2020 Model 3 — Known Failures, Repairs & Fixes

Pre-heat-pump, HW3 OK

Range250–322 mi

APHW3

Heat pumpNot yet

PlantsFremont, Shanghai

1 Touchscreen / MCU
2 Heat pump · 12V
3 Window regulator / door

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

What changed

HW3 standard; Shanghai production supplements Fremont.
Resistive heating until the heat pump arrives ~Oct/Nov 2020.
MCU2 (Intel Atom) standard — a few very early cars may still be MCU1.

Known issues

No heat pump on most of the year — winter range hit.
Very early builds may have MCU1 (eMMC failure risk).
Door/latch can freeze shut in hard cold.
Paint/panel quality variance.

Recalls

Various 2020 campaigns (seat-belt chime, etc.) — verify by VIN.

Repairs & fixes

Confirm MCU1 vs MCU2 before buying Service menu → Software → Hardware; MCU1 risks eMMC 'screen death' and needs a paid MCU upgrade. MCU2 is fine. Service
Door won't open in freezing weather Pre-heat/defrost from the app before unlocking; free the iced latch/seal; keep seals treated. DIY
Weak winter heat / range (resistive) Inherent pre-heat-pump — precondition while plugged in. DIY
12V battery failure Replace the 12V; app usually warns first. DIY

Verdict

Acceptable, but verify MCU2 and HW3. A 2021 with the heat pump is the better buy if budget allows.

References & further reading

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