Intermittent car problems—issues that come and go—are among the most frustrating for California drivers. They can be hard to reproduce at the dealership, yet they still affect safety, value, and day‑to‑day use. This article explains, in plain language, how California’s Lemon Law looks at intermittent defects and what kinds of proof help your claim. It’s general information for consumers and not legal advice. If you need guidance for your situation, a consultation with ZapLemon can help you understand your options.
How California Lemon Law Treats Intermittent Problems
California’s Lemon Law (the Song-Beverly Consumer Warranty Act) applies when a vehicle has a defect covered by the manufacturer’s warranty that substantially impairs the car’s use, value, or safety—and the manufacturer or its authorized dealer can’t fix it after a reasonable number of attempts. The law does not require a defect to happen every single drive. If your car stalls once a week, the transmission slips sporadically, the infotainment system reboots randomly, or warning lights flicker on and off, those intermittent issues can still qualify as a “nonconformity” if they meaningfully affect use, value, or safety.
What counts as a “reasonable number” depends on the facts. California’s Tanner Consumer Protection Act creates helpful guidelines within the first 18 months or 18,000 miles: two or more repair attempts for a serious safety defect that could cause death or serious bodily injury; four or more attempts for other defects; or more than 30 total days out of service for repairs. Intermittent problems often lead to “no problem found” or “cannot duplicate” notes on repair orders. Even so, those visits still generally count as repair opportunities if you clearly reported the symptoms.
Timing matters. Lemon Law protections typically hinge on whether the problem first arose—and the repair attempts occurred—while the vehicle was under the manufacturer’s warranty. New vehicles, many certified pre‑owned vehicles, and used vehicles sold with a manufacturer’s warranty may qualify. California also provides an implied warranty of merchantability (usually up to 12 months/12,000 miles from sale for new purchases), and time spent in the shop can extend warranty periods in some circumstances. Because intermittent defects can evolve, it’s wise to address them early and document each visit.
Proof That Counts: Repairs, Records, and Warranty
Your paper trail is powerful. Save every repair order and make sure each one lists the exact symptom you reported (for example, “vehicle lost power merging; happened three times this month; check engine light briefly flashed”). Ask the service advisor to include dates, mileage, diagnostic trouble codes, and results of any test drives. If the dealer says “could not duplicate,” that still shows you gave the manufacturer a chance to fix the issue—important for intermittent problems.
Keep your own log. Note the date, mileage, weather, speed, and conditions when the defect appears. Short phone videos of the symptom—stalling, screen flicker, harsh shift, warning chime—can help a technician reproduce the problem. If it’s safe, offer to demonstrate the issue on a test drive with the technician. Check for recalls and Technical Service Bulletins (TSBs) related to your symptom; while TSBs aren’t recalls, they can show a known pattern the dealer should address under warranty.
Verify your warranty status before each visit. Intermittent problems can straddle warranty milestones, so it’s important to report and document the issue while coverage is active. Take the car to an authorized dealership for warranty repairs, avoid modifications that could complicate diagnosing the defect, and keep all maintenance receipts. If the vehicle sits at the dealer for multiple days, ask for written confirmation of in‑shop dates—those days may count toward California’s “30 days out of service” guideline. If you feel stuck in repeat visits, consider speaking with ZapLemon to understand potential next steps before you request a buyback or replacement from the manufacturer.
Attorney Advertising. This article is for informational purposes only and is not legal advice. Reading it does not create an attorney‑client relationship with ZapLemon, and past results do not guarantee future outcomes. Laws and deadlines can change, and your facts matter. If you believe your vehicle may qualify as a lemon or you’re facing intermittent problems that won’t go away, contact ZapLemon for a consultation at [phone number] or visit [website]. We can review your records, explain your options, and help you decide what to do next.