It started with a dashboard warning that most ZS owners eventually see: the tire pressure light, blinking intermittently at 70 mph on a hot August afternoon. For one fleet manager in Birmingham, UK, that little amber icon triggered a week of frustration—three different tire shops, two replacement sensors from a local parts chain, and a dealer quote that made him laugh out loud. The problem wasn’t the tires. It was the sensors themselves.
The 2021 MG ZS (sold as the Roewe ZS in China and the MG ZS in Europe) uses a 433MHz direct TPMS system. The OE sensors are Baolong units, and they’re known for one specific failure mode: internal battery death at the three-to-five-year mark. The catch? Aftermarket “universal” sensors from the big box stores often don’t communicate properly with the ZS’s body control module. The customer had already been burned by two generic clones that threw constant “Sensor Fault” codes. That’s where BL-ST-068 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Im, MG, Rising, Roewe | OE# 10290600, 10625492, 10718213 came in.
The Diagnosis: It’s Almost Never the Valve Stem
The first shop replaced a valve stem, thinking it was a slow leak. The second shop blamed the receiver module in the car. Both were wrong. When the car finally landed in a shop that actually scanned the TPMS data, the issue was clear: three of four sensors were reporting “No Signal” intermittently. On a 433MHz system, that’s almost always a dead or dying internal battery. The sensors are sealed units—you don’t replace batteries, you replace the whole sensor body.
The technician ordered the BH-Sens BL-ST-068, a clamp-in unit that’s pre-programmed and ready to install out of the box. No cloning tool required, no dealer-level programming equipment. The OE frequency matches at 433MHz, and the sensor body is identical in form factor to the original Baolong part.
The Fix: 40 Minutes, Including Tire Mounting
Here’s the workflow that cracked it:
- Remove all four wheels and break the beads on the tire machine.
- Snap off the old sensors—they’re held in by a standard clamp-in nut.
- Install the BL-ST-068 units—torque to 4.5 Nm, don’t over-tighten.
- Reinstall tires and wheels, then drive for 10 minutes above 30 mph.
- The car auto-learned the new sensor IDs without any diagnostic tool.
That last point is the killer feature. Many ZS owners assume they need a $300 TPMS programming tool or a dealer visit. They don’t. The BL-ST-068 is pre-programmed with a compatible ID range, and the ZS’s system accepts it after a short drive. The entire job took one technician 40 minutes, and the customer walked out paying £85 per wheel—versus the dealer’s £180 per sensor plus labor.
Pro Tip: If your ZS throws a TPMS fault after installation, check your tire pressures first. The BH-Sens units will trigger a warning if the pressure is more than 0.3 bar off. Don’t immediately assume the sensor is defective.
Key Specs
- Brand: BH-Sens (Baolong Technology)
- Frequency: 433MHz
- Type: Clamp-in, pre-programmed
- OE References: 10290600, 10625492, 10718213
- Weight: ~1 oz
- Fitment: 59 vehicle applications across MG, Roewe, Rising, and IM brands
The Aftermath: Six Months Without a Blip
We checked in with that fleet manager six months later. The BL-ST-068 units have been dead reliable through winter temperatures, highway runs, and the occasional curb scrape. He’s since ordered two more sets for his other ZS vans. The lesson? Don’t chase cheap clones that need re-learning every few weeks. Buy the sensor that’s actually designed for the car’s protocol.
If you’re looking at a TPMS light on your ZS and the tire shop says “it’s the sensor,” skip the generic parts store gamble. The BL-ST-068 is a direct drop-in replacement that takes the guesswork out of the job. It’s the difference between a 40-minute fix and a week of head-scratching.
Recommended Part: BL-ST-068 – OE-grade replacement, in stock now.
