DJI Mini 4 Pro Arm & Motor Damage — Diagnosis, Parts & Repair Difficulty
Suspect an arm or motor fault after a crash if the aircraft pulls to one side, vibrates, grinds, overheats or a motor no longer sits level.
DIY difficulty
Advanced
Primary risk
Structural or flight-control damage
Likely tools
Disassembly and soldering tools
Arm damage
Minor mark
Inspect closely; a superficial mark may not require replacement.
Crack, deformation or looseness
Treat this as a structural issue and stop flying.
Motor checks
Does the motor rotate freely?
Can you feel grinding or stiffness?
Is the shaft bent or the motor tilted?
Does it overheat or make an abnormal sound?
Is there visible impact damage?
Repair reality
Depending on the assembly, replacement may require major disassembly, soldering, correct cable routing, correct motor orientation and careful post-repair testing.
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