The SONG PRO DM-I rolls into the bay with a blinking TPMS light and a driver who swears the tires look fine. They are, mostly — but the sensor in the left rear is dead at 42,000 miles, and the new 433MHz unit sitting on the bench needs to be introduced to the car. This is where the relearn procedure separates a 15-minute job from a two-hour headache.
For the DM-I, BYD uses a direct TPMS system that requires a relearn after any sensor replacement or tire rotation. The good news: you don’t need the dealer’s $3,000 diagnostic tool. The bad news: you need to know which of the three relearn methods actually works on this platform.
Relearn Method 1: OBD Tool (Fastest, Most Reliable)
This is the shop-approved route. Plug in an Autel TS508 or similar OBD-capable TPMS tool, select BYD → SONG PRO DM-I, and follow the prompts. The tool sends a trigger signal to each sensor in sequence — start at the left front, move clockwise, and confirm each one as the horn chirps or the parking lights flash.
Time: 5 minutes. Difficulty: None. Tool required: OBD TPMS tool ($150-400).
The DM-I’s BCM responds consistently to OBD relearns. If you’re doing this weekly, the tool pays for itself in savings on shop supplies alone.
Relearn Method 2: Auto Relearn (No Tool, But Patience Required)
The DM-I also supports an automatic relearn mode. With the vehicle at rest and the ignition in RUN, the system enters a learning state after a specific button sequence — typically pressing the TPMS reset button (under the dash, left of the steering column) for three seconds until the horn sounds once.
Then drive. The system picks up each sensor’s signal as the vehicle moves above 15 mph. The catch: you need to complete a full drive cycle of 10-20 minutes, and the system won’t confirm each sensor individually — it just works or it doesn’t.
Time: 20-30 minutes of driving. Difficulty: Medium. Tool required: None.
Relearn Method 3: Stationary Trigger (For the No-Tool, No-Drive Scenario)
Some DM-I owners report success with a stationary trigger using a handheld LF transmitter placed against the valve stem. This mimics the OBD method but requires manually selecting each wheel position in the vehicle’s diagnostic menu — a feature buried in the infotainment’s hidden service interface.
Time: 15 minutes. Difficulty: High (accessing the service menu is fiddly). Tool required: 433MHz trigger tool ($30-60).
Pro Tip: The DM-I’s TPMS module is sensitive to sensor battery voltage. If a new sensor fails to register, check the battery level before blaming the sensor. Low-voltage units from budget brands will trigger the light within 24 hours, even after a successful relearn.
Common Mistakes
- Skipping the relearn entirely. A new sensor won’t auto-register. The light stays on until you complete a relearn.
- Using a 315MHz tool on a 433MHz system. The DM-I runs 433MHz. A mismatched tool won’t trigger the sensors.
- Not checking sensor compatibility. The SONG PRO DM-I uses a specific sensor format — the BH-Sens 433MHz TPMS Tire Pressure Sensor (SKU: BL-ST-062) is pre-programmed to match BYD’s OE protocol, which eliminates the need for cloning and reduces relearn failures to near zero.
The Bottom Line
Relearn the DM-I with an OBD tool if you have one; fall back to the auto method if you’re in the field. Either way, use a sensor that’s already programmed for the vehicle. The BL-ST-062 from BH-Sens (Baolong Technology) fits the DM-I’s 433MHz system out of the box — no cloning, no coding, just install and relearn. At roughly $25-35 per unit, it undercuts dealer pricing by half while matching OE reliability.
For shops, that’s a profitable upsell and a satisfied customer. For DIY owners, it’s the difference between a weekend project and a dealership appointment.
Recommended Part: BL-ST-062 – OE-grade replacement, in stock now.
