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.
Today’s new cars are rolling computers. When software behaves badly—glitchy touchscreens, crashing driver-assist systems, failed over-the-air updates, or vehicles that refuse to start after a firmware patch—the ownership experience can quickly go from exciting to frustrating. In California, persistent software defects can qualify a vehicle as a “lemon” under certain circumstances. Below, we explain when software bugs may trigger lemon law protections and how ZapLemon works with consumers to pursue software defect claims.
When Software Bugs Make a New Car a Lemon
Modern vehicles run on millions of lines of code. Software issues can show up as freezing infotainment screens, blank backup cameras, false collision warnings, flickering digital clusters, or sudden loss of Bluetooth and CarPlay. In EVs and hybrids, bugs may surface as unpredictable range readings, charging failures, phantom battery drain, or thermal management warnings. Advanced driver-assistance systems (ADAS) can misbehave too—unexpected lane-keeping inputs, cruise control that disengages without warning, or automatic emergency braking that overreacts.
Under California’s lemon law, a new vehicle may be considered a lemon if a defect covered by the manufacturer’s warranty is not fixed after a reasonable number of repair attempts, or if the car spends a significant amount of time out of service for repairs. Software problems count—there’s no requirement that the defect be “mechanical.” What matters is whether the issue substantially impairs the vehicle’s use, value, or safety, and whether the manufacturer has had a fair chance to repair it. Temporary improvements after an update don’t erase a history of repeated failures, and intermittent bugs still matter if they recur.
Documentation is critical. Keep every repair order, including visits where the dealer writes “could not duplicate” or “no codes found.” Ask the service advisor to record the exact software/firmware version, calibration IDs, and any applied patches. Note dates, mileage, and symptoms, and capture photos or video when the problem occurs (for example, a blank reversing camera or error messages after an OTA). Save communications from the manufacturer and the automaker app showing update attempts, failed downloads, or remote diagnostics. Days in a loaner or rental car due to repairs should also be documented.
How ZapLemon Helps with Software Defect Claims
Software defect cases often turn on the details. ZapLemon reviews your repair timeline, warranty coverage, service records, and any OTA logs or app screenshots to understand what happened and when. We look for patterns—multiple updates for the same concern, repeated “cannot verify” notes despite clear symptoms, or cycling between versions that never resolve the problem. We also consider safety implications, like camera failures or ADAS malfunctions, which can change how the law may apply.
Because software can be reset or overwritten, preserving evidence matters. We can help you request complete repair histories, confirm software versions installed at each visit, and determine whether OTA fixes count as repair attempts based on how they were initiated and documented. When appropriate, we may recommend steps such as an expert inspection or a data download to capture error codes and logs before further updates occur. Every situation is different, and outcomes depend on the specific facts and the law.
If you’re dealing with repeated software glitches, there are practical steps you can take now: keep a simple log of dates, mileage, and symptoms; ask for detailed repair orders; verify whether any recalls or technical service bulletins apply; and avoid performing optional resets that may wipe useful data before the issue is documented. If you believe your vehicle may qualify as a lemon, contact ZapLemon to discuss your situation. A consultation is necessary for legal advice tailored to you, and we’re here to help Californians understand their options.
This article provides general information about California lemon law and software defects and is not legal advice. Reading this page does not create an attorney-client relationship with ZapLemon. Legal outcomes vary based on facts and applicable law. If you think your vehicle may be a lemon or you have questions about software-related defects, contact ZapLemon to request a consultation via our website or by phone. We serve consumers in California and can discuss your options after reviewing your records and warranty information.
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.