The Hanex Bank vault puzzle in Call of Duty: Modern Warfare 4 requires a Car Battery, a keycard hidden inside the branch, and a four-digit code with one missing number. You find the first three digits on a note, then work out the last digit at the vault. Both Cheongun Village and Wolves Stadium use this setup, and DMZ Orders page 20 directs you to either branch. Find the power panel first, collect the card and note, and you can finish the puzzle without searching for a complete code.
What do you need to open a Hanex Bank vault?
Bring a Car Battery before heading to the bank. Gas Stations around Hajin can contain them, so either deploy with one or search a Gas Station during the match. The battery goes into an electrical panel inside your chosen branch to restore power.
The other requirements are found inside Hanex Bank: the Bank Branch Vault Access keycard and a note containing the first three digits of the vault code. Both have random spawn locations within the building, so check floors, shelving, and tables rather than heading straight for the locked door.
These Hanex branch puzzles are part of DMZ on Hajin. If you want the broader mode context before chasing vaults, the DMZ mode overview explains where it fits into MW4.
Where are the Cheongun Village and Wolves Stadium branches?
Use the Clinic/Hospital as your landmark in Cheongun Village, or the Gas Station at Wolves Stadium. The requirements are the same at both banks, but the electrical panels and keycard doors are in different places.
| Branch | Bank location | Electrical panel | Keycard route toward the vault |
|---|---|---|---|
| Cheongun Village | East of the Clinic/Hospital | Downstairs in the basement parking garage, on the left | Use the card in the back office room |
| Wolves Stadium | To the left of the Gas Station | Through the doors behind reception, on the wall | Use the card on the door to the right of reception |
Modern Warfare 4 DMZ Guide: Hanex Bank Vault Puzzle Solution
Where is Cheongun Village's power panel?
Enter the Cheongun Village branch and take the stairs down into its basement parking garage. Look to the left for the electrical panel, then insert your Car Battery. After finding the keycard and reading the code note, use the card in the back office room to reach the vault door.
Where is Wolves Stadium's power panel?
At the Wolves Stadium branch, go through the doors behind reception. The electrical panel is on the wall beyond those doors. Insert the Car Battery there, then search the bank for the card and note. Your keycard door is to the right of reception.
How do you find the vault keycard and code note?
Search inside the branch for the Bank Branch Vault Access card. Useful places to inspect include the teller area, shelving, tables, and the floor. At Cheongun Village, the card can appear on the floor behind the teller windows among loose cash. At Wolves Stadium, it can appear on the teller counter.
Those teller-area spots are places to check, not fixed pickup locations. Keep searching the rest of Hanex Bank if the card is elsewhere.
Modern Warfare 4 DMZ Guide: Hanex Bank Vault Puzzle Solution
The Hanex Bank note supplies the first three digits of the four-digit vault code. Check tables, shelves, and floors throughout the building, including around the stairs. Read the note and keep those three digits in their original order for the keypad step.
How do you solve the missing vault code digit?
Once Hanex Bank has power and you have the keycard, follow your branch's keycard route to the vault. Enter the three digits from the note, then test the final digit using 1 through 9 until the door opens.
- Insert the Car Battery into the branch's electrical panel.
- Collect the Bank Branch Vault Access card and read the code note.
- Use the keycard at the branch's access door.
- Enter the note's three digits followed by 1.
- If that attempt fails, keep the first three digits unchanged and try the next final digit, continuing through 9 as needed.
Change only the final digit between attempts. The note has already supplied the rest of the combination, so there is no reason to guess all four numbers.
Modern Warfare 4 DMZ Guide: Hanex Bank Vault Puzzle Solution
What is inside the Hanex Bank vault?
Hanex Bank branch vaults contain safes and loose cash. Gold Bars and Gold Skulls are possible safe contents, but neither is guaranteed. Documents can also appear inside, including Cipher Code Ledgers and Nuclear Program Files.
Opening the branch vault also matters for DMZ Orders page 20, including the Find a Way Inside the Vault objective. Cheongun Village and Wolves Stadium are the branches named for that task. If you want a different objective after your bank run, the MW4 game modes guide explains the other modes.
Modern Warfare 4 DMZ Guide: Hanex Bank Vault Puzzle Solution
What should you check if the vault stays locked?
Recheck power, access, and the code
Work through the Hanex Bank requirements separately: battery installed, Bank Branch Vault Access card collected and used, and the note's first three digits entered correctly. The card handles access, while the keypad still requires the four-digit combination. Keep the known digits unchanged while trying the missing number.
Check that you have the branch card
The Hanex Guard Station key is a different item. It opens the guard room near the vault in the Hanex Bank tower within The Grid, not a branch vault. For the Cheongun Village or Wolves Stadium puzzle, look for the Bank Branch Vault Access card inside that branch.
With the Hanex Bank vault open, browse the MW4 guide collection to plan your next objective.
