"An armor upgrade package that enhances a vehicle's resistance to anti-armor munitions. This upgrade helps decrease the effects and damage of otherwise lethal hits."
— In-game description
The Active Armor Upgrade is a vehicle specialization featured in Battlefield: Bad Company 2 and is obtained after acquiring 2300 experience points with any vehicle or emplacement. It reduces damage taken by 25%, and is a passive specialization, meaning that it does not require user input to activate as it will always be activated the second a player uses a vehicle or emplacement and will deactivate upon leaving unless another player in the vehicle had the same specialization. It is best used as a driver of a transport vehicle such as a HMMWV, a PBL, or a UH-60 Black Hawk, as they are generally weaker targets and can be normally taken out with one rocket or tank shell.