Model Xbuyer's guide

The falcon wing door motor is the single most expensive surprise on a used Model X — replacement runs $1,500–$2,500 per side, and most sellers don't disclose it. This guide tells you exactly which years are worst-affected, what to listen for during the door cycle, and what to check before you hand over any money.

This guide covers 11 documented faults in detail: falcon wing door actuator failure, air suspension compressor failure, drive unit whine, MCU1 eMMC degradation (on pre-2018 builds), battery thermal management issues, door handle failure, touchscreen unresponsiveness, panoramic roof seal leaks, tow hitch water ingress, charge port latch failure, and high-voltage cable corrosion. Each fault entry includes what it looks like, how to check for it on a test drive or with a visual inspection, and what the repair typically costs.

Written so a non-mechanic can run through it at the car. Most checks require nothing beyond your phone, your eyes, and five minutes.