Arizona's used-car defect window lasts 15 days or 500 miles

The 15-day or 500-mile window has limits

Arizona Revised Statutes section 44-1267 generally prevents a used-motor-vehicle dealer from disclaiming the implied warranty of merchantability before midnight on the fifteenth calendar day after delivery or before the vehicle has been driven 500 miles, whichever comes first. The vehicle must function safely and be substantially free of a defect that significantly limits ordinary transportation.

This protection is tied to a sale by a used-motor-vehicle dealer. It is not a blanket return policy for every vehicle purchase or an automatic promise that every repair will be free. The buyer must give the seller reasonable notice and a chance to repair; the statute allows the buyer to pay up to $25 for each of the first two covered repairs. A waiver is limited to a particular defect that the dealer fully discloses and the buyer accepts in the required written form.

Do not count on a three-day cancellation period

The Arizona Attorney General's September 4 guidance says vehicle purchases in the state do not have a general three-day right of rescission. A dealer's or online seller's written return policy may provide a separate option, but the deadline, mileage cap, shipping charges, condition rules, and refund timing come from that policy or contract.

Read the full agreement before signing and leave no blank spaces. Make sure the advertised vehicle price, optional add-ons, trade-in allowance, amount financed, annual percentage rate, loan term, and total payments match what you agreed to. Keep copies of the advertisement and every signed document.

Online purchases need an early inspection plan

The state guidance warns that an online buyer may not be able to obtain an independent mechanical inspection before delivery. When a written return period exists, schedule that inspection immediately after delivery and before the deadline. Confirm in advance whether shipping or other charges are refundable and how long a down payment or trade-in credit may take to return.

Save screenshots of the listing and compare the delivered vehicle's identification number, condition, equipment, and features with what was advertised. A vehicle-history report can add useful context, but it does not replace an independent mechanical inspection.

Watch for changed financing after delivery

A spot delivery happens when a buyer takes the vehicle before financing is final. The attorney general's guidance says that if the dealer later proposes a higher rate, longer term, or other changed terms, the buyer may reject the change and the dealership must return the trade-in. Review any request to re-sign line by line rather than treating it as routine paperwork.

• Get a financing offer from a bank or credit union before shopping so you have a comparison point.
• Confirm in writing whether financing is final before taking the vehicle.
• Keep the original contract, buyer's order, trade-in records, and every later financing message.
• Report unresolved Arizona title or dealer issues through the official state channels identified by the attorney general and ADOT.