DJI Mavic 3 Pro / 3 Pro Cine GPS Board with IMU Module

Compass calibration that fails again and again on a Mavic 3 Pro, even in an open field far from metal, is a frustrating fault. When it comes with GPS loss or an unsteady hover after a crash, the GPS board and its IMU module are a likely cause, and on this drone they're sold together.

This GPS board module with IMU module is listed for the DJI Mavic 3 Pro and Mavic 3 Pro Cine. The listing says each module is tested before shipment but doesn't name the maker, so it's an aftermarket part.

Mavic 3 Pro faults it can explain

• Repeated compass calibration failures.

• GPS signal loss or position errors in open sky.

• Drifting or unstable hovering after an impact.

• IMU errors that recalibration doesn't clear.

Bench sequence

Confirm the fault in a clean location first: away from cars, rebar and power lines. Inspect the GPS cable for damage. If the board itself is at fault, mount the replacement exactly as the original, then calibrate the IMU and compass and wait for a full satellite lock before a low test hover.

With a working GPS and IMU board, the Mavic 3 Pro holds position and returns home reliably again.