Brake and stability control alerts at power-on that clear after restarting the car (Model 3 and Model Y of 2020–2022)

Engine / equipment

Hydraulic brake control unit (HCU) wake-up wire: Tesla Model 3 and Model Y

Period mentioned

2020–2022

Symptoms

In rare cases, braking and stability control alerts appear on the instrument cluster and screen at power-on; they usually clear and everything works again after switching the car off and on.

Possible cause described

According to Tesla bulletins SB-22-33-003 (Model 3 with a heat pump and a lead-acid 12 V battery, model years 2020–2022, built in Fremont and Shanghai) and SB-22-33-006 (Model Y with a lithium-ion low-voltage battery, model years 2021–2022, Fremont and Shanghai), some cars left the factory without the hydraulic control unit (HCU) wake-up wire.

Check for the garage

If the brake or stability alerts appear at power-on and clear after a restart, ask Tesla service to check whether the bulletin applies: they retrofit that wire. If a brake warning does not clear, do not drive the car.

Cost cited in the source

No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.

Sources from the original database