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 as much as hardware. When an over‑the‑air update breaks your charging, reduces range, or causes safety features to glitch, it can feel like you’re beta‑testing a product you already paid for. If these problems keep coming back despite dealer visits and “fixes,” you may be wondering whether California’s Lemon Law can help.
Below, ZapLemon explains how California Lemon Law applies to unreliable EV software updates and what steps you can take to protect your rights. This article is for general information only and isn’t legal advice. If you want guidance about your situation, a consultation is the best next step.
How California Lemon Law Covers Unreliable EV Updates
California’s Lemon Law (part of the Song‑Beverly Consumer Warranty Act) generally covers new vehicles sold or leased in California that have defects the manufacturer can’t fix after a reasonable number of attempts while under warranty. That protection can also extend to used vehicles that are still under the manufacturer’s new‑car warranty or a certified pre‑owned warranty. In today’s EVs, software is not just a convenience; it’s integral to how the car charges, manages the battery, drives, and keeps you safe—so software defects can count.
“Unreliable EV software updates” can include repeated failed downloads, updates that disable features (like DC fast charging, driver‑assist cameras, or the infotainment screen), sudden loss of range after an update, frequent reboots, phantom braking from ADAS glitches, or charging systems that become finicky only after a patch. If a defect like this substantially impairs the vehicle’s use, value, or safety, and the manufacturer can’t fix it after reasonable attempts, the Lemon Law may apply. The law looks at the defect and the repair history, not just whether a part is mechanical or digital.
California also has a “presumption” that can make a claim easier to prove if certain things happen in the first 18 months or 18,000 miles: for example, 2 or more repair attempts for a serious safety issue, 4 or more attempts for the same problem, or 30 or more cumulative days out of service. Even if you’re outside that window, you may still qualify; you just won’t get the benefit of the presumption. Remedies in successful cases can include repurchase (buyback), replacement, or other relief allowed by law—but outcomes vary, and the specifics depend on your facts.
Steps to Take When EV Software Updates Fail Repeatedly
First, document everything. Note the date and time of each update, any error messages, and how the problem affects driving (e.g., “fast‑charging dropped from 150 kW to 40 kW,” “lane‑keep toggles off after restart,” or “screen freezes and HVAC stops”). Take photos or short videos, and save screenshots of update notes. Each time you visit the dealer, ask for a detailed repair order that lists your complaints, the technician’s findings, software versions flashed, modules replaced, and any test results. Keep all invoices, even if the visit is “no problem found.”
Second, work through the warranty process. Schedule service with an authorized dealer and describe the software issue in plain terms. If a fix is promised via a future patch, ask the dealer to note that in writing. If the same issue keeps returning, make sure each visit is separately documented—repeat visits for the same symptom are important. You can also ask the service department to check for technical service bulletins (TSBs), recalls, and newer calibration files related to your vehicle’s VIN and software level. If your vehicle is becoming unsafe (for example, intermittent loss of power steering or braking assist), say so clearly at drop‑off.
Third, track the “days out of service” and consider escalation. If your EV sits at the dealer waiting on parts or software access, those days count. If the problem persists after multiple attempts, contact the manufacturer through the escalation channel listed in your warranty booklet and request a case number. Continue to use the vehicle safely and avoid workarounds that could create risk. At this point, many consumers choose to talk with a lemon law attorney to understand options under California law. A consultation can help you evaluate whether your repair history may meet legal standards and what next steps make sense for you.
Software updates are part of EV ownership, but they shouldn’t repeatedly break core functions or compromise safety. If your vehicle keeps cycling through failed updates and the manufacturer can’t fix the issue under warranty, California’s Lemon Law may offer protections. Every case is different, and timelines, mileage, and documentation can all matter.
Need a case-specific review?
Use the case-review form to share the warranty, repair orders, dates, mileage, and supporting facts an attorney would need to evaluate, or call (844) 927-5366.
Attorney advertising. General information is not legal advice and does not create an attorney-client relationship. No result is promised or guaranteed.