You bought a car rated at 310 miles. Two winters later the dash shows 218 on a full charge, your commute now needs a mid-day stop, and the service center says your battery is performing within specification.

Sometimes that answer is correct. Sometimes it is the thing standing between you and a buyback worth tens of thousands of dollars. Knowing which one you are dealing with is the whole game in an EV lemon law claim, so let’s be straight about where the line sits.

Normal Degradation Is Not a Defect. Say It Out Loud.

Every lithium-ion pack loses capacity. Most EVs shed somewhere in the range of 1 to 2 percent of capacity per year under ordinary use, with the steepest drop in the first year and a slow taper after that. Cold weather, DC fast charging, and routine 100 percent charges accelerate it.

If you have lost 8 percent over four years, no California lawyer is going to win you a buyback, and anyone who tells you otherwise is selling something. That is expected wear, expected wear is not a warranty defect, and it is not an EV lemon law claim.

The reason this matters is that manufacturers use normal electric car battery degradation as cover for everything else. “All batteries degrade” is the first sentence out of the service advisor’s mouth whether you are down 8 percent or 34 percent. Your job is to know the difference. Ours is to prove it.

What Actually Qualifies for an EV Lemon Law Claim

California’s lemon law is the Song-Beverly Consumer Warranty Act. Under Civil Code § 1793.2, when a manufacturer cannot repair a vehicle to match its written warranty after a reasonable number of attempts, it has to replace the vehicle or refund what you paid. The defect has to substantially impair the use, value, or safety of the vehicle.

Range loss impairs use in the most literal way possible. The patterns that support an EV lemon law case:

• Capacity below your warranty’s stated threshold. Most battery warranties promise repair or replacement if usable capacity falls under a defined percentage, commonly around 70 percent, within the coverage period. Fall below it and the manufacturer owes you a fix, full stop.
• Sudden or abnormal loss. Dropping 20 percent in a single year, or overnight after a service visit, is not a degradation curve. It is a fault.
• Battery management system faults. Cell imbalance, inaccurate state-of-charge readings, phantom drain, and repeated high-voltage warnings.
• Charging failures. The car will not DC fast charge, throttles to a crawl, or refuses a charge entirely.
• Software updates that permanently cap range or charging speed. An over-the-air update that takes away capability you paid for is a warranty issue, not a feature change.
• Reduced power, limp mode, or shutdowns tied to the pack or drive unit.
• A replacement pack that has the same problem. This one is common and it does not reset your count.

Every item on that list is a warranty defect rather than a degradation curve, and every one of them has produced EV lemon law buybacks in California.

If your issue is drive unit noise, screens, or door handles rather than the battery, our post on whether California lemon law covers electric vehicles walks through the other EV systems that qualify.

Your Warranty Booklet Is the Document That Controls

Federal rules set a floor of 8 years or 100,000 miles of coverage on the high-voltage battery, and many manufacturers go further. What varies, and what decides your case, is the capacity language buried in the booklet: whether the manufacturer promises a specific state of health, what percentage triggers replacement, and how they measure it.

Pull your California warranty booklet for your VIN and find that paragraph before your next service visit. Then ask the dealer for your measured state of health in writing on the repair order. A verbal “you’re fine” is worth nothing. A printed number is evidence, and it is the single most useful piece of paper in an EV lemon law file.

How Many Repair Attempts You Need

California gives you a presumption, which is a shortcut that shifts the burden to the manufacturer. Within the first 18 months or 18,000 miles, your vehicle is presumed to be a lemon if it went in two or more times for a safety-related defect, four or more times for the same non-safety defect, or spent 30 or more cumulative days out of service for warranty repairs.

Two things people get wrong about EV lemon law repair counts. A software update pushed to your car to address a battery complaint is a repair attempt. And a visit where the technician runs a diagnostic and writes “operating as designed” still counts, because you presented the vehicle and the problem persisted.

