Start with the records. Repair orders, warranty documents, mileage, and days out of service are more useful than general assumptions about whether a vehicle qualifies.
Electric vehicles rely on software just as much as hardware. Over-the-air updates can improve performance, fix bugs, and add features—yet sometimes an update creates new problems or makes an old issue worse. If you’re in California and your EV keeps misbehaving after software updates, you may wonder whether the California Lemon Law can help. This article explains, in plain language, how defective EV software updates fit into the lemon law framework and what practical steps you can take to protect your rights.
Can EV Software Updates Make Your Car a Lemon?
Modern EVs are essentially “computers on wheels.” Manufacturers regularly push over-the-air (OTA) updates to adjust battery management, fix infotainment glitches, recalibrate driver-assistance features, and more. When these updates work, they’re convenient. When they don’t, they can trigger new defects—ranging from minor annoyances to serious safety concerns—and leave owners stuck in a cycle of updates and resets without a lasting fix.
Common examples include reduced range after an update, slower DC fast-charging speeds, charging failures that interrupt at-home or public sessions, sudden loss of driver-assistance functions, braking or acceleration anomalies tied to software, persistent warning lights, phantom battery drain, freezing or blacked-out infotainment screens, connectivity failures affecting navigation or phone integration, and, in rare cases, vehicles that won’t start after an OTA installation. Even if your EV remains drivable, recurring software faults can substantially impair the vehicle’s use, value, or safety.
Under California’s Lemon Law (part of the Song-Beverly Consumer Warranty Act), a vehicle may qualify as a “lemon” when a warranty-covered defect persists after the manufacturer (or its authorized dealer) has had a reasonable number of chances to fix it, or when the vehicle is out of service for an extended period due to repairs. Software-related defects are not treated differently just because they come from an update rather than a broken part. What matters is whether the issue is covered by warranty, is substantial, and hasn’t been repaired within a reasonable timeframe—even if the “repair attempts” are OTA updates, module reprogramming, or software patches.
How California Lemon Law Applies to EV Update Failures
California’s Lemon Law protects consumers when a new or used vehicle sold with a manufacturer’s warranty has a defect that the manufacturer or its authorized repair facility cannot fix after a reasonable number of attempts. For EVs, that includes software defects introduced or unresolved by OTA updates. If an update causes the vehicle to lose range, disables charging, or creates safety-related malfunctions, those issues may be “nonconformities” under the warranty. Importantly, a software patch or update pushed by the manufacturer can count as a repair attempt, just like an in-shop module replacement or reflash.
California has a “presumption” that can simplify proof in some cases: within the first 18 months or 18,000 miles—whichever comes first—a vehicle may be presumed a lemon if (1) the same problem has been subject to repair four or more times, (2) a safety-related issue has been subject to repair two or more times, or (3) the vehicle has been out of service for repair for 30 or more total days. Even if you fall outside that window or don’t meet these exact numbers, you may still have rights under the law—the presumption is a helpful guideline, not a strict requirement. With software, “out of service” can include extended time waiting for a software fix, repeated dealer visits for reprogramming, or periods when the car is not safely usable due to a known defect.
Practical steps can make a big difference. Keep detailed records: dates of each update, software version numbers, symptoms before and after, screenshots of update notes or error messages, and all service or repair orders. If the dealer performs a reflash or applies a TSB (technical service bulletin), ask that the document note the software version and the precise correction attempted. Check your warranty booklet to confirm coverage for software and connectivity components. Avoid self-help fixes that could affect warranty coverage, and report safety issues promptly. If problems persist, consider consulting with a lemon law attorney to evaluate your situation. To discuss your EV’s software issues and how the law may apply, contact ZapLemon for a consultation.
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Attorney advertising. General information is not legal advice and does not create an attorney-client relationship. No result is promised or guaranteed.