Under the California lemon law, formally the Song-Beverly Consumer Warranty Act, a manufacturer that cannot repair a warranty-covered defect after a reasonable number of attempts must either buy the vehicle back or replace it. The defect has to substantially impair the vehicle’s use, value, or safety, and the protection applies to both purchased and leased vehicles sold with a written manufacturer’s warranty. A buyback refunds the purchase price, taxes, registration, and out-of-pocket costs like towing and rental cars, with one deduction for the miles you drove before your first repair visit.
When a Vehicle Qualifies as a Lemon
Two things have to be true. The defect must be covered by the manufacturer’s warranty, and it must substantially impair the vehicle’s safety, value, or use. Brake failures, steering defects, and highway-speed stalling are the clearest safety examples. The law reaches further than danger, though. A transmission that slips unpredictably, an electrical fault that keeps the car from starting, or a broken air conditioner in a region where summer temperatures regularly top 100 degrees can all meet the standard when they meaningfully reduce reliability or resale value.
The manufacturer gets a reasonable number of chances to fix the problem. What counts as reasonable depends on how serious the defect is:
- Safety defects that could cause death or serious injury: two unsuccessful repair attempts.
- Other warranty-covered defects: four unsuccessful repair attempts for the same problem.
- Time out of service: more than 30 cumulative days in the shop for warranty repairs, even if the days aren’t consecutive.
Each attempt has to be documented. The dealership or authorized repair facility needs a genuine opportunity to diagnose and fix the specific complaint you reported. Vague service records that don’t describe the problem or the work performed can sink a claim, so read every repair order before you sign it and make sure it reflects what you actually told the service advisor.
The 18-Month, 18,000-Mile Presumption
If the repair-attempt thresholds above are met within 18 months of delivery or before 18,000 miles on the odometer, whichever comes first, the law presumes the vehicle is a lemon.1California Department of Consumer Affairs. Arbitration Certification Program – California’s Lemon Law Q&A That presumption flips the burden of proof onto the manufacturer, who then has to show the vehicle isn’t a lemon.
Outside that window, you can still file. You lose the presumption and carry the full burden of proof, which makes the case harder but not impossible when repair records clearly document a persistent, unresolved defect during the warranty period.
Which Vehicles Are Covered
The Song-Beverly Act covers new cars, trucks, SUVs, and motorcycles sold or leased in California with a manufacturer’s written warranty.2LegiScan. California Code – Song-Beverly Consumer Warranty Act: Services and Repairs: Travel Trailers and Motor Homes For motorhomes, coverage extends to the chassis, chassis cab, and drivetrain, but not necessarily the living-quarters portion.1California Department of Consumer Affairs. Arbitration Certification Program – California’s Lemon Law Q&A
Used vehicles are covered when the defect appears while the original manufacturer’s warranty is still in effect. A two-year-old car bought from a private seller can qualify as long as the factory warranty hasn’t expired by time or mileage. Certified pre-owned vehicles often carry a manufacturer-backed extension beyond the original coverage, which can widen the window further. The question is always whether the specific defect falls under a manufacturer’s warranty that was active when the problem first appeared.
Small business vehicles get protection too, with limits. The business must have no more than five vehicles registered in California, and the vehicle in question must have a gross vehicle weight under 10,000 pounds. Many state lemon laws exclude commercial vehicles outright, so this carve-out matters for owners of work trucks and delivery vans.
What a Buyback Pays You
A buyback is not just the sticker price returned. The statute covers the actual price you paid, including transportation charges and manufacturer-installed options, plus collateral charges: sales tax, license fees, registration fees, and other official fees. On top of that, the manufacturer must reimburse incidental damages such as towing bills, rental car expenses, and any out-of-pocket repair costs.3California Legislative Information. California Civil Code 1793.2 For leased vehicles, the monthly payments you’ve already made are included in the restitution calculation.
The Mileage Offset
One deduction is allowed: a usage offset for the miles you put on the vehicle before your first repair visit for the defect. The formula is the purchase price (including transportation and manufacturer-installed options) multiplied by the odometer reading at the first repair visit, divided by 120,000.3California Legislative Information. California Civil Code 1793.2
In practice: a $40,000 car brought in for the first repair at 3,000 miles produces an offset of $40,000 × (3,000 ÷ 120,000) = $1,000. Wait until 12,000 miles to come in with the same defect, and the offset on the same car jumps to $4,000. The denominator stays at 120,000 regardless of the vehicle’s expected lifespan, so going to the dealer as soon as the problem shows up directly limits what gets taken off your refund.
Replacement Instead
You can choose a substantially identical replacement vehicle instead of a cash buyback. Incidental damages and collateral charges are still owed; the usage offset comes out of the replacement value rather than being refunded as cash.
Documentation to Gather Before You File
Lemon law claims live or die on paperwork. Arbitrators and adjusters are not going to take your word for how many times the car was in the shop. Pull together:
- Your purchase or lease agreement, which proves the acquisition date, the price, and the warranty terms.
- Every repair order and invoice. Each should show the date, the complaint you reported, the diagnosis, and the work performed. If a repair order doesn’t match what you told the service advisor, ask them to correct it before you sign.
- The warranty booklet, with the manufacturer’s contact information for warranty disputes and the coverage terms.
- Any correspondence with the manufacturer or dealer about the defect: emails, letters, chat transcripts.
- Receipts for out-of-pocket costs tied to the defect, including towing invoices, rental car agreements, and rideshare receipts.
Ask the dealer for a complete service history printout tied to your VIN. Internal electronic records often contain technician notes and warranty repair codes that don’t appear on the customer-facing paperwork, and that extra detail can strengthen the claim.
How to File the Claim
Start with a written demand to the manufacturer. Describe the vehicle, give the VIN, state the defect, and list the repair history. Send it by certified mail with a return receipt. Most manufacturers list a specific address for warranty disputes in the owner’s manual or warranty supplement.
The manufacturer will review your service history and either agree to a buyback, offer a settlement, or deny the claim. If the response is a denial or a lowball offer, you have two paths.
State-Certified Arbitration
California certifies arbitration programs that handle lemon law disputes. A neutral arbitrator reviews both sides and issues a written decision, typically within 40 days of filing.4Department of Consumer Affairs. Frequently Asked Questions – Arbitration Certification Program Arbitration through a certified program is free to the consumer, and no attorney is required, though one can help.
If the manufacturer has a state-certified program, you may need to go through it before filing a lawsuit. The arbitrator’s decision doesn’t bind you, though. An unfavorable outcome still leaves the courthouse open.
A Lawsuit in Civil Court
When arbitration doesn’t resolve the dispute, or the manufacturer doesn’t participate in a certified program, you can file a civil lawsuit. The Song-Beverly Act requires the manufacturer to pay your reasonable attorney fees and costs if you prevail. That fee-shifting rule is why most lemon law attorneys take these cases on contingency with nothing due upfront. A well-documented case rarely has trouble finding representation.
The Federal Backup: Magnuson-Moss
The federal Magnuson-Moss Warranty Act applies to any consumer product sold with a written warranty and gives California consumers a second avenue when a defect falls outside Song-Beverly’s scope or when federal court is a better venue. It also prohibits tie-in sales provisions: a manufacturer cannot void your warranty just because you used third-party parts or had maintenance done at an independent shop. Like the state law, Magnuson-Moss shifts attorney fees to the manufacturer when the consumer wins, so a Californian with a legitimate lemon has strong financial incentive to pursue the claim and limited downside risk when the records support it.