Utility Maintenance Storage Key Location in MW4 DMZ
The Utility Maintenance Storage Key opens a maintenance storeroom at the reactor. Its locked room is at Haneul Nuclear Reactor.How to get the key
Last updated Game version: Launch (October 23, 2026)
Quick answer
- Where
- Haneul Nuclear Reactor
- The door
- A maintenance storeroom at the reactor.
- What is inside
- Not confirmed yet. Loot changes every match.
- Getting the key
- Not confirmed yet; keys turn up as loot.
- Threat there
- High at Haneul Nuclear Reactor
Where the Utility Maintenance Storage is
| Location | Haneul Nuclear Reactor |
| Highest threat at Haneul Nuclear Reactor | High |
See Haneul Nuclear Reactor on the interactive Hajin map, and the threat level by area in our Haneul Nuclear Reactor location guide.
What the Utility Maintenance Storage Key opens
A maintenance storeroom at the reactor.
How to get the Utility Maintenance Storage Key
Where this key drops is not confirmed yet. Keys turn up as loot, a Lieutenant you kill may drop the key to their own loot room, and some Story Missions pay keys as rewards.
Keys can go in your Stash between deployments, but anything outside a Secure Slot is lost if your exfil fails. Tick the keys you have in the MW4 DMZ key finder; the list stays in your browser.
Other keys at Haneul Nuclear Reactor
- Reactor DRC Locker (grid H4): The DRC Weapons Locker inside Reactor 02's irradiated pool.
- The Chemist's Secure Armory (grid I4): The secured bunker near the boat house at Haneul Nuclear Reactor.
- Reactor 02 Control Room (grid H4): The control room inside the Reactor 02 building.
- Hazard Storehouse (grid I5): The material storage warehouse south of the reactor's cooling towers.
Questions
Where is the Utility Maintenance Storage Key used in MW4 DMZ?
At Haneul Nuclear Reactor. It opens a maintenance storeroom at the reactor.
Every confirmed MW4 DMZ key with its own page
- Counting Room Vault
- Mirae Electrical Room
- Shop Records Room
- Gun Store Weapons Locker Key
- Shopping DRC Locker
- Reactor DRC Locker
- Coin Mining Den
- Supreme Leader's Bunker Access Card
- Roze's Highrise Armory
- Vault Armory
- The Citadel South Wing
- Old Barber Shop
- Rail Depot Storage
- Militia Arms Depot
- Haksan School Armory
- Re-Education Center Annex
- Imjin Mill Foreman's Office
- Hoesik Supply Room
- Air Base DRC Weapons Locker
- Iskra's Control Room
- Netshin IT Room
- Police Weapon Depository
- The Chemist's Secure Armory
- Gangbyeon Apartment B
- Airbase Armory Keycard - Single Use
- Hanex Guard Station
- Lucera Suite 703 Bedroom
- Reactor 02 Control Room
- Utility Maintenance Storage
- Weapons Mod Workshop
- Executive Arms Auction
- Hazard Storehouse
- Police Station Armory
- Mechanic's Shack
- Air Base Access Card - Multi Use
- Commandant Office
- Gas Station Electrical Room
- Jang-ui's Converted Power Room
- Jin-Tae's Private Lounge
- Mill Explosives Lab
- Prison Encampment Storage
- Underground Propaganda Store Room
- The Doctor's Command Office
- South Block Armory
- The Citadel Main Control Room
- The Citadel Secondary Control Room
- Field Depot - B5
- Fire Station Storage
- Gangbyeon Apartment A
- Haejeok Radio Station
- Hanwoori Art Records Room
- Hotel Lucera Lobby
- Kang's Arms Incinerator
Official sources
Continue reading
Next stepGot this key? Tick it off and find the next one in the key finder.MW4 DMZ Keys: Locations and Locked RoomsEvery confirmed DMZ key: where it is, its Tac-Map grid square, which door it opens and what players found inside.Go there Related guides
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