California Lemon Law and Vehicle Safety Feature Malfunctions

Modern cars rely on complex safety systems—airbags, anti-lock brakes, stability control, and advanced driver-assistance features like lane-keeping and automatic emergency braking. When these systems glitch, it’s not just annoying—it can be dangerous. This article explains, in plain language, how California’s Lemon Law treats safety feature malfunctions and what you can do to document issues for a potential claim. It’s educational information to help you spot patterns, preserve your rights, and know when it might be time to talk with a professional.

When Safety Features Fail: California Lemon Law 101

California’s Lemon Law (part of the Song-Beverly Consumer Warranty Act) generally requires automakers to repair defects covered by the manufacturer’s warranty that substantially impair the vehicle’s use, value, or safety. If the manufacturer or its authorized dealer can’t fix the problem after a reasonable number of attempts, the consumer may be entitled to remedies such as a repurchase or replacement. Safety-related issues often receive heightened attention because of the risk they pose, even if the car is still drivable.

Safety feature malfunctions can include an airbag warning light that won’t clear, ABS or stability control faults, a backup camera that goes black, blind-spot monitors that miss vehicles, “phantom braking” from the forward collision system, lane-keep assist that pulls the car off line, a steering assist failure, or an intermittent loss of power braking. Software-related bugs are increasingly common with ADAS-equipped vehicles and can be just as significant as mechanical defects, especially when they create unpredictable behavior on the road.

California’s Lemon Law includes a “presumption” period—generally within 18 months of delivery or 18,000 miles, whichever comes first—where certain repair patterns can help establish that a vehicle is a lemon. As a general example, two or more repair attempts for a defect likely to cause serious injury or death, four or more attempts for other issues, or 30 or more total days out of service may trigger the presumption. The law can apply to new vehicles and many used or certified pre-owned vehicles that are still under the manufacturer’s warranty. Every situation is fact-specific, so documentation and timing matter.

How to Document Safety Malfunctions for Your Claim

Start by tracking what you experience in real time. When it’s safe to do so, note the date, mileage, speed, weather, road conditions, and exactly what the car did (for example, “sudden brake application on a clear highway with no vehicle ahead; AEB warning flashed”). Photos or short videos of warning lights, dash messages, and infotainment errors can be helpful. Check for open recalls on the NHTSA website and ask the dealer whether there are technical service bulletins (TSBs) related to your symptoms.

At the dealership, describe symptoms—not just a suspected cause—so the concern is captured accurately on the repair order. Request a copy of every repair order and final invoice, including the “concern, cause, and correction,” dates in and out, mileage in and out, and all diagnostic trouble codes or software version numbers. If you receive a loaner or rental, make sure the dates are written on the paperwork so your “days out of service” are clear. Keep texts and emails with the service advisor and save receipts for towing or related costs.

Build a simple timeline listing each visit and the results. Avoid clearing codes or performing aftermarket modifications that could complicate diagnostics. If the problem persists after multiple visits, you can contact the manufacturer’s customer care line and follow their escalation process—ideally in writing or by certified mail so you have a record. Because safety issues can be nuanced and the law is technical, consider consulting a California lemon law attorney to review your documents and discuss options. ZapLemon can evaluate your paperwork and help you understand next steps based on your specific facts.