X01 Maintenance Room Keycard in MW4 DMZ: Route and Loot

The Maintenance Room is a Rare keycard in MW4 DMZ for X01, the Season 1 black site. It opens a room at the top of the Production Assembly on the Data Center floor, grid E5, next to fenced pipework. You can find the card in the field, or make it yourself by encoding a blank keycard at a Keycard Encoder Station. Below is how to get the card, where the door is, how to climb up to it and what we found inside.

Where the Maintenance Room Door Is

The Maintenance Room is in X01 on the Data Center floor, in the Production Assembly, the big hall in the middle of the floor with the robot arm icon on the tac map. The keycard calls it the 3rd floor Maintenance Room next to fenced pipework, and that is exactly where it is. The room sits on the top level of the Production Assembly, in its southwest corner in grid E5. Right in front of it is a room with a big silver insulated pipe behind a red fence along the wall. The Maintenance Room is the plain metal door at the far end of that room, with a red no-entry sign above the card reader on its right. The door is also on our interactive MW4 DMZ map under the X01 keys layer.

How to Get the Maintenance Room Keycard

There are two ways to get the Maintenance Room keycard. You can find it as field loot, or you can encode it yourself from a blank keycard. Encoding takes a few steps.

1. Get an Encodable Blank Keycard. It is an Epic item, and its tooltip says it can be encoded on a Keycard Encoder Station within X01. Page 1 of the X01 orders pays out two of them, and you can print more at the X01 3D Printer for 6 Printed Circuit Boards and 8 Control Units.
2. Take the blank into X01 and go to a Keycard Encoder Station. It looks like a white ATM with a screen and a card slot. We used the one on the east side of the Supply Depot, grid F2 on the Data Center floor, which is pinned on our X01 map. The map also shows a second station on the east edge of the Data Center.
3. Use the station. The Encode Keycard menu has two options, Maintenance Access and Executive Access, and each one shows x1 for the one blank keycard it uses. Pick Maintenance Access.
4. Wait for the encoding to finish. The screen shows a progress bar, and in our run it went from start to 100% in about 15 seconds. You do not have to stand at the station while it runs, so you can check the room around it in the meantime.
5. At 100% the finished card pops out of the station. Walk up and pick it up. It shows up as the Rare Maintenance Room keycard, and its tooltip sends you to the 3rd floor next to fenced pipework in the Production Assembly.

The keycard also drops in the field. On an earlier run one was in a jacket on the coat rack inside the X01 Executive Room, which is the other keycard you can encode at the same station. Keycards roll randomly, so treat that as an example and not a fixed spot.

To get into X01 you can pick it straight from the FOB deploy menu, as its own location with Free Roam, and you spawn inside the facility. On launch day the way in was the freight elevator in the far north of Hajin. Our X01 entrance guide covers both ways in, and every key on Hajin is in our MW4 DMZ keys guide.

The Route to the Door

1. Get to the Production Assembly hall on the Data Center floor of X01 and find the metal staircase in the southwest part of the hall. Take it up to the catwalk and follow the catwalk to the yellow ladder on the corrugated wall.
2. Climb the ladder. At the top, cross the open floor to the concrete staircase and take it up to the top level.
3. Go through the doorway into the room with the big insulated pipe behind a red fence. The Maintenance Room is the door at the far end, with the red no-entry sign. Swipe the keycard at the card reader on its right.

What Is Inside the Maintenance Room

Behind the door is a dim equipment room with rows of white server racks and electrical cabinets, a desk with a phone, a pair of filing cabinets and a window into a tiled room. One corner is lit red. We opened 14 containers, all inside the room. There are four server blades in the racks, five military lockers along one wall, two filing cabinets, a footlocker (the MINA MS41 crate) by the window, a military bag under the desk and a supply crate in the red corner, plus one valuable on a metal shelf.

The best single find was not in a container. Animal Trial Records: R-4, a Rare valuable worth $3,000, lay on the metal shelf next to the lockers. The server blades gave the most in total. One held an Encrypted Archive worth $2,000 and a Rare CPU, another an Epic Comms Module, and the others Control Units, Detonators and resources. In the military lockers we found Epic Alloyed Plating, Rare High-Tenacity Fibers, four armor plates and a couple of grenades, and the supply crate had Infantry Invasion Plans and Ballistic Flight Logs. The filing cabinets only held resources.

Is the Maintenance Room Keycard Worth It?

Yes, as long as you are close by. If you are already around the Production Assembly, it is a quick stop with 14 containers. If you are far away on the other side of X01, better skip it.

If you are making the card from a blank keycard, ask yourself why you would pick this blue Rare card. The same blank at the same encoder also makes the Legendary Executive Room keycard. From the one opening we recorded, the Maintenance Room held at least $12,650 in loot, with a Rare valuable worth $3,000 on a shelf and an Encrypted Archive worth $2,000 in a server blade, plus two Epic 3D printer parts.

More X01 keycards with their route and loot: the Audit Room, the Small Test Chamber, the Executive Room, Deep Vault 301, Deep Vault 106, Deep Vault 406, the Superintendent’s Office and Lt. Chol-Min’s Stash Room.

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