2021 Model 3 — Known Failures, Repairs & Fixes

Heat pump + refresh BUY

Range263–353 mi

APHW3

Heat pumpYes

TrunkPower (LR)

1 Heat pump · 12V
2 Cameras / Vision
3 A-pillar trim

Illustrative — approximate locations of the most-reported issues for this model year.

What changed

Heat pump standard (from Oct 2020); console redesign, USB-C, power trunk on LR, more acoustic glass.
Radar deleted ~May 2021 (camera-only).
Still has ultrasonic parking sensors.

Known issues

Octovalve/heat-pump valve failures on some early cars.
Phantom braking after the vision switch.
USS intermittent faults.

Recalls

2022-079: Heat-pump cold-operation recall — free OTA.

Repairs & fixes

No heat in deep cold OTA valve recalibration; P/T sensor replacement + A/C evac/recharge if hardware. Precondition as a workaround. Service
Phantom braking Keep software/cameras current and clean; lower set speed on bad roads. DIY
Interior rattles Felt tape at contact points; reseat trim. DIY
12V battery failure Replace the 12V battery. DIY

Verdict

The Model 3 sweet spot for used — mature heat pump, best price-to-features ratio.

References & further reading

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