When should i change my transmission fluid in my 2015 honda crv?

Hello, you change your transmission (and transfer unit fluid for all wheel drive models) when the "minder 3" light comes on. This should happen around 25,000 - 40,000 miles. If you are electing to service due to "severe duty" usage, every 30,000 miles is adequate. Ensure you are just performing a "drain and fill" of 3-4 quarts, not a "flush" or "fluid exchange" which is entirely unnecessary for this vehicle. Also, ensure you are using only genuine Honda fluid.