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Master Lock Safe Space Portable Storage Box with Combination Lock

Master Lock Safe Space Portable Storage Box with Combination Lock

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Retail:$39.99
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Master Lock Safe Space Portable Storage Box with Combination Lock Keyed Unique ML5900D
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Lock up your valuables with this portable safe. Its 4-digit combination lock will protect your keys, phone, and other small items. Use the attached cable to chain the safe to a nearby object. Store it in your vehicle or carry it when on the go. Lowest Prices for the best vehicle locks from Master Lock. Master Lock Safe Space Portable Storage Box with Combination Lock part number ML5900D can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (3)
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  • Why etrailer?

Master Lock Vehicle Locks

  • Lock Box
  • Master Lock
  • Keyed Unique
  • Plastic

Lock up your valuables with this portable safe. Its 4-digit combination lock will protect your keys, phone, and other small items. Use the attached cable to chain the safe to a nearby object. Store it in your vehicle or carry it when on the go.


Features:

  • Portable locking box provides secure storage for money, cell phones, passports, and other small valuables
  • 4-Digit numerical combination lock
    • Built-in cover conceals and protects combination dials
  • Cable lets you chain safe to fixed object for extra security
    • Combination secures cable lock in addition to main chamber
    • Cable doubles as carrying handle
  • Durable design is lightweight and water resistant
  • Shock-absorbing foam interior provides cushion
  • Access port lets you use headphones or charging cords while box is locked


Specs:

  • Dimensions: 9-1/2" long x 4-7/8" wide x 2-1/4" deep
  • Limited lifetime warranty


Setting the Combination

  1. Open the protective cover to reveal the combination dials.
  2. Rotate the dials to the default combination (0-0-0-0).
  3. Push the door-release button to open the case.
  4. Locate the light gray "set combination" lever on the top of the combination lock on the left-hand side. Move the lever to the right and hold the lever in place.
  5. While holding the lever, move the dials to set your new combination.
  6. Release the lever. The safe will now unlock with the new combination.


5900D Master Lock Safe Space Portable Carrying Case with Cable - Set Your Own Combination

Item # ML5900D






Customer Reviews

Master Lock Safe Space Portable Storage Box with Combination Lock - ML5900D

Average Customer Rating:  5.0 out of 5 stars   (3 Customer Reviews)

Lock up your valuables with this portable safe. Its 4-digit combination lock will protect your keys, phone, and other small items. Use the attached cable to chain the safe to a nearby object. Store it in your vehicle or carry it when on the go.

by:

I bought this locking storage box for my vehicle for when I go on camping trips. I'm very satisfied with this and will probably use it as a daily security addition to my car. I love it. It's the perfect size, I can set the combo to any numbers I want, and it's very portable. I have already found multiple locking points in my car for this box unlike bolt on ones that are permanently fixed in one position. The price was on point and etrailer shipped it to me in a timely manner. Highly recommend!



by:

One of best safe locks I’ve ever had



by:

Nice portable lock box. I especially like the way the cable lock wraps around the box.


3
3

Ask the Experts about this Master Lock Vehicle Locks



  • How to Change Passcode on MasterLock Safe Space Box part # ML5900D
    To set the lock passcode for the MasterLock Safe Space Box part # ML5900D that you referenced you will need to hold the passcode set lever above the dial while you change the code to your desired passcode. When you release it will be set. To get the lever to release the passcode will have to be entered into the box. Since yours doesn't want to move now that you changed it that would indicate that it is set to the last passcode that you entered. Check out the review video I attached as well.
    view full answer...
  • Combination Reset for Master Lock Safe Space Portable Storage Box with Combination Lock
    In order to reset the combination on the Master Lock Safe Space Portable Storage Box # ML5900D, you will need access to the inside of the box. The reset lever is a small, light gray lever on the top left hand side of the combination dial. You will need to push the lever to the right while setting a new combination. I have attached a photo showing the location of this lever for you, as well as a product review video that may help. If the box is closed and the combination is forgotten,...
    view full answer...
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  • Setting the Combination for the Master Lock Safe Place Portable Storage Box # 5900D
    The instructions to set the combination is as follows: Open the protective cover to reveal the combination dials. Rotate the dials to the default combination (0-0-0-0). Push the door-release button to open the case. Locate the light gray "set combination" lever on the top of the combination lock on the left-hand side. Move the lever to the right and hold the lever in place. While holding the lever, move the dials to set your new combination. Release the lever. The safe will now unlock...
    view full answer...
  • Troubleshooting Master Lock Safe Space that Won't Close
    The Master Lock Safe Space Portable Storage Box with Combination Lock # ML5900D has instructions to set the combination. The instructions to reset the code is as follows: Locate the light gray "set combination" lever on the top of the combination lock on the left-hand side. Move the lever to the right and hold the lever in place. While holding the lever, move the dials to set your new combination. Release the lever. The safe will now unlock with the new combination. If you can't fully...
    view full answer...
  • Setting Combination Lock On Master Lock Safe Space Portable Storage Box
    For your Master Lock Safe Space Portable Storage Box with Combination Lock # ML5900D, there is no way of knowing the combination if it is forgotten. Unfortunately there is not a master reset to open a locked box. If the box is new or if the case is open, you can set the combination by doing the following: Open the protective cover to reveal the combination dials. Rotate the dials to the default combination (0-0-0-0). Push the door-release button to open the case. Locate the light gray...
    view full answer...
    Image 1 for
  • What is Default Combination for MasterLock part # ML5900D
    The default combination for the MasterLