Most people looking up a lemon law deadline want one number. California doesn't have one. The time to file depends on which manufacturer built the car, which set of rules that manufacturer follows, when the warranty ends, and sometimes when it became clear the repairs weren't working. For some vehicles, the deadline can now arrive well before the "four years" many websites quote.
A claim filed late can be dismissed no matter how bad the car is. The rules below are current as of October 2026.
Three clocks that get confused
Lemon law cases involve three separate time periods, and only one of them is a filing deadline.
- The warranty period. The defect has to show up while the manufacturer's warranty is in effect. The Department of Consumer Affairs says the lemon law applies throughout the original warranty period, not just the first year or two (how the lemon law works explains which defects count).
- The 18-month or 18,000-mile window. This controls the presumption explained on our repair attempts page. It is not a deadline to file, and claims can rest on defects that start after it closes.
- The statute of limitations. This is the deadline to file a lawsuit, and the rest of this page is about it.
The traditional rule: four years, starting when?
For manufacturers that did not opt into the 2025 procedures, the four-year limit in Commercial Code section 2725 applies to Song-Beverly claims (a California appeals court so held in Krieger v. Nick Alexander Imports, 1991). The harder question is when the four years begin. Section 2725 says a breach of warranty normally occurs on delivery. It makes an exception when a warranty "explicitly extends to future performance of the goods" and the breach can't be discovered until then. In that case, the clock starts "when the breach is or should have been discovered."
Courts have often treated new-car repair warranties as warranties of future performance. That can move the start of the four years to when you knew, or should have known, the manufacturer couldn't fix the defect. It is an argument, though, and the manufacturer may argue for an earlier start. Take a car delivered in May 2022. Counted from delivery, four years ended in May 2026. Counted from a failed repair in late 2024, the claim may still be alive. Nobody should plan around the later date without a lawyer reading the warranty and the repair orders.
Opted-in manufacturers: one year after the warranty, six years at most
AB 1755 created a shorter limit, and SB 26 made it apply only to manufacturers that elected the new procedures. For those manufacturers, Code of Civil Procedure section 871.21 says a lawsuit seeking a buyback or replacement must be filed within one year after the applicable express warranty expires. It can never be filed later than six years after the vehicle's original delivery. Both periods can be paused, as the tolling section below explains.
Which manufacturers opted in can change, and the Department of Consumer Affairs publishes an updated official opt-in list by December 15 each year, so check it instead of relying on a list you saw elsewhere. A manufacturer's election also covers particular sale years, so the real question is whether the election reaches your vehicle. Our page on the 2025 lemon law changes follows the list as it changes.
How mileage moves the deadline
The one-year clock starts when the warranty expires, and warranties expire by time or by miles, whichever comes first. Two owners took delivery of identical cars from an opted-in manufacturer in January 2025, each with a 3-year or 36,000-mile basic warranty.
| Drives 24,000 miles a year | Drives 9,000 miles a year | |
|---|---|---|
| Basic warranty ends | About July 2026, at 36,000 miles | January 2028, at 3 years |
| One year later | About July 2027 | January 2029 |
| Six-year outer limit | January 2031 | January 2031 |
The same car, bought the same month, has filing deadlines 18 months apart. Tolled days push each date later. Which warranty counts as the "applicable" one (basic, powertrain, or an EV battery warranty) can change the answer for a given defect, and it is one of the first things an attorney checks.
What pauses the clock
Tolling stops the clock for a defined period, and those days are added to the deadline. Four rules can apply.
- State-certified arbitration. Civil Code section 1793.22(c) extends any federal or California limitation period by the days between filing a complaint with a qualified dispute program and its decision. If you accept the decision, the extension runs to the date the manufacturer must carry it out, if that is later. This applies under both sets of rules.
- Days in the shop (opted-in manufacturers). Section 871.21 adds the time the car was out of service for repair of any defect. Forty-one days at the dealer means forty-one more days.
- Pre-suit notice (opted-in manufacturers). The period after you send a pre-suit notice under section 871.24 is tolled, for up to 60 days.
- Warranty extensions. Civil Code section 1795.6 pauses the warranty period itself while the car is in for warranty repair, from drop-off until you are told it is ready. The warranty also isn't treated as expired if a repair didn't fix the defect and you told the manufacturer or the seller within 60 days after that repair. How these extensions interact with the opt-in deadline is a question for a lawyer, not something to count on.
Count conservatively. Tolling is easy to argue about after the fact, because each side may read the dates on the repair orders differently. The safest deadline is the one figured without it.
Defects that start late in the warranty
Problems that appear near the end of coverage leave the least room to wait. Suppose a car's touchscreen and rearview camera start failing at month 33 of a 36-month warranty. Report it in writing right away and keep bringing the car back, because the claim depends on the defect showing up during the warranty and the manufacturer getting a reasonable chance to fix it. If the manufacturer opted in, the one-year filing clock starts a few months later, when the warranty ends. Under the four-year rule, the start date may turn on when it became clear the repairs were failing. And if a repair doesn't hold, the 60-day notice rule in section 1795.6 is a reason to tell the dealer or manufacturer in writing promptly.
What waiting costs besides the deadline
Delay causes problems short of a missed deadline. Repair records get harder to collect, and memories of dates and symptoms fade. If your manufacturer opted in and you want to keep the option of civil penalties, you must still have the car when you send the pre-suit notice (Code of Civil Procedure section 871.24(c)). Selling or trading it first can close that door. One thing delay does not change is the use offset in a lemon law buyback, which is fixed by the mileage at the first repair visit for the defect.
Dates to collect this week
A lawyer needs these to work out your deadline:
- The date the car was delivered to you, from the purchase or lease paperwork.
- The time and mileage limits of the basic, powertrain and any EV battery warranty, from the warranty booklet.
- Each repair visit's date in, date out and mileage, from the repair orders.
- Any letter or email you sent the manufacturer, and the date it arrived.
- The filing and decision dates of any arbitration.
- Today's odometer reading.
Send that list with a free case review request, or run through the lemon checker first. If your warranty has already expired or is close to it, call before the next repair visit rather than after it.
Updated October 2, 2026
Common questions
Does the lemon law deadline start on the day I bought the car?
Not necessarily. Under the traditional four-year rule, the start may be the delivery date or the date the breach was or should have been discovered, depending on the warranty and the facts. For manufacturers that opted into the 2025 procedures, the main clock starts when the applicable warranty expires, with a six-year outer limit measured from original delivery.
My warranty just expired. Is it too late?
Not automatically. If the defect showed up and was reported while the warranty was in effect, you may still have time. For an opted-in manufacturer, the filing period generally runs one year from the warranty expiration, plus any tolled days, and under the four-year rule it may run longer. Expiration does start the clock quickly, so get your repair orders reviewed now.
How do I find out if my manufacturer opted in to the new rules?
Check the Department of Consumer Affairs opt-in list linked above, which is updated by December 15 each year. For new vehicles, the law also requires the manufacturer to tell the buyer at the time of sale which set of procedures applies, so look through your sale documents too. An attorney can confirm whether the election covers your vehicle's sale year.
Does going to manufacturer arbitration stop the deadline?
A state-certified program pauses it. Civil Code section 1793.22(c) extends any federal or California limitation period by the days between filing with a qualified program and its decision, or the date the manufacturer must carry out an accepted decision if that is later. Keep the filing confirmation and the decision letter, because those dates are your proof.
Does sending the manufacturer a demand letter pause the deadline?
There is a specific rule for one group of manufacturers. For those that opted in, the period after a pre-suit notice under Code of Civil Procedure section 871.24 is tolled for up to 60 days. Outside that rule, don't assume a letter, a phone call, or a case number from the manufacturer's customer line stops the clock.