Most Prius owners drive around in D their whole life and never touch B. That’s totally fine. B isn’t for everyday driving—it’s a specialty tool. Use it when you’re going down a long, steep grade. Think of mountain roads, huge bridges, or that parking garage ramp that feels like a roller coaster drop.
Try it out on a gentle slope first, just to feel the difference. You’ll notice the car slows down without you touching the brakes. It’s a little weird at first—like the car is reading your mind—but you’ll quickly realize how smooth it feels.
A quick warning: don’t use B on flat roads or in stop-and-go traffic. It will slow you down more aggressively than normal coasting, which can actually waste energy and annoy drivers behind you. Save B for the hills, and your car will thank you.
Let’s Bust A Myth While We’re At It
Some folks think B is a “low gear” for towing or for getting extra power. Nope. It’s not for towing a trailer or for launching off a traffic light. The Prius isn’t built for that. B is purely about controlling your speed on a decline.
What Is The B Mode On The Prius Shifter? B Gear Meaning
Also, don’t worry about breaking the car if you accidentally bump it into B. You can switch between D and B at any speed without pressing a button or stopping. It’s seamless. So if you’re cruising down the highway and accidentally nudge it, you’ll just feel a little drag—like the car is gently saying, “Whoa there, partner.”
Slide it right back to D, and you’re good. No harm, no foul.
