California Lemon Law and Early Vehicle Defects

Early vehicle trouble can be stressful, especially when your car is brand new or recently purchased. California’s Lemon Law gives consumers important protections when defects show up early and don’t get fixed after reasonable attempts. Below, ZapLemon explains how the law looks at early defects, what “reasonable repair attempts” can mean, and practical steps you can take to protect your rights.

What California’s Lemon Law Covers Early On

California’s Lemon Law—part of the Song-Beverly Consumer Warranty Act—generally covers new cars, leased vehicles, and many used or certified pre-owned vehicles that are still under the original manufacturer’s warranty. If a defect arises during the warranty period and substantially impairs the vehicle’s use, value, or safety, the manufacturer must have a reasonable opportunity to repair it. If they can’t, you may be entitled to a buyback or replacement under the law, subject to certain conditions and offsets.

There’s a special “early” timeframe known as the Lemon Law presumption (often called the Tanner presumption). If the problem happens within the first 18 months from delivery or 18,000 miles—whichever comes first—the law presumes the vehicle is a lemon if one of several triggers is met. Common triggers include: the same issue being repaired four or more times; a serious safety defect addressed two or more times; or the car being out of service for warranty repairs for a total of 30 or more days. This presumption is rebuttable, and every case depends on its facts.

“Substantial impairment” doesn’t mean the car must be undrivable. Early issues like repeated transmission shudder, engine stalling, brake pulsation, steering pull, electrical faults, ADAS sensor malfunctions, or infotainment blackouts can qualify if they meaningfully affect safety, value, or everyday use. For electric and hybrid vehicles, early battery range loss, charging failures, or thermal management warnings can also be significant. The key is that the defect arises under warranty and persists despite reasonable repair attempts.

Early Defects, Repair Attempts, and Lemon Tips

When a new car shows problems early, it’s important to give the dealer a clear opportunity to fix them under the manufacturer’s warranty. “Reasonable attempts” will vary based on the defect. For example, a serious safety issue like brake failure or airbag warning may require fewer attempts than a cosmetic rattle. Document each visit: what you complained about, what the dealer found, and what was repaired or replaced. Ask for a detailed repair order every time—even if the shop “could not duplicate” the concern.

Real-world examples help. Suppose your SUV’s transmission hesitates and slams into gear within the first 2,000 miles, and the dealer flashes software twice with no improvement. Or your EV loses significant range and shows repeated high-voltage battery alerts after one month, with multiple service visits and parts on backorder. Or your truck’s check-engine light returns after three coil replacements, and it’s been in the shop for over 30 days combined. These patterns may point to a potential lemon-law situation, especially within the 18 months/18,000 miles presumption window.

A few practical tips can strengthen your position without offering legal advice. Keep a log of dates, mileage, and symptoms; take photos or video when safe; and save all work orders and towing receipts. Confirm your warranty status and any technical service bulletins (TSBs) related to your VIN. Communicate concerns in writing to both the dealer and the manufacturer, and consider politely escalating to the manufacturer’s customer care if repairs stall. Before pursuing next steps, consult a qualified lemon law attorney to review your facts; every situation is unique, and outcomes depend on specific evidence and timelines.