Missing the 18-month window does not end your claim either. The presumption is a shortcut, not a ceiling, which matters enormously for batteries, because degradation reveals itself over years rather than weeks.

Why Donlen v. Ford Matters More for EVs Than for Any Gas Car

The case to know is Donlen v. Ford Motor Co. (2013) 217 Cal.App.4th 138. Greg Donlen’s F-450 had a transmission Ford tore down twice under warranty. The symptoms came back roughly a year after the warranty expired, at 45,121 miles. Ford argued the jury should never hear about that later repair. The Court of Appeal disagreed, holding that evidence a problem was patched and then reappeared is relevant to whether the underlying defect was ever resolved.

Two pieces of Donlen carry straight into EV lemon law cases.

First, timing. Battery defects surface slowly. A pack that was flawed from the factory may not show it until year five. Donlen means later evidence is not automatically off the table when it tends to show the vehicle never conformed to its warranty in the first place. That principle also underpins why lemon law can still apply after a warranty expires in the right circumstances.

Second, and more important: Donlen confirmed that you are not required to identify or prove the cause of the defect. You only have to prove the vehicle did not conform to the express warranty. Think about what that means when the thing you are complaining about is a sealed 1,000-pound pack running proprietary software you cannot read. You do not need to name the failed cell group. You need repair orders showing you came in, and a car that still does not deliver what was promised. That distinction is what turns a frustrating battery into an EV lemon law case you can win.

What an EV Buyback Actually Pays

Under § 1793.2(d), a qualifying vehicle entitles you to a comparable replacement or restitution, and the choice belongs to you. An EV lemon law buyback returns your down payment and every monthly payment, sales tax, license and registration fees, finance charges you actually paid, and incidental costs like towing, rentals, and public charging you would not have needed.

One deduction is permitted: a mileage offset calculated as (miles at your first repair visit for that problem ÷ 120,000) × the price you paid. The date your range complaint first landed on a repair order is worth real money, because every mile after it is free. If the manufacturer runs the formula on your current odometer instead, push back.

If the manufacturer willfully ignored its obligation, a court can add a civil penalty of up to two times your actual damages. Given EV transaction prices, that is where these numbers get serious. Owners of a single brand often see the same pattern repeat, which is why our Tesla lemon law attorneys track defect trends by model and model year.

AB 1755 Changed Your Deadlines

California overhauled the process with AB 1755 in 2024, followed by SB 26 in 2025. Automakers now choose between the traditional path and an opt-in track that carries a mandatory 30-day pre-suit written notice, a shorter filing window, and required mediation. The Department of Consumer Affairs publishes the list of manufacturers who opted in each December.

Which track your automaker sits on changes what you must do before an EV lemon law claim can be filed and how fast you have to move. For a slow-developing battery problem, that is the most dangerous change in the entire reform, because the instinct with degradation is always to wait one more winter and see. Do not.

Five Things to Do This Month

1. Screenshot your range at 100 percent charge, monthly, with the odometer visible. A degradation curve you can show a judge beats an argument every time.
2. Get a printed repair order at every visit, including “no fault found” visits, and confirm your complaint is in your own words.
3. Ask for your measured battery state of health in writing, and ask which test they ran.
4. Note the date and mileage of your first range or charging complaint. That number drives your offset, and it is the first thing an EV lemon law attorney will ask you for.
5. Check your VIN against NHTSA’s recall database for battery or charging recalls and service bulletins.

Find Out Where You Actually Stand

If you are down a few percent, you are fine, and we will tell you that for free rather than sell you a case you do not have. If your range fell off a cliff, your pack is below its warranty threshold, or you have been told “within spec” three times while planning your life around a charger, that is a different conversation, and it is what EV lemon law was built for.

We handle the manufacturer, the deadlines, and the offset math. The manufacturer pays our fees, not you. Win or lose.

Start with our two-minute qualifier to find out if your car is a lemon, or call (310) 525-2244. Bring your repair orders and your range screenshots, and we will tell you in one conversation whether you have an EV lemon law claim worth filing.