Giving car to daughter and since its lived in Phoenix for 5.5 years and 80K miles I'm simply looking to replace battery purely as preventative maintenance. Just wondering what people or Toyota are actually installing to replace the 355LN2-MF. I drive a Tundra and replacing the battery is quite simple as every battery website has an exact option to put in which can then be supported with multiple reviews. Our RAV4 is literally one of the top selling vehicles on the planet and it seems impossible to find any agreement on what should replace the now defunct 355LN2-MF. Two Toyota dealerships within 5 miles of my home offered two completely different model #'s for the VIN #. I just assumed now that our 5th Gen has been sold since fall of 2018 there would be a standard on which battery and model # is being used on a somewhat regular basis.
Not sure, but it could be that the different part numbers are either different warranties between the True Start (84 month warranty) and True 2 (60 month warranty)? Or perhaps between one quoting a H4 size and one quoting a H5 size?
I do not think the original 355N2-MF battery that came with the car are available for purchase, at least easily, and/or relative cheaply.
Being that your car is a 2020, your version of the 355N2-MF battery should have water filler caps where one can add distilled water, or perhaps this was just a J Vin thing. These caps were done away with in later years.
You can check resting voltage, with the car in accessory mode, anything under 11.9 volts and I would replace or, being that the car is over 5 years old and in a hot climate, just replace it.
The correct part number should be TrueStart 00544-H5061-LW for "top of the line" battery. This is an H5 with a two year full warranty and a 84 month prorated. In the South East, one can purchase the same battery with a lifetime warranty, not sure about other parts of the country.
