Key Battery - CR2025

[marcuskmt]

The Tiguan has been bugging me to change the key battery. I was a little surprised as it's only 1 1/2 years old, but I guess it is always on.

Does anyone know if it tells me to change the key battery based on time or are there voltage sensors that tell it that the battery is low?

The reason I ask is because I was lazy and used a CR2025 from another device, so it isnt a new battery.

[Simonr23]

It’s voltage based, so you’ll be fine.