dropped my mavic 3 classic coming in too fast for a landing and it bounced pretty good off some gravel. the gimbal looks physically fine, no cracked housing or anything visible, but now when i power it on the horizon is like 3-4 degrees off and it slowly drifts further to the left over about 10 minutes of use. ive tried the gimbal auto calibration thing in the app probably six times now and it helps maybe a tiny bit but never fully fixes it.

DJI wants like $180 to look at it which honestly might be worth it but im wondering if anyones managed to sort this kind of thing out themselves first. ive seen people mention recalibrating the IMU inside the gimbal assembly but i have no idea how involved that actually is. im comfortable with soldering and taking things apart generally but i dont want to make it worse if its something that genuinely needs their jig or whatever.

the drift is usually a sign the gimbal IMU took a hit, not just a calibration issue. the auto cal in the app only does so much if the sensor itself got knocked around. i tried the same thing with my mini 2 after a tree strike and ended up just sending it in, the internal IMU recal requires DJIs tools as far as i can tell, you cant really do it with third party software. $180 is annoying but probably cheaper than a new gimbal assembly if you crack something open and it goes sideways.

before you send it off try doing the IMU calibration through the main aircraft settings not just the gimbal one, like the full aircraft IMU recal on a level surface. i know it sounds unrelated but on my air 2s a hard landing knocked my readings out and doing a fresh IMU cal actually fixed a weird gimbal drift i was having. might be worth 5 minutes before you shell out. also make sure the gimbal ribbon cable didnt get slightly unseated, that can cause some really weird behavior and its pretty easy to check if you pop the bottom cover off carefully.