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.
If your car’s safety features glitch, shut off, or behave unpredictably, it’s not just annoying—it can be dangerous. In California, the Lemon Law may protect you when safety systems fail under warranty and repeated repair attempts don’t fix the problem. This article explains how the law generally applies to malfunctioning safety technology and what steps you can take to document issues and move forward.
What California Lemon Law Covers for Safety Systems
California’s Lemon Law (part of the Song-Beverly Consumer Warranty Act) applies to new and many used vehicles sold or leased with a manufacturer’s warranty. If a defect covered by warranty substantially impairs the use, value, or safety of the vehicle—and the manufacturer can’t repair it after a reasonable number of attempts—you may be entitled to a repurchase or replacement. Safety systems commonly involved in lemon cases include airbags and seatbelt pretensioners, anti-lock brakes (ABS), electronic stability control (ESC), collision mitigation and automatic emergency braking (AEB), lane-keeping and lane departure warning, adaptive cruise control, blind-spot monitoring, backup cameras, and related sensors and software.
A “reasonable number of repair attempts” depends on the facts. California has a legal presumption (not a guarantee) that can help consumers if certain conditions are met within the first 18 months or 18,000 miles, such as multiple repair attempts for the same issue or 30 or more cumulative days out of service. For defects that could cause death or serious bodily injury, fewer attempts may satisfy the presumption. Even if you’re outside those mile or time markers, you may still have rights under the warranty—the presumption simply makes some cases easier to prove.
Safety-system problems don’t always look like a complete failure. Many owners report intermittent warning lights, phantom braking, sudden deactivation of driver-assist features, steering or lane-keeping that “fights” the driver, sensor misalignment after minor bumps, camera freezes, or recurring software update loops. When these issues persist despite dealer repairs during the warranty period, they may qualify as a nonconformity. The key is showing the manufacturer had a fair chance to fix the issue and couldn’t resolve it.
What to Do if Your Car’s Safety Systems Malfunction
Start by documenting everything. Note dates, mileage, weather or road conditions, dashboard messages, and how the problem affects your ability to drive. Take photos or short videos of warning lights or erratic behavior when safe to do so. Keep copies of all repair orders and invoices—make sure the service advisor writes your exact symptoms (for example, “AEB activates on empty road at 45 mph” rather than “check brakes”) and includes mileage in and out.
Schedule repairs with an authorized dealer and ask for warranty coverage confirmation in writing. If the problem is intermittent, request a joint test drive so the technician understands the symptom, and ask the dealer to pull and attach diagnostic codes to the repair order. Check for recalls or technical service bulletins (TSBs), and avoid clearing codes or performing factory resets at home before service, as that can erase data the dealer needs to diagnose the issue.
If the issue continues after multiple attempts or your vehicle spends substantial time in the shop, consider speaking with a California lemon law professional to review your records and options. An attorney can explain how the law may apply to your situation, timelines for a manufacturer repurchase or replacement, and what additional documentation could help. Until you have personalized advice, focus on thorough recordkeeping, consistent dealership visits for the same defect, and communicating in writing with the manufacturer when possible.
ZapLemon helps California drivers understand their options when safety systems won’t stay fixed. This article is for general informational purposes only, is not legal advice, and does not create an attorney–client relationship. Results vary and depend on the specific facts and applicable law.
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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.