California Lemon Law for Overheating Engines on New Cars

If your brand-new car keeps running hot, you’re not alone—and you’re right to ask what the California Lemon Law says about overheating engines. Persistent overheating can be more than an inconvenience; it can also pose safety risks and cause costly engine damage. This article explains, in plain language, how California’s Lemon Law may apply when a new car’s engine overheats and what steps you can take to protect your rights.

New Cars Overheating: California Lemon Law 101

California’s Lemon Law, part of the Song-Beverly Consumer Warranty Act, generally protects buyers and lessees of new vehicles that have substantial defects covered by the manufacturer’s warranty and that aren’t fixed after a reasonable number of repair attempts. “Substantial” means the issue affects the car’s use, value, or safety. Overheating often checks all three boxes because it can strand you, damage the engine, and create hazardous driving conditions.

Engine overheating can stem from coolant leaks, defective water pumps, faulty thermostats, air pockets after service, radiator or fan problems, head gasket failures, or software/sensor glitches. If your dealer keeps trying to fix the same overheating concern and it persists, that pattern can be important under the Lemon Law. California’s “lemon law presumption” may apply within the first 18 months or 18,000 miles if there have been multiple repair attempts for the same defect or the car has been out of service for an extended time (often discussed as 30 or more cumulative days). Whether the presumption applies, and what counts as a “reasonable” number of attempts, depends on your specific facts.

If your vehicle qualifies, potential remedies under California law can include a refund (sometimes called a repurchase) or a replacement vehicle, with a mileage-based offset in many cases. Some manufacturers offer arbitration programs, and deadlines can apply, which is why learning your options early is helpful. This article is for general information only—every case is different, and a consultation is the best way to understand how the law might apply to your situation.

What to Document and When to Seek ZapLemon Help

Good records are your best friend. Save every repair order and make sure each one lists your exact complaint (for example, “engine overheating after 15 minutes on highway; temperature gauge red; coolant smell”), the date, mileage in/out, the dealer’s findings, and what was done. Keep notes on warning lights, dashboard messages, steam from the hood, coolant top-offs, tow receipts, rental car invoices, and how many days your vehicle was in the shop.

Act promptly when you see an overheating warning—safely pull over, avoid driving the car hot, and contact roadside assistance if needed. Get warranty service at an authorized dealership and ask the advisor to include detailed symptoms and any recurrence history on the repair order. Even “no problem found” visits matter; they document a repair attempt. Ask whether there are applicable technical service bulletins (TSBs) or recalls. Maintain a simple timeline of events so you can quickly show the repeat nature of the problem.

Ongoing engine overheating on a new car isn’t normal—and California’s Lemon Law offers important protections when warranty repairs don’t solve the problem. By documenting each visit, keeping copies of all repair records, and understanding how “reasonable repair attempts” and “time out of service” work, you can make informed decisions about your next steps.

This article is for informational purposes only, is not legal advice, and does not create an attorney-client relationship. Results vary and no guarantee or promise of outcome is made. This is attorney advertising.