EV Sudden Power Loss (ICCU & Drive-Unit Failures)

Several distinct failures produce the same terrifying symptom. On some EVs, an integrated charging control unit (ICCU) manages charging and keeps the 12-volt battery topped up; when it fails, the car warns of limited power, then progressively loses the ability to move. On others, drive-unit or inverter software commands a high-voltage shutdown, cutting propulsion. Either way, the driver can be stranded.

These defects are especially serious because they can strike without warning and at speed. They are also frequently stubborn: owners report the failure recurring after a control unit is replaced or software is updated, and replacement parts have been backordered for weeks, leaving the car undrivable in the meantime.

A defect that can cut power while you're driving is a serious safety defect, and California treats those more strictly — fewer failed repair attempts are needed to qualify. If your EV keeps losing power, or sat out of service waiting for parts, you may be entitled to a buyback, replacement, or cash settlement, with the manufacturer paying your fees.

California's Lemon Law (the Song-Beverly Act) applies when a substantial defect can't be repaired after a reasonable number of attempts, or when your vehicle has been out of service for 30 or more cumulative days. For serious safety defects, fewer failed attempts are required.

If your vehicle qualifies, you may be entitled to a buyback (a refund of what you've paid, minus a mileage offset), a replacement vehicle, or a cash-and-keep settlement. The manufacturer pays your attorney fees on a successful claim — so pursuing your case costs you nothing out of pocket.