapid deflation—a critical safety factor for EV owners who run higher curb weights.
The data frame is encoded using frequency shift keying (FSK) modulation, a robust method that resists interference from other 433MHz devices. Each frame includes a rolling counter to prevent replay attacks, ensuring a cloned sensor can’t spoof the system into showing a false “all good” status.
Fitment and Installation Realities
The BL-ST-074 is listed for nine OE applications across Chery, Chery EV, and Cowin models, with direct cross-reference to OE numbers 11652AWARDKS and 802000012AA. That covers the TIGGO E’s standard 18-inch and 19-inch wheel packages without modification.
Installation is a clamp-in procedure—remove the old sensor, torque the new one to 35 lb-ft (the spec is printed on the housing), and let the vehicle learn the new sensor ID. Most TIGGO E models support auto-learn by driving above 15 mph for 10 minutes. If your scan tool supports TPMS programming, the process takes under five minutes per wheel.
What sets this sensor apart is the battery life. Baolong rates it for 7-10 years of normal use, which outlasts the typical OEM unit by two to three years. At roughly one ounce, the weight penalty is negligible—important for EV efficiency nerds who track every gram of unsprung mass.
Pro Tip for Shops
Don’t skip the valve core replacement when installing the BL-ST-074. The factory cores on older TIGGO E wheels are often corroded, and a leaking core will trigger a slow-pressure fault that mimics a sensor failure. Replace the core, inflate to 36 psi cold, and verify with a handheld gauge before clearing codes.
Market Outlook and Buyer Takeaway
The TPMS aftermarket for Chinese-built EVs is maturing fast, and the BL-ST-074 is proof that you don’t need to source from a dealership to get reliable, OE-equivalent performance. For independent shops, stocking this sensor covers a wide swath of Chery platforms with a single SKU. For owners, it’s a straightforward DIY swap that eliminates the check-engine light and restores accurate pressure monitoring.
The 433MHz frequency band remains the standard for this platform, and Baolong’s pre-programmed approach means no cloning tools are required—install, learn, drive. If you’re tired of chasing intermittent TPMS faults on a TIGGO E, this is the fix. The BL-ST-074 delivers the sensing accuracy, transmission reliability, and battery longevity that the original equipment should have offered from day one.
Recommended Part: BL-ST-074 – OE-quality aftermarket part, ready to ship.
