Model 3buyer's guide

Used Model 3s with degraded battery packs can lose 15–25% of rated range without the seller disclosing it — and range loss isn't obvious on a short test drive. This guide shows you which built-in diagnostics to pull at the test drive to measure actual battery health before you agree to a price.

This guide covers 13 documented faults: battery range degradation, glass roof seal failure and water ingress, door seal air noise at motorway speed, MCU fan failure and touchscreen lag, 12V battery failure (common on older builds), suspension creaking on early Long Range models, rear motor oil seal leak on AWD variants, charge port latch failure, autopilot camera delamination, door handle failure on pre-2021 builds, panel gap misalignment, seat rail creak, and HVAC condensate drain blockage. Each fault includes what to check, how to verify it at the car, and what it costs to fix.

The Model 3 is the most thoroughly tested EV platform at this price point. This guide tells you what to check to make sure the one you're buying is actually one of the good ones.