Lemon Law Criteria and Safety-Related Defects

If car problems keep sending you back to the dealership, you’re not alone—and you may be wondering whether California’s Lemon Law can help. This article explains, in plain English, how the law defines a “lemon,” what counts as a safety-related defect, and what to document while your vehicle is in and out of the shop. It’s designed for information only, so you can better understand your options and talk with a professional about next steps.

California Lemon Law Criteria Explained Simply

California’s Lemon Law—part of the Song-Beverly Consumer Warranty Act—protects consumers when a vehicle has a defect that the manufacturer can’t fix within a reasonable number of attempts. In general, the vehicle must be covered by a manufacturer’s warranty (new or Certified Pre-Owned) and the defect must “substantially impair” the car’s use, value, or safety. That can include anything from a transmission that repeatedly slips to an electrical issue that causes the car to stall or won’t let safety systems work properly.

People often ask, “How many repair attempts are ‘reasonable’?” California uses a helpful guideline called the Tanner presumption during the first 18 months or 18,000 miles: two or more attempts for a serious safety defect likely to cause death or serious bodily injury; four or more attempts for the same non-safety defect; or a total of 30 or more days out of service for repairs. Even if you don’t meet these exact numbers, you may still have a valid claim—these are guidelines, not strict cutoffs.

If your vehicle qualifies, potential remedies under the law can include a manufacturer buyback (repurchase) or a replacement vehicle, along with certain incidental costs like towing or rental expenses. There is usually a mileage offset for the use you received before the problem first appeared. Coverage can extend to used vehicles if the manufacturer’s warranty was still active, and certain business-use vehicles may also qualify. The key is to report problems promptly, let an authorized dealer attempt repairs, and keep thorough records.

Safety-Related Defects: Common Issues and What to Document

Safety-related defects are problems that raise the risk of accidents or injury. Common examples include brake failures or pulling, steering that locks or loses assist, airbag or seatbelt malfunctions, and electrical issues that cause smoke, burning smells, or sudden loss of power. Other red flags include engine stalling while driving, transmission slipping that prevents acceleration, fuel leaks or strong fuel odors, doors or latches that pop open, and malfunctioning advanced driver-assistance systems like automatic emergency braking or lane-keep assist.

Because safety issues can be intermittent, detailed documentation is essential. Each time a problem occurs, note the date, mileage, speed, weather, warning lights, sounds, and how the car behaved. If safe, take photos or short videos showing the symptom or dashboard messages. At the dealership, describe the concern in your own words and make sure it’s written on the repair order; don’t accept “no problem found” without your complaint being captured. Keep copies of all repair orders, parts invoices, tow slips, rental/ride-share receipts, and any communications with the dealer or manufacturer.

A few practical tips can strengthen your record: schedule service as soon as a safety issue appears, and use an authorized dealer so the manufacturer gets a fair chance to fix it. Ask for a loaner or rental if the vehicle is unsafe to drive or will be in the shop. Save recall notices and technical service bulletins you receive—recalls don’t automatically fix a lemon, but they help show the manufacturer knows about the problem. Finally, avoid modifications that could complicate diagnosis, and follow the maintenance schedule so the manufacturer can’t blame lack of care.