Louder Acceleration and Regen Noise

[King_Alfred]

I’m hoping someone here can shed some light on an issue I’ve run into. I have a 2020 Niro EV, and my 12V battery recently died. Thankfully, it gave out after we got home, so I went to the dealership, picked up a replacement, and swapped it out myself.

Since replacing the 12V battery, I’ve noticed a significant increase in noise when accelerating and during regen. It’s much louder than usual, and it’s been bothering me. I did some digging and found that Niro hybrids have a similar issue after 12V battery replacements, which they can fix by pressing the 12V battery reset button. However, I can’t seem to find any such button on the Niro EV.

I also tried using the factory reset option, hoping it might recalibrate the system, but it didn’t seem to have any effect, my infotainment system didn’t even reset, so that was a bust.

Could it be a calibration issue with the EV system after the battery swap, or might there be something else going on?

 

[Kaibarival365]

Why don't you ask the dealership what could it be? I have never heard about this before. Is the replacement battery the same as the original one?

 

[Queenbee]

It might be a problem with the EV system's calibration. Have you attempted to force a system reset by unplugging the 12V battery once again for a few minutes? Checking with the dealership could be helpful if the noise continues.

 

[Bonnie_MacFarlane]

I’ve heard of this before, EVs can be so picky with battery swaps. Try disconnecting the 12V again, wait a few minutes, and reconnect it. If it’s still loud, the dealership may need to run a quick software calibration to get the motor and regen systems back to normal.

 

[MrNiro]

I tried researching to find an answer and some insights into your issue, but didn’t come across anything. The dealership is probably your best bet.