Ford Explorer 12V Battery Size and Replacement (2015–2016)
The short answer
For a 2015 Ford Explorer, the replacement 12V battery is commonly listed as BCI Group 65. A group size is an industry code that sets the case dimensions, terminal positions and terminal type, so it determines whether a battery physically fits the tray and reaches the cables. Group 65 batteries are also commonly listed for the 2016 Explorer. However, some parts catalogs show an alternative fitment for certain 2016 vehicles. Confirm against your own vehicle before buying rather than relying on the model year alone.
This guidance is general and was not checked against a specific Ford parts catalog for this article. Treat it as a starting point and confirm it with the steps below.
Conditions that can change the answer
Factory battery type: if the original battery is an AGM (absorbent glass mat) unit, replace it with an AGM battery rather than a standard flooded battery, even if both come in the same group size. Trim and powertrain: the 2015–2016 Explorer was sold with several engines. Battery listings are usually the same across them, but a catalog may separate fitment by engine or trim, so check against your exact configuration. Police Interceptor Utility: the police version of the Explorer can have different electrical equipment from civilian trims. Do not assume a civilian listing applies to it. Market: these notes concern North American vehicles. Explorers built for other markets may use different battery standards and labeling. Previous replacements: a previous owner may have fitted a different size. The battery currently in the vehicle is not proof of the factory specification.
How to confirm the correct battery
Read the label on the installed battery for the group size, battery type (flooded or AGM) and cold cranking amps (CCA). CCA measures how much current the battery can deliver for starting in cold weather. Check the owner's manual or the battery section of the Ford service information for your model year. Give your VIN to a parts counter or a Ford dealer. A VIN lookup accounts for trim, engine and options that a year-only search can miss. If listings for a 2016 Explorer disagree, ask the seller which specification their listing is based on before you buy.
Choosing a replacement
Match the confirmed group size and battery type, and choose a CCA rating at least equal to the original battery's. Exceeding the original CCA rating is generally acceptable. Falling below it can mean weaker starting in cold conditions. This article does not include prices, warranty terms or brand comparisons, so compare those details at the point of purchase.
Replacement notes
Many Ford vehicles from this period use a battery monitoring sensor on the negative battery cable. The sensor helps the charging system manage the battery. If your Explorer has one, Ford's procedure includes resetting the battery management system after a new battery is installed, so the system does not treat the new battery as the old, worn one. The reset may require a scan tool, or it may be done at a dealer or shop. Whether your vehicle has the sensor, and which reset method applies, should be confirmed in the service information for your model year.
After the swap, expect to reset items that depend on constant power, such as radio presets or the clock. If warning messages persist or the engine cranks slowly with a new battery, have the charging system tested rather than assuming the battery is faulty.