The short version
As of July 6, 2026, if your vehicle's manufacturer opted in to California's new lemon law procedures, you must file suit within one year after the express warranty expires, and in no event later than six years after the vehicle was originally delivered. That is a dramatic cut from the old framework, under which consumers generally had four years. If your manufacturer did not opt in, the old rules still apply to your claim. Because a mandatory 30-day pre-suit notice must precede any suit seeking civil penalties against an opted-in manufacturer, the practical deadline is even earlier than the statute suggests. Act at least 60 to 90 days before any deadline you calculate.
How long do I have to file a lemon law case in California?
Against a manufacturer that opted in to the AB 1755 procedures, you must file within one year after your express warranty expires, and never later than six years after the vehicle's original delivery; against a manufacturer that did not opt in, the older limitations framework, under which consumers generally had four years, continues to apply. There are now two deadline systems running side by side in California, and which one governs your claim depends entirely on whether your manufacturer's name appears on the Department of Consumer Affairs' opt-in list. That is why the first step in any deadline calculation is the manufacturer opt-in list, and why the full background on the 2025 changes lives on our AB 1755 hub.
The new limitations period was added by AB 1755 (2024) as part of Code of Civil Procedure sections 871.20 through 871.30, and SB 26 (2025) limited those sections to manufacturers that elect in for five-year terms.
What is the one-year rule for opted-in manufacturers?
The one-year rule means your lemon law suit against an opted-in manufacturer must be filed within one year after your express warranty expires. The clock is tied to the warranty, not to when you discovered the defect or when the last repair attempt failed.
Example A. You bought a new SUV with a 3-year/36,000-mile bumper-to-bumper warranty. The warranty expires June 1, 2026 (you hit the 3-year date before 36,000 miles). If the manufacturer opted in, your deadline to file is June 1, 2027. It does not matter that the transmission problems started in year one and the dealer is still "working on it" in 2027; once the warranty expired on June 1, 2026, the one-year countdown began.
Watch for one trap in this rule: vehicles usually carry several warranties of different lengths. A basic bumper-to-bumper warranty might run 3 years while the powertrain warranty runs 5, 6, or even 10 years. Which warranty's expiration starts your clock can depend on which warranty covers your defect, and that is exactly the kind of question to put to a lawyer rather than guess at, because guessing wrong by even a month can end the claim.
What is the six-year cap?
The six-year cap means that no matter how long your warranty runs, a suit against an opted-in manufacturer must be filed within six years of the vehicle's original delivery. A long warranty does not extend the outer limit.
Example B. Your truck was delivered on January 15, 2021, with a 10-year/100,000-mile powertrain warranty that is still active in 2026. Intuition says you have a year after that warranty ends, sometime in 2031. The statute says otherwise: the six-year cap lands on January 15, 2027, six years after original delivery, even though the warranty is still running. A consumer with a live powertrain warranty and a January 2021 delivery date who waits until spring 2027 has no lemon law claim against an opted-in manufacturer at all.
Example B is the scenario most likely to catch careful people, because everything about it feels safe: the warranty is active, the dealer is still doing warranty repairs, and nothing in the glovebox paperwork mentions a six-year limit. The cap runs anyway.
What if my manufacturer did not opt in?
If your manufacturer did not opt in, the one-year rule and the six-year cap do not apply to your claim, and the older limitations framework continues to govern. Under that framework, consumers generally had four years to bring a Song-Beverly claim.
Example C. Same truck as Example B, delivered January 15, 2021, same active powertrain warranty, but this manufacturer never filed an opt-in election with the Department of Consumer Affairs. The AB 1755 clock and cap simply are not part of your case; the pre-2025 rules control, and the deadline analysis runs under the old four-year framework instead. Depending on when your claim accrued, you may have meaningfully more time than the Example B consumer, whose claim against an opted-in manufacturer dies on January 15, 2027.
The lesson from Examples B and C together: two identical trucks with identical defects can have deadlines years apart based only on a manufacturer election you had no part in. Never assume which system applies. Check the list, or better, have counsel confirm it as of your filing date.
How does the 30-day pre-suit notice affect my deadline?
The pre-suit notice compresses your real-world deadline, because a suit seeking civil penalties against an opted-in manufacturer must be preceded by a written notice sent at least 30 days before filing. The notice requirement in Code of Civil Procedure section 871.24 does not pause the limitations period. So if your filing deadline is June 1, 2027, and you want to preserve the civil penalty claim under Civil Code section 1794(c), your notice needs to be in the mail by early May 2027 at the absolute latest, and that assumes the letter is perfect the first time.
Waiting until the final weeks is dangerous for a second reason: a defective notice, one with a wrong VIN, a missing repurchase demand, or the wrong mailing address, may need to be redone, and there may be no time left to redo it. The elements of a compliant letter are covered in our pre-suit notice guide.
Can the filing deadline be paused (tolled)?
Yes, in limited situations defined by Code of Civil Procedure section 871.21. For opted-in manufacturers, the deadline is tolled while the vehicle is out of service with the manufacturer or its repair facility for warranty repairs, while a claim is pending in a state-certified (Tanner) arbitration program, and for up to 60 days after a timely pre-suit notice. Tolling arguments are fact-intensive: they turn on exact dates in repair orders and correspondence, and manufacturers dispute them. Treat tolling as a safety net your lawyer argues about later, not as extra time to plan around.
When should I actually act on a lemon law claim?
Act a full 60 to 90 days before any deadline you calculate, and earlier than that if you can. The 30-day notice period consumes a month by itself. Gathering repair orders, confirming opt-in status, and preparing a complaint consume more. And every date in this area carries interpretive questions (which warranty controls, when delivery occurred, whether the old or new framework applies) that deserve time to resolve. There is no advantage to waiting: your evidence is freshest, and the manufacturer's incentive to resolve the claim is strongest, while the vehicle's repair history is recent.
Remember also what happens after filing against an opted-in manufacturer: the case moves into mandatory early mediation on a fixed schedule, so filing earlier also means resolving earlier. If you are not sure where your dates fall, the basics of what qualifies as a lemon are in the California lemon law guide, and a free consultation can pin the deadline down with your actual paperwork. Under section 1794(d), a prevailing consumer's attorney fees are paid by the manufacturer, so getting the dates checked costs you nothing.
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