CABRIO TPMS Relearn: Auto, OBD, and Stationary Procedures Step by Step

What a Relearn Actually Does

Each TPMS sensor broadcasts two things on a fixed frequency: a unique ID and the current pressure. The TPMS module keeps a list of IDs it trusts. If a wheel reports an ID that isn’t on that list, the module ignores it and lights the warning.

That creates two different jobs people both call “relearn”:

• Relearn / reset — the IDs haven’t changed; you just rotated tires or corrected pressure. The module is told to re-verify the wheels it already knows.
• Programming / ID write — a sensor was replaced, so a new ID exists that the module has never seen. This one almost always needs a tool.

Knowing which situation you’re in saves you an hour of pointless driving.

Tools You’ll Need

• A TPMS activation/trigger tool with 433MHz support (Autel, ATEQ, Bartec and similar all cover this band)
• An OBD-II scan tool or TPMS tool with OBD write capability for BMW/Mini platforms
• Accurate tire gauge and a compressor
• Access to your car’s reset menu (iDrive screen, BC stalk, or a dedicated reset button depending on model)
• Standard tire-shop tooling if you’re physically replacing the sensor

Method 1: Auto Relearn (Drive Cycle)

The simplest path, and only valid when the module already has the correct IDs stored.

• Set all four tires to the pressures on the door jamb placard — not to a number you saw online.
• Run the reset from the vehicle menu: on iDrive cars it’s under Vehicle Info → Vehicle Status → Tire Pressure → Reset; on older dash layouts it’s a reset button or a BC-stalk routine. Confirm the reset when prompted.
• Start the engine and drive continuously above roughly 20–25 mph (30–40 km/h) for about 10 minutes.
• The warning light clears once the module hears all four IDs reporting.

If the light comes back, or never clears, you’re not dealing with a reset — you’re dealing with an unregistered ID. Move to Method 3.

Method 2: Stationary Relearn (Trigger Tool)

This wakes each sensor and captures its ID without driving.

• Park with the ignition on, as directed by your tool’s on-screen prompt.
• Select the correct make/model/year in the tool.
• Hold the tool’s antenna flat against the tire sidewall near the valve stem, then press trigger.
• Wait for the confirmation — a horn chirp or an on-screen ID capture.
• Work through the remaining wheels in the order the tool displays.
• On BMW/Mini systems, the tool usually then asks you to connect to the OBD port to push those IDs into the module.

Clamp-in metal valve stems attenuate the signal, so keep the antenna on the sidewall next to the stem, not against the stem itself.

Method 3: OBD Relearn (ID Write)

This is the procedure that actually fixes a dead-sensor situation on most BMW and Mini platforms.

• Plug the tool into the OBD-II port under the driver’s side dash.
• Navigate to the TPMS or chassis/body menu and select Relearn / ID Write.
• When prompted, trigger each sensor in turn.
• Let the tool write the IDs and confirm completion.
• Clear any stored TPMS fault codes.
• Cycle the ignition off and on, then complete the drive cycle from Method 1 to finalize the learn.

Sensor Specs for This Platform

Buying the wrong frequency is the most common mistake here. If your original sensor or the module label says 433MHz, a 315MHz part will never register no matter how many times you trigger it.

Practical Notes Before You Start

• “Pre-programmed” means the sensor is already built to the correct protocol for the platform — it does not mean the car knows about it. A pre-programmed 433MHz unit such as RDE027V21 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Alpina, BMW, Mini | OE# 36106856209, 36106881890, 6855539 still needs its ID written on BMW/Mini systems.
• Check whether your car uses direct TPMS (valve-stem sensors) or indirect ABS-based monitoring. Indirect systems have no sensors in the wheels and no relearn at all — just a reset button.
• Don