November 22, 2024 Service bulletin

A battery in a stored vehicle is subject to conditions that can reduce its performance and service life

Toyota technical service bulletin T-SB-0021-24 Rev2 for 2025 Toyota Prius, 2025 Toyota Corolla and 2025 Toyota RAV4 and others.

Bulletin number: T-SB-0021-24 Rev2 (T-SB-0021-24 Rev2)
Component: Unknown or other
Summary: A battery in a stored vehicle is subject to conditions that can reduce its performance and service life. These conditions include storage period, temperature, parasitic drain, and battery load. Because of these factors, battery inspection and maintenance are required in order to ensure proper operation and optimal battery life. Electrified vehicles are equipped with two types of batteries, a High Voltage (HV) battery and a 12V battery. Conventional vehicles are equipped with only a 12V battery. As a matter of policy, Toyota does not provide battery warranty coverage for discharged and/or failed batteries due to lack of maintenance. It is the dealer’s responsibility to maintain the specified State-Of-Charge (SOC) of the vehicle’s battery while in stock and ensure proper SOC at delivery. To reduce customer service concerns due to an undercharged battery, ALL dealers should test the 12V battery and recharge, if necessary, no more than 48 hours before delivery to the customer.

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