Vehicle technology now runs on millions of lines of code, from infotainment and connectivity to driver-assistance and battery management systems. When those systems glitch, freeze, or misfire, the problem isn’t just annoying—it can affect the use, value, or safety of the car. This article explains how California’s Lemon Law approaches software-related defects and what practical steps you can take to protect your rights.
How California Lemon Law Treats Software Bugs
California’s Lemon Law (part of the Song-Beverly Consumer Warranty Act) generally covers defects that occur during the manufacturer’s warranty and substantially impair the vehicle’s use, value, or safety. That protection doesn’t stop at hardware. Software is part of the vehicle, so recurring bugs—like infotainment systems that constantly reboot, driver-assistance features that behave unpredictably, or energy management software that causes stalling or severe range loss—can be treated as defects if they rise to that “substantial impairment” level.
The law requires the manufacturer to get a “reasonable number” of opportunities to fix the issue. California has a helpful guideline (often called the “lemon law presumption”) in the first 18 months or 18,000 miles: the vehicle may qualify if, for example, a serious safety defect has been subject to 2 or more repair attempts, a non-safety defect has 4 or more attempts, or the car has been out of service for repairs for a total of 30 or more days. For modern cars, over-the-air updates, remote diagnostics, and in-dealer reprogramming can all count as repair attempts when the manufacturer uses them to address the specific complaint.
If a vehicle meets the legal standards, available remedies can include a repurchase, replacement, or a negotiated “cash and keep” resolution, depending on the facts and the law. Not every glitch qualifies, and software issues can be complex—manufacturers sometimes claim a problem is “normal” or “within specifications.” Used and leased vehicles can also be covered if the manufacturer’s warranty was in effect during the repair attempts. Because every case is fact-specific and deadlines may apply, speaking with a professional can help you understand your options.
Keep Records and Warranty Tips for Software Bugs
Start a simple log the first time the bug appears. Note the date, mileage, weather, and what you were doing when the issue occurred (e.g., “highway cruise, adaptive cruise engaged; sudden braking alert”). Save photos or short video clips of error messages, frozen screens, or malfunctioning features, and jot down software versions if the screen shows them. This timeline helps show a pattern and makes your service visits more effective.
When you visit the dealer, describe symptoms in plain, repeatable terms and ask that your exact complaint be written on the repair order. Request copies of all repair paperwork, including test results, software patch numbers, module reprogramming records, and any technical service bulletins (TSBs) applied. If the dealer says “no problem found,” ask for the steps they took to verify the issue and ensure that note appears on the invoice; if the fix was an over-the-air update, request documentation showing the date, version, and purpose of the update.
Check your warranty booklet to confirm coverage for electronic control modules, infotainment units, and high-voltage battery management systems. Look up recalls and TSBs that may match your symptoms, and avoid performing factory resets or deleting logs before a service visit (those details can help technicians and preserve evidence). Whenever possible, use an authorized dealer for warranty repairs, get a case number if the manufacturer offers one, and keep all correspondence. If the problem keeps coming back, consult a professional to review your records and discuss next steps.
This article is for general informational purposes only, is not legal advice, and reading it does not create an attorney–client relationship. Laws change, facts matter, and outcomes cannot be guaranteed. If you believe your vehicle may qualify as a lemon due to software-related defects, contact ZapLemon for a consultation at [phone number] or visit [website]. We’re here to help you understand your rights and options under California law.