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.
Automatic Emergency Braking (AEB) is designed to detect obstacles and automatically apply the brakes to prevent or reduce the severity of a crash. When it works, it’s a powerful safety feature. When it acts up—braking for no reason, failing to engage, or triggering constant warnings—it can be scary, disruptive, and expensive. If you’re dealing with ongoing AEB problems in California, you may be wondering whether the state’s Lemon Law can help. This article explains the basics in plain language so you can better understand your options.
Malfunctioning Automatic Braking and California Lemon Law
AEB systems rely on sensors, cameras, radar, and the vehicle’s onboard software to make split-second decisions. Common issues include false-positive brakes (sudden, unexpected stops), failure to activate when a collision is imminent, dashboard warnings like “Front Collision System Unavailable,” or recurring sensor/calibration faults after repairs. These problems can show up in all kinds of driving—heavy traffic, rain or fog, near reflective surfaces, or even when passing large trucks.
California’s Lemon Law—part of the Song-Beverly Consumer Warranty Act—generally applies to new vehicles (and many used vehicles that are still under the manufacturer’s warranty) when a covered defect substantially impairs use, value, or safety and the manufacturer can’t fix it within a reasonable number of attempts. Safety-related defects like unreliable AEB can meet this “substantial impairment” test, especially when the issue persists despite repeated repairs or keeps the car out of service for long stretches. The law focuses on warranty coverage and the manufacturer’s repair opportunities, not just how frustrating the defect is.
If your AEB keeps malfunctioning, a few practical steps can help you protect your rights: keep every repair order and write down dates and symptoms; take screenshots or photos of dash warnings when safe to do so; note conditions (speed, weather, traffic) when the problem occurs; confirm your warranty status and any recalls or technical service bulletins (TSBs); and make sure the dealer clearly describes the AEB complaint on the repair invoice. If repairs drag on, ask the dealer or manufacturer for a case number and keep all communications in writing.
Does AEB Failure Qualify as a California Lemon?
Whether an AEB problem qualifies under the California Lemon Law depends on the facts. Relevant factors often include how many documented repair attempts the manufacturer has had, how many total days the vehicle has been out of service, whether the defect substantially affects safety, and whether the problem appears during the warranty period. A system that triggers sudden hard braking at highway speeds or repeatedly fails to engage in near-collision situations is more likely to be viewed as a serious safety concern than a one-time warning light that never returns.
Examples that may point to a qualifying pattern include multiple visits where the dealer “could not duplicate” the complaint but the issue keeps returning; recurring sensor replacements or “recalibrations” with no lasting fix; AEB shutoffs in normal weather; or software updates that improve things temporarily before the warnings and sudden braking return. Even if the dealer says the system is “operating as designed,” your consistent, documented experience of unsafe behavior matters—especially when corroborated by videos, data logs, or fault codes listed on your repair orders.
If your vehicle meets the legal criteria, potential remedies under California’s Lemon Law can include repurchase (buyback), replacement, or in some cases a cash settlement to keep the vehicle. The specific outcome depends on the circumstances and the law, and no result can be promised. Because the rules can be nuanced—particularly with advanced driver-assistance systems like AEB—it’s wise to speak with a California lemon law attorney who can review your documents, warranty, and repair history. ZapLemon can assess whether your AEB issues might qualify and explain your options.
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.