I just had the battery replaced under warranty in my 2017 Leaf. It went from a 30kWh battery to a 40 kWh re-manufactured battery. The car used to be very responsive when accelerating. When I returned from the dealership, it felt sluggish, slow to respond. Has anyone else experienced a change like this? The work order stated that they"... reprogrammed motor control system to 291A0-3NF0E" - in case that means something to anyone. Thank you.
Does Battery Replacement Affect Acceleration?
- Thread starter lavaleaf
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MikeinPA
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Looks like the reprogram is required https://static.nhtsa.gov/odi/tsbs/2020/MC-10171230-0001.pdf
The cells may need a few cycles to reach lower internal resistance. Please report back if you notice an increase in available power. If not, it may very well be the firmware update. Either way, please keep us posted.
Hello - Previously the car accelerated quickly even in Eco mode. I drove it both ways when I left the dealer, and Eco is not as quick to respond as it was before; regular Drive is a bit better than Eco. Still, neither are what they used to be. I will report back as I drive it more. Thanks for the input. I hope MikeinPA is right, and that with some cycling it will return to the way it was.
(I will say ... seeing a range of 211 miles when I first turned it on felt like a hallucination. While it almost immediately dropped to the low 190s, it is so much better than the previous high of 110, when be bought it used, and the dismal 65 which we have had to live with for 9 months. If slow acceleration is the trade-off, then so be it.)
(I will say ... seeing a range of 211 miles when I first turned it on felt like a hallucination. While it almost immediately dropped to the low 190s, it is so much better than the previous high of 110, when be bought it used, and the dismal 65 which we have had to live with for 9 months. If slow acceleration is the trade-off, then so be it.)
Short answer: replacing the battery pack should have no affect on acceleration. However, that "reprogram" thing could very well have affected it. Bottom line: whoever did the replacement did something else they shouldn't have.
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