Tesla's Autopilot confused a Burger King sign for a stop sign. The fast-food chain turned it into an ad.

• A Tesla owner posted a video online of their car mistaking a Burger King sign for a stop sign.
• Burger King saw a chance to turn it into advertising.
• "Smart cars are smart enough to brake for a whopper," the fast-food chain's latest ad says.

Burger King figured out a way to turn a Tesla Autopilot error into marketing.

The fast-food chain on Tuesday released an ad that uses part of a YouTube video in which Tesla's assisted-driving feature mistakes a Burger King sign for a stop sign and begins to stop.

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"Smart cars are smart enough to brake for a whopper," the ad says, offering a free burger to smart-car owners who post a photo at a restaurant. "Artificial intelligence knows what you crave."

—Burger King (@BurgerKing) $4

The original video appears to be from a May 10 post on YouTube by EV.network. In the six weeks since, it's racked up only a little over 1,000 views.

"Just as I come over this hill, there's a Burger King sign that's down the hill, and it's going to try to stop," the driver says in the video. "'Stopping for traffic control, over and over again, and then it figures it out."

Tesla's Autopilot is no stranger to internet videos showing its errors as the company collects data to improve the software. Still, the company's marketing materials and CEO Elon Musk's comments about "full self-driving" have come under scrutiny as misleading and dangerous.

—E.W. Niedermeyer (@Tweetermeyer) $4