TL;DR: Under California lemon law requirements, a vehicle generally qualifies as a lemon when it has a warranty defect that substantially impairs its use, value, or safety, and the manufacturer cannot fix it after a reasonable number of attempts. Repeated repairs or more than 30 days in the shop within 18 months or 18,000 miles create a presumption in your favor.
The check engine light comes back on the day after the third repair. The service advisor shrugs. The car is still under warranty, so they will “keep trying.” At some point, every owner of a problem car asks the same question: when does this stop being my problem and start being the manufacturer’s?
California’s lemon law, part of the Song-Beverly Consumer Warranty Act, answers that question. Here is what the law actually requires.
California Lemon Law Requirements at a Glance
Your vehicle may qualify if:
- It was covered by the manufacturer’s express warranty when the problem appeared.
- It has a defect covered by that warranty.
- The defect substantially impairs the vehicle’s use, value, or safety.
- The manufacturer or its authorized dealers had a reasonable number of attempts to fix it.
- The defect still was not fixed.
If those requirements are met, Civil Code 1793.2(d)(2) requires the manufacturer to either replace the vehicle or refund the purchase price, at the buyer’s choice, minus a deduction for the miles driven before the first repair attempt.
What Counts as a Substantial Defect
A substantial defect is one that affects how the car works, what it is worth, or whether it is safe. Common examples include:
- Brake, steering, or airbag problems.
- Engine or transmission failures.
- Electrical problems that cause stalling or loss of power.
- Persistent warning lights tied to a real malfunction.
- Water leaks or electronics failures that keep coming back.
A loose piece of trim or a small rattle usually does not qualify on its own. Keep every repair order. They are the backbone of any lemon law claim, because they show the date, the mileage, the complaint, and what the dealer did.
The 18-Month or 18,000-Mile Presumption
Civil Code 1793.22(b), sometimes called the Tanner Act, creates a presumption that the manufacturer had a reasonable number of repair attempts if, within 18 months of delivery or 18,000 miles, whichever comes first:
| Situation | Repair attempts needed |
|---|---|
| A defect likely to cause death or serious bodily injury | 2 or more attempts, and you directly notified the manufacturer |
| The same defect, any type | 4 or more attempts, and you directly notified the manufacturer at least once |
| Any warranty defects | More than 30 total days out of service for repairs |
The direct-notice requirement applies only if the manufacturer clearly disclosed it in the warranty or owner’s manual.
This is a presumption, not a deadline. A vehicle can still qualify as a lemon after 18 months or 18,000 miles if the defect appeared while the warranty was in effect and the manufacturer failed to fix it within a reasonable number of attempts. The presumption simply makes the case easier to prove.
Using the manufacturer’s arbitration program first
Under Civil Code 1793.22(c), if the manufacturer has a state-certified dispute resolution program and properly told you about it, you must use that program before relying on the presumption. The California Department of Consumer Affairs oversees these certified programs.
Used and Certified Pre-Owned Cars After Rodriguez
For years, many used-car buyers with time left on the original factory warranty were treated as protected under the lemon law’s “new motor vehicle” rules. In Rodriguez v. FCA US LLC (2024), the California Supreme Court held that a used car sold with the balance of the original new-car warranty is not a “new motor vehicle” under the Song-Beverly Act.
That decision narrowed protection for many used and certified pre-owned buyers. Some may still have warranty claims, depending on what warranties came with the sale, so the details of your purchase paperwork matter more than ever.
2025 Rule Changes: Notice Letters and Deadlines
Two laws, AB 1755 and SB 26, created new lemon law procedures in Code of Civil Procedure 871.20 and the sections that follow. These rules apply only to manufacturers that elect to be governed by them, and that election lasts five years. The Department of Consumer Affairs publishes the list of participating manufacturers.
For vehicles from a participating manufacturer:
- A lawsuit generally must be filed within one year after the express warranty expires, and no later than six years after the vehicle was delivered, with certain periods paused, such as time the vehicle spends in repair (CCP 871.21).
- Before seeking civil penalties, the buyer must send the manufacturer written notice at least 30 days before filing suit. The manufacturer then has 30 days to offer a replacement or refund and 60 days to complete it.
For manufacturers that did not opt in, the older rules continue to apply, including the four-year limitations period that California courts have applied to these warranty claims.
What a Lemon Law Buyback Pays
A refund under Civil Code 1793.2(d)(2) generally includes the price you paid, plus charges like taxes, registration, and finance charges, plus incidental damages, minus an offset for use. The offset is calculated from the miles driven before you first brought the car in for the defect. If a manufacturer willfully violates the law, Civil Code 1794(c) allows a civil penalty of up to twice your actual damages, and Civil Code 1794(d) lets a successful buyer recover attorney fees and costs from the manufacturer.
Final Thoughts
A car that keeps breaking down wears on you in ways that are hard to explain to people who have not lived it. The missed work, the rides you have to beg for, the worry every time a light flickers on the dash. Wanting out of that is not impatience. It is reasonable, and the law recognizes it.
Pyramid Legal: Lemon Law Help in Pasadena
If your new vehicle keeps going back to the dealer for the same problem, Pyramid Legal can review your repair orders, explain whether your vehicle meets California’s lemon law requirements, and help you take the next step. Visit us at 1055 E Colorado Blvd, Suite 500, Pasadena, CA 91106, call 818-946-0763, or learn more about lemon law claims in California.
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Already offered a buyback? See how a California lemon law buyback is calculated.
This article is general information about California lemon law requirements. It is not legal advice about your specific matter and does not create an attorney-client relationship.
Frequently Asked Questions
Does California lemon law apply to leased vehicles?
Yes. The Song-Beverly Consumer Warranty Act covers new motor vehicles that are leased as well as purchased. If a leased vehicle qualifies as a lemon, the remedy is generally a refund of what you paid toward the lease, minus an offset for use, rather than the full purchase price.
Do I have to pay a lawyer out of pocket for a lemon law claim?
Usually not. Civil Code 1794(d) lets a buyer who wins recover attorney fees and costs from the manufacturer, which is why many lemon law attorneys handle these cases without charging the consumer up front. Ask about fee terms before you sign any agreement.
What if the dealer says it cannot find anything wrong?
Make sure every visit is documented on a repair order, even when the dealer finds no problem, and describe the symptoms the same way each time. A “could not duplicate” visit can still count as a repair opportunity, and photos or videos of the problem help prove it is real.
Can I still file if I already traded the car in or sold it?
Possibly. Selling or trading in the vehicle does not automatically end a lemon law claim, but it can make proving the defect and calculating damages more complicated. Keep all repair orders, sale documents, and payment records, and get advice before or soon after the sale.
