California Lemon Law and Factory Defect Complaints

If your new or certified pre-owned vehicle keeps going back to the dealer for the same issue, you’re not alone. Many California drivers experience factory defects—problems that were built into the car before it was sold—and wonder whether the California Lemon Law can help. This article explains how the law applies to factory defects and what steps you can take to document issues and protect your rights.

How California Lemon Law Applies to Factory Defects

California’s Lemon Law—part of the Song-Beverly Consumer Warranty Act—generally protects consumers who buy or lease vehicles with manufacturer-backed warranties. If a factory defect substantially impairs the vehicle’s use, value, or safety, and the manufacturer or its authorized dealer can’t fix it after a reasonable number of attempts, the law may provide remedies. The same protections can apply to many used vehicles that are still covered by a manufacturer’s warranty, including certified pre-owned cars.

A “factory defect” is a problem that stems from the vehicle’s design, materials, or assembly, rather than normal wear-and-tear or damage from accidents or aftermarket modifications. Common examples include repeated transmission shuddering, engine stalling, electrical or infotainment system failures, brake defects, steering issues, and battery or range problems in hybrids and EVs. Recalls can overlap with factory defects; even if a recall repair is performed, ongoing issues may still support a Lemon Law claim when repairs aren’t successful.

California law uses several ways to assess whether repairs have been “reasonable,” such as multiple attempts for the same issue or the vehicle being out of service for a significant number of days. There is also a legal “presumption” that applies within the first 18 months or 18,000 miles for certain patterns of repair, but your rights can exist beyond that time if the defect is covered by the manufacturer’s warranty. Potential remedies under the law may include a repurchase (often called a buyback), a replacement vehicle, or, in some situations, a cash-and-keep settlement—though outcomes depend on the facts and must be evaluated individually.

Steps to Document Defects and Protect Your Rights

Start by keeping thorough records. For every visit, ask the dealer to write a detailed repair order that includes your exact complaint (“customer states”), dates, mileage in/out, and all diagnostic steps, parts, and software updates performed. Save everything—work orders, invoices showing $0 warranty repairs, tow receipts, rental/loaner paperwork, and your own notes. Photos or short videos of symptoms (warning lights, leaks, noises, stalling) can be powerful, especially for intermittent problems.

Report issues promptly and stick with an authorized dealership while the vehicle is under warranty. If the defect reappears, return to the dealer and describe the same symptom consistently so your paper trail shows repeated attempts for the same problem. Avoid modifications that could let the manufacturer blame the issue on aftermarket parts or tuning. If the car sits at the shop, note each day it’s out of service, and confirm the dealer documents all delays, parts waits, and test drives.

Educate yourself on your warranty coverage and check for Technical Service Bulletins (TSBs) or recalls that match your symptoms. Communicate important concerns in writing when possible (for example, email the service advisor or manufacturer’s customer care) and keep copies. Deadlines can apply, and strategy matters, so consider speaking with a professional about your options before making major decisions such as accepting a trade or signing releases. For guidance tailored to your situation, a consultation with ZapLemon can help you understand next steps.