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.
Forward Collision Warning (FCW) systems are designed to alert you to a potential crash and, in many vehicles, work hand-in-hand with automatic emergency braking. When FCW malfunctions—false alarms, missed warnings, or a system that keeps shutting off—it’s more than an inconvenience. It can undermine your confidence behind the wheel and raise real safety concerns. If you’re in California and your FCW issues persist under warranty, California’s Lemon Law may offer remedies, depending on the facts of your situation.
How California Lemon Law Covers Forward Collision Warning
California’s Lemon Law (the Song-Beverly Consumer Warranty Act) generally applies when a manufacturer or its authorized dealership can’t repair a defect that substantially impairs the vehicle’s use, value, or safety within a reasonable number of attempts while the car is under the manufacturer’s warranty. FCW problems frequently fall into the “safety” category because the system is meant to prevent or mitigate collisions. Examples include warning chimes that never sound, continuous false alerts that distract drivers, a dashboard message that disables FCW/AEB, or braking that triggers unexpectedly.
The law includes a presumption period—often discussed as the first 18 months or 18,000 miles—where certain repair-attempt counts and days out of service can help show that a vehicle is a “lemon.” For instance, multiple attempts to fix the same safety-related FCW defect, or the car being in the shop for 30 or more cumulative days, can be part of that analysis. That said, this presumption is not the entire law; claims can still exist outside that window or without meeting those exact numbers. What matters is whether the defect persists under warranty and substantially impairs use, value, or safety.
Every FCW case is fact-specific. Some issues stem from software glitches or faulty sensors; others relate to camera misalignment after a windshield replacement or body repair. If the dealer has repeatedly performed FCW calibrations, software updates, or sensor replacements and the warnings remain unreliable, you may want to explore your rights. This page provides general information only. A consultation is essential to evaluate your circumstances and warranty history before determining potential options under California law.
Steps to Take: Track Forward Collision Warning Repairs
Start by documenting the problem. Note the date, time, speed, road conditions, weather, and what exactly the FCW did or did not do (for example, no alert when approaching stopped traffic, or repeated alerts on an empty road). If safe, capture short videos or photos of dashboard warnings. Keep a simple log that includes odometer readings and a brief description of each incident—you don’t need to be an engineer; plain-English descriptions help establish a pattern.
When you visit the dealer, describe the FCW symptoms clearly and ask the service advisor to put your complaint in the repair order in your own words. Request copies of all paperwork each time, including warranty repair orders, technician notes, the software versions installed, calibration printouts, and parts replaced. If the dealer cannot duplicate the problem on the first try, ask for a test drive with a technician so they can see the behavior, and verify that “customer states” language on the repair order accurately reflects your concern.
Continue to monitor after each repair. If FCW alerts remain inconsistent or the system continues to disable itself, return promptly and reference the prior repair orders. Check for recalls or technical service bulletins (TSBs) that mention your FCW or AEB system, and verify that any required calibrations (often needed after windshield or camera/sensor work) have been completed. If the vehicle spends significant time in the shop or undergoes multiple unsuccessful repair attempts, consider speaking with a California lemon law attorney to review your documentation, warranty status, and options. Remember, this is informational only and not legal advice—an attorney can assess your specific facts.
ZapLemon helps California drivers understand their rights when persistent defects—like Forward Collision Warning malfunctions—disrupt safety, use, or value. This article is for informational purposes only, is not legal advice, and reading it does not create an attorney-client relationship. Every situation is different, and outcomes can vary.
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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.