California Lemon Law for Commercial Vehicles Under Warranty

California’s Lemon Law isn’t just for family cars. Many small businesses rely on pickups, vans, and other work trucks that are still under warranty—and when those vehicles keep breaking down, the law can offer important protections. This article explains, in plain language, how California Lemon Law can apply to commercial vehicles and what documentation helps if you need to assert your rights. It’s for informational purposes only, not legal advice. If you have questions about your specific situation, please contact ZapLemon for a consultation.

What California Lemon Law Covers for Commercial Vehicles

California’s Lemon Law (part of the Song-Beverly Consumer Warranty Act) generally requires manufacturers to repair vehicles under their express warranties. If a covered vehicle has defects that the manufacturer or its authorized dealer cannot fix after a reasonable number of attempts, the owner may be entitled to a repurchase or replacement, or other remedies provided by the law. Importantly, “new motor vehicle” coverage in California can extend to certain commercial-use vehicles when they’re still under the manufacturer’s warranty.

For commercial vehicles, the law typically applies when the truck or van has a gross vehicle weight under 10,000 pounds and is bought or used primarily for business by a company that has no more than five vehicles registered in California. In everyday terms: many sole proprietors and small businesses with a few work trucks—like contractors with a half-ton pickup, plumbers with a service van, or a small landscaping company’s light-duty truck—may fall within the law’s protection if the vehicle is under warranty. Heavier-duty vehicles or larger fleets often fall outside the Lemon Law’s commercial coverage, though other legal options may still exist.

What counts as a “lemon”? The defect must be covered by warranty and must substantially impair the vehicle’s use, value, or safety. Think recurring transmission slipping, DEF/emissions problems on a diesel that trigger limp mode, persistent brake pulsation, power steering failures, stalling, or electrical issues that disable critical functions. California also has a “presumption” period (generally the first 18 months or 18,000 miles, whichever comes first) where certain numbers of repair attempts or 30+ total days out of service may trigger a legal presumption that the vehicle is a lemon. That presumption helps, but it’s not the only path; vehicles outside that window can still qualify depending on the facts.

How to Document Warranty Repairs for Work Trucks

Strong paperwork can make or break a Lemon Law claim. Each time you bring your truck in, ask for a detailed repair order showing the date and time in/out, current mileage, and an exact “customer states” description (for example: “customer states transmission shudders at 35–45 mph under light throttle,” or “truck enters reduced power mode with DEF warning”). Keep copies of all invoices, warranty repair orders, diagnostic printouts, and any parts replaced. If a repair is “no problem found,” make sure your complaint is still written on the ticket.

Be consistent and precise. Use the same words to describe the same recurring problem so the pattern is clear. Track total days the vehicle is out of service for warranty repairs—especially downtime that affects your business. Consider a simple log listing the date of each visit, issue reported, and outcome. Save photos or short videos of warning lights, smoke on cold start, or vibration shown on your phone’s accelerometer app. If a dealer test-drives the vehicle with you, note who was present and what was observed.

Read your warranty booklet and check for any manufacturer dispute programs or technical service bulletins (TSBs) relevant to your issue. Avoid modifications that could be blamed for the defect (for example, aftermarket tuners for diesel trucks) while the problem is being diagnosed. Keep up with routine maintenance and save those records, too. If issues persist, consider escalating politely to the manufacturer’s customer care line and document those calls or emails. When you’re ready to discuss options, a consultation with a lemon law attorney can help you understand next steps for your specific facts.

This article is for general informational purposes only and is not legal advice. Reading it does not create an attorney–client relationship with ZapLemon. Laws and facts vary, and outcomes cannot be guaranteed. If you believe your work truck or van under warranty may qualify as a lemon, contact ZapLemon for a consultation to discuss your options. Reach out at [ZapLemon phone number] or visit [ZapLemon website] to get started. Attorney advertising.