"B" position on gear shift - Toyota Prius Forum : Prius Online Toyota Forums
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post #1 of 2 (permalink) Old 01-24-2017, 10:07 AM Thread Starter
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Default "B" position on gear shift

What is the real deal with the "B" position on the Prius gear shift control? Some folks claim it is engine compression braking. Some claim it is "enhanced-improved-increased" regeneration and claim to see indications that this is so.

Is the function of the gear selector's "B" position the same across all models/years?

I happen to be on the side of the question that does not think it is extra regenerative braking but I will go with whatever is the truth.

Still super happy with our 2004 Prius at 130,000 + miles.


A blah day in the country beats a whoopee day in the city!
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post #2 of 2 (permalink) Old 03-20-2017, 03:13 PM
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Shortly after buying my Prius, I took it on a vacation in the mountains and did some experimentation with regeneration. I found no evidence of increased regenerative braking in "B". I believe it is using the engine to slow the wheels, and I believe its only usefulness is to help you maintain the desired speed on long downhill stretches without overusing (and potentially overheating) the friction brakes.

Douglas (2002 Prius, 2006 Highlander Hybrid, Wisconsin)
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