If you gain access to any of the MW4 DMZ bank vaults, you can pick up some serious cash alongside other valuable loot. Cash itself, though, is perhaps one of the most valuable resources you can exfil with thanks to DMZ's Vendor, who will sell you weapons and gear before your next mission - but they don't come cheap, making bank heists a worthwhile endeavor.

Pretty much everything you need for a bank heist can be found in or around the bank itself, but it's not entirely obvious what you need to actually do to get the vault open, so if you're looking to crank the vault door open for yourself, here's what you need to know.

There are four bank vaults in the MW4 DMZ map: One north of Songdo Wharf, another to the south of Wolves Stadium, one inside The Grid, and another in Cheongun Village.

The three banks not located within The Grid are smaller bank branches and are much easier to loot as The Grid is an extreme-threat area. If you're heisting for the first time, I'd recommend starting with the eastern-most bank branch, to the north of Songdo Wharf.

To open DMZ bank vaults, you need three things: a car battery, a keycard, and a note showing most of the vault's unlock code. With these things in hand, follow these steps to unlock the vault:

Of course you'll be challenged during this process as your enemies will come after you, so take them out as and when they appear, particularly if you're tackling the main bank tower in The Grid.

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