Road Tripping From Florida to Virginia

AGM Battery Replacement?

clovisb31 · 2026-03-20T20:49:26+00:00

Hello, I'm thinking about replacing the OE flooded lead acid battery with an equivalent size AGM type battery. The Tacoma charging system provides 13.9 Volts to the stock OE battery. An AGM battery typically needs 14.4-14.6 volts to properly charge. Is the alternator/charging system voltage able to be changed/increased to allow for proper AGM charging? Does anyone know what the procedure is? Is a dealer level Scan tool required to do this modification? Thanks in advance.

TRD JON

Administrator

Staff member

Nov 1, 2024

I took my truck on a road trip from NWFL to Arrington Virginia for Overland Expo East. This truck is so freaking nice to drive when compared to my last 3rd Gen. The seats are super comfortable and the powertrain is really enjoyable for being a 4cyl. I averaged around 18 mpg. I know that’s not amazing but I have larger heavier R/T tires, a lift, and other additional weight added to my truck.

Road Tripping From Florida to Virginia

TRD JON

Administrator

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