The BYD Seagull has become something of a phenomenon since its launch—a sub-$10,000 EV that actually delivers on range, tech, and build quality. But as the first wave of 2025 models rolls into independent repair shops, a pattern is emerging: the factory TPMS sensors are starting to fail, and the OE replacement path is a dead end for most shops.
Here’s the problem. BYD’s parts distribution for the Seagull is still maturing in export markets. The OE sensor, part number EUEA3609200B, isn’t always in stock at the dealer, and when it is, the price can hit $80–$120 per unit. For a car that costs $9,900 new, that’s a hard pill for owners to swallow. The aftermarket is stepping up, and the BL-ST-096 from BH-Sens is one of the most promising alternatives.
Why the Seagull’s TPMS System Is Different
The Seagull uses a 433MHz direct TPMS system—each wheel has a sensor mounted inside the tire that transmits pressure and temperature data to the car’s BCM. This is the same frequency used by most Asian and European manufacturers, which is good news for aftermarket coverage. But there’s a catch: BYD uses a proprietary protocol on top of the 433MHz carrier. That means you can’t just grab a generic 433MHz sensor off the shelf and expect it to work.
What makes the BL-ST-096 interesting is that it’s pre-programmed to match BYD’s protocol. It’s a clamp-in sensor, which is what the Seagull’s factory wheels require, and it arrives ready to install—no cloning tool needed. That’s a significant advantage for shops that don’t want to invest in a $3,000 TPMS programming station just to service one model line.
Fitment Coverage: More Than Just the Seagull
The BL-ST-096 is listed as fitting 34 vehicle applications, which is good news for shops serving mixed fleets. The Seagull (2025+) is the headline application, but the same sensor covers several other BYD models that share the platform and TPMS hardware. This cross-compatibility is the result of BH-Sens (Baolong Technology) being a tier-1 supplier to BYD’s factory line—they’re not reverse-engineering the protocol; they’re building to the same spec.
| Application | Year Range | Notes |
|---|---|---|
| BYD Seagull | 2025+ | Primary fitment, all trims |
| BYD Dolphin | 2024–2025 | Shared platform |
| BYD Atto 3 | 2024–2025 | Export models |
| Other BYD models | 2024+ | 30+ additional applications |
That factory-background matters. When a sensor is made by the same company that supplied the OE part, the signal strength, sleep mode timing, and temperature compensation curve are all identical to what the car’s BCM expects. You won’t get intermittent signal loss at highway speeds or false low-pressure warnings in cold weather—issues that plague cheap aftermarket clones.
How to Verify Fitment Before You Buy
Here’s the part that trips up both DIYers and shop owners: the Seagull’s TPMS system doesn’t display sensor IDs on the dash. You need a scan tool that can read the BCM’s TPMS data to see what’s currently installed. If the car still has its factory sensors, the IDs will match what’s printed on the sensor body. If a previous shop installed a replacement, you’ll see a different brand’s ID format.
Before ordering the BL-ST-096, do this:
- Check the OE part number. Look at the sensor body through the wheel—you’re looking for EUEA3609200B or a reformatted number like 110964. If it matches, the BL-ST-096 is a direct swap.
- Verify the frequency. Seagull models sold in most markets use 433MHz. Some early Chinese-market units used 315MHz. If your car was imported directly from China, check the tire pressure label on the driver’s door jamb—it will list the frequency.
- Confirm the valve stem type. The Seagull uses clamp-in sensors with a standard metal valve stem. If someone has already switched to rubber snap-in sensors, the wheel may have been modified, and the BL-ST-096 won’t seat properly without replacing the valve stem assembly.
- Check the TPMS system status. If the car is displaying a flashing tire pressure light, the BCM may already have a stored fault code that needs clearing before the new sensor will sync. The BL-ST-096 is pre-programmed, but the car still needs to learn the sensor ID via a TPMS reset procedure.
Pro Tip: The Seagull’s TPMS relearn procedure is not the standard “drive the car for 10 minutes” method. The car will only learn new sensor IDs when stopped, with the ignition on and the TPMS scan tool in “teach” mode. Use a professional-grade tool like an Autel TS508 or a Snap-on TPMS unit—the cheap $40 tools won’t communicate with BYD’s BCM.
The Installation Reality
If you’re doing this in the shop, budget about 45 minutes per wheel. The Seagull’s tire dismount is straightforward—no run-flat sidewalls to fight—but you’ll need to be careful with the aluminum valve stem nut. It’s torqued to 4.5 Nm at the factory, and over-tightening will crack the sensor housing. Use a torque wrench, not an impact gun.
The BL-ST-096 comes with a new valve stem nut and sealing washer in the box. Replace both, even if the old ones look fine. The washers are single-use and will leak if reused. This is a common mistake that leads to a comeback—the sensor is fine, but the air is escaping around the stem.
Market Outlook: What to Expect in 2026
The Seagull is entering its second model year, and BYD has already announced a range increase for the 2026 model. That means more cars on the road, more TPMS failures, and more demand for aftermarket sensors. The BL-ST-096 is priced at roughly 30–40% below the OE part, which makes it an attractive option for cost-conscious owners and shops that want to offer a value alternative without sacrificing quality.
One caveat: the BL-ST-096 is pre-programmed, which means it’s not adjustable for different vehicle protocols. If you buy one for a Seagull and then need a sensor for a different BYD model that uses a different protocol, you’ll need a different SKU. That’s the trade-off for a plug-and-play sensor. The upside is that you don’t need a programming tool, and the sensor is ready to install right out of the box.
For the independent shop, the BL-ST-096 is worth carrying in stock—especially if you service any BYD products or other Chinese EVs that are increasingly common at the budget end of the used market. It’s a solid OEM-grade replacement at an aftermarket price, and it eliminates the most common TPMS complaints: false warnings, signal dropouts, and short battery life.
If you’re looking to add this sensor to your inventory or need a single unit for a customer’s Seagull, the BL-ST-096 at Longweiparts is a direct fit with OE matching specs. It’s one of those parts that just works—and in the TPMS world, that’s saying something.
Recommended Part: BL-ST-096 – OE-grade replacement, in stock now.
