Lemon Law Rights for Truck Owners in California

Trucks work hard in California, and when a new or used truck keeps breaking down, it can disrupt work, family life, and your budget. California’s Lemon Law offers protections to many truck owners facing repeated warranty repairs. Below, ZapLemon explains the basics in plain language and shares practical tips to help you understand your options and get organized.

Understanding California Truck Lemon Law Basics

California’s Lemon Law (part of the Song-Beverly Consumer Warranty Act) applies to many trucks that come with a manufacturer’s written warranty. That includes new trucks and used or Certified Pre-Owned trucks that are still covered by the original factory warranty. If you use your truck primarily for personal, family, or household purposes, it may be covered. Some business-use trucks are also covered if the business has five or fewer vehicles registered in California and the truck’s gross vehicle weight is under 10,000 pounds.

A truck is generally considered a potential “lemon” when it has a substantial defect covered by the warranty that the manufacturer (through an authorized dealer) cannot fix after a reasonable number of attempts. Common truck examples include persistent transmission shudder, repeated “limp mode,” diesel emissions/DEF or DPF failures, braking or steering issues, severe vibration under load, or electrical problems that cause stalling. California has a helpful guideline called the “lemon law presumption”: within the first 18 months or 18,000 miles, two attempts for a serious safety defect, four attempts for other defects, or 30 total days out of service may trigger a presumption that the vehicle is a lemon. These are guidelines—trucks can still qualify outside those numbers based on the facts.

If your truck qualifies, potential remedies may include a repurchase (buyback) or a replacement truck, usually at the consumer’s option, with a statutory usage deduction based on mileage at the first repair attempt for the defect. In some situations, consumers negotiate a cash payment to keep the vehicle. California’s law also allows recovery of reasonable attorneys’ fees from the manufacturer if you prevail, which can make it easier to get help. Every case is fact-specific, and outcomes depend on the evidence, so it’s important to review your situation with a professional.

What to Document: Repairs, Warranties, and Time

Documentation is the backbone of any lemon law claim. Save every repair order and invoice, even if the dealer says “no problem found.” Make sure your complaint is written clearly on the repair order (for example, “truck stalls when towing uphill” or “DEF warning returns after regen”). Track dates in and out, mileage at drop-off and pick-up, and any towing, rental, or loaner car records. Photos, videos of warning lights, and notes about driving conditions (towing weight, temperature, highway vs. city) can help show the pattern.

Review your warranty coverage so you know what’s included. The manufacturer’s new vehicle limited warranty, powertrain warranty, and emissions warranties may all be relevant—especially for diesel trucks with aftertreatment systems like the DEF tank, DPF, EGR, and NOx sensors. Certified Pre-Owned programs may extend some coverage, while third-party service contracts are not the same as a manufacturer’s warranty. Check for recalls or technical service bulletins related to your symptoms. If you’ve added aftermarket parts or tuning, talk with a professional about how that might affect warranty coverage and repairs.

Time matters. The lemon law presumption window is the first 18 months or 18,000 miles, but claims can extend beyond that if the problems began under warranty. California generally has a four-year statute of limitations, often measured from when you knew or should have known about a potential breach, but the timeline can be complex. Don’t wait—start a simple timeline of repairs and contact history, and consider speaking with a lemon law professional early to understand your options and next steps.