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.
Blind spot warning systems are supposed to make driving safer, not more stressful. When the alerts misfire, stay silent, or constantly glitch, the problem can affect your confidence behind the wheel and your vehicle’s value. This article explains how California’s Lemon Law treats recurring blind spot warning issues, what “reasonable repair attempts” means, and practical steps you can take to protect your rights—without offering legal advice. If your car keeps having blind spot problems, a quick conversation with a professional can help you understand your options.
Blind Spot Warning Issues Under California Law
Blind spot warning (also called blind spot monitoring or BSD/BSW) is part of an advanced driver-assistance system (ADAS). These systems use radar, cameras, and software to detect vehicles in adjacent lanes and alert you with lights or sounds. Common problems include constant false alarms, failure to detect vehicles, alerts stuck on, indicators that flicker or go dark, and warnings that stop working after repairs like bumper replacements or windshield work. Intermittent failures—especially those that only happen on the highway or in rain—are also common and can be difficult to reproduce at the shop.
Under California’s Song-Beverly Consumer Warranty Act (the “California Lemon Law”), a defect may qualify if it substantially impairs the vehicle’s use, value, or safety, and the manufacturer (or its authorized dealer) can’t fix it after a reasonable number of attempts during the warranty. Because blind spot alerts relate to collision avoidance, repeated failures can be viewed as a safety concern. California also has a “lemon law presumption” during the first 18 months or 18,000 miles with certain thresholds (for example, multiple repair attempts for the same issue or 30 or more total days out of service). Even if you’re outside the presumption window, you may still have rights under the law.
For many owners, the problem is not just a one-time sensor fault. Repairs can involve software updates, sensor calibration after body work, replacing radar modules, checking wiring or moisture intrusion in the bumper, and ensuring the correct bumper cover is installed (some aftermarket parts can block radar). If you keep returning for the same blind spot issue—or the fix only lasts a week—your records will matter. Keep every repair order, note what the vehicle did, when it happened, and whether conditions like rain or speed seem to trigger it. Video clips of the malfunction can help a technician reproduce the problem.
How Lemon Law Applies to Faulty Blind Spot Alerts
Lemon Law cases turn on warranty coverage and repair history. If your vehicle is under the manufacturer’s new car warranty or a certified pre-owned warranty, and the blind spot system has been subject to repeated, unsuccessful repairs, you may be eligible for remedies such as repurchase or replacement—depending on the facts and the law. The key phrase is “reasonable number of repair attempts.” For safety-related defects, fewer attempts may be considered reasonable, but it’s fact-specific. Time out of service also matters: if your car has spent many days at the dealer for diagnostics, parts delays, or calibration, those days count.
What should you do if you suspect a lemon? Consider these general steps:
- Schedule warranty service promptly and describe the symptoms clearly.
- Ask the dealer to note your exact complaint on the repair order and request copies each visit.
- Save all emails and texts with the dealer; track days your car is unavailable.
- Check for technical service bulletins (TSBs) or recalls; sometimes a known software update or sensor shield fix exists.
- Avoid disabling the system yourself; let the dealer document the problem under warranty.
These steps won’t guarantee any outcome, but they can create a clean record if you later explore Lemon Law options.
It’s also wise to review your warranty booklet and note any deadlines. California generally has time limits for warranty claims, and some manufacturers offer arbitration programs. Whether you’re driving a new SUV with radar sensors behind the rear bumper or a sedan with camera-based alerts in the side mirrors, the legal analysis focuses on the same core questions: Is the defect covered by warranty? Has the manufacturer had a fair chance to fix it? Does it materially affect use, value, or safety? A short consultation can help you understand how these rules apply to your situation.
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.