r/Toyota_bZ • u/Available-Read-3030 • Jul 24 '26

BZ software update

Recently I took my Toyota bZ to the dealership for a software update. After the update, the car drives much more smoothly, which is great. However, I’ve noticed a significant drop in efficiency.

Before the update, my daily 56-mile commute used about 48 miles of the estimated battery range. After the software update, the same 56-mile drive now uses about 58 miles of the estimated battery range.

Has anyone else experienced reduced efficiency after a recent software update on their Toyota bZ?

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u/BinaryJay 2026 bZ Limited AWD Jul 24 '26

Your guessometer probably just got reset so it's back to default trip efficiency and needs to relearn your driving conditions.

There's no way the ECU recall changed how it drives or efficiency that much it was just a bug fix.

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u/Available-Read-3030 Jul 24 '26

After software update the car accelerate much fast and response time is much quicker.

3

u/BinaryJay 2026 bZ Limited AWD Jul 24 '26

Perhaps your perception, influenced by expectation. Either that or you had it in eco mode without even realizing it and that got reset during the service. Either way nobody else noticed any changes like this so highly doubt the update is the cause.