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.
Modern cars are rolling computers, and a bad software update can sideline a vehicle just as surely as a failing transmission. If your car keeps glitching after over‑the‑air (OTA) or dealer‑installed updates, you may be wondering whether California’s Lemon Law can help. Below, we explain how software issues fit into California Lemon Law coverage and what to document before you reach out to ZapLemon. This article is for general information only and isn’t legal advice.
Do California Lemon Laws Cover Software Failures?
California’s Lemon Law (the Song-Beverly Consumer Warranty Act) generally applies to defects covered by the manufacturer’s warranty that substantially impair the vehicle’s use, value, or safety. That includes software and firmware controlling key systems—engine and battery management, braking and steering assists, airbags, ADAS features, infotainment displays tied to backup cameras, and charging systems in EVs. If a software defect persists and the manufacturer cannot repair it after a reasonable number of attempts, the law may provide remedies such as a repurchase or replacement, or a cash settlement—depending on the circumstances and applicable law.
Software issues often look different from traditional mechanical problems, but the legal lens is similar: the defect must be covered by warranty and must materially affect your vehicle. Examples include an update that causes sudden loss of power or stalling, a failed ADAS calibration that triggers constant lane-keep or braking warnings, an infotainment crash that knocks out the backup camera, or a battery management update that drastically reduces range or charging capability. Repeated “reflash” attempts, module replacements, or OTA patches that fail to resolve the issue can count as repair attempts, and days your car sits at the dealership awaiting diagnostics or software downloads can count as days out of service.
What counts as a “reasonable number” of attempts depends on the facts. California’s Lemon Law has helpful presumptions within the first 18 months or 18,000 miles (for example, two or more attempts for a defect likely to cause death or serious injury, four or more attempts for other warranty defects, or 30+ cumulative days out of service), but you can still have a claim outside of those presumptions if the defect and repair history meet the law’s standards. Keep in mind that aftermarket modifications, rooted devices, or unsupported software changes can complicate coverage, and each situation is highly fact-specific. A consultation is the best way to understand how the law could apply to your particular repair history.
What to Document and When to Contact ZapLemon
Good records make strong cases. Save every repair order and invoice, even when the dealer writes “could not duplicate concern.” Make sure each repair order describes your complaint in your own words, lists the software/module updated (e.g., PCM, TCU, BMS), shows the software version or campaign ID, and includes mileage in and out. If you receive OTA updates, take screenshots of update prompts, version numbers, and completion/failure messages. Videos of the problem (e.g., a rebooting screen, warning lights, sudden power loss) can also help.
Track time without your vehicle. Note dates your car is at the dealership, any parts or engineering “case” delays, and whether you were provided a loaner. Ask the service department to note technical service bulletins (TSBs), recall numbers, field engineer visits, or “STAR cases” associated with your VIN. If your vehicle is an EV or plug‑in hybrid, record range changes, charging failures, and charging session errors before and after updates. Keep your warranty booklet handy and confirm whether your issue arose during the warranty period, even if it continues afterward.
Consider contacting ZapLemon if you’ve had multiple unsuccessful repair attempts for the same software-related defect, your vehicle has been out of service for 30 or more total days, or the issue raises safety concerns (for example, loss of power steering assist or braking support). It’s also smart to reach out if the dealer says the problem is “normal” but it persists, or if updates fix the issue only temporarily before it returns. A quick consultation can help you understand timelines, documents to gather, and your options under California law—all without promises or guarantees about any outcome.
Software update failures can be more than frustrating—they can affect the safety, value, and everyday use of your vehicle. California Lemon Law may cover qualifying software defects when the manufacturer cannot repair the problem within a reasonable number of attempts during the warranty period. If you’re dealing with repeated software glitches, start documenting today and learn where you stand.
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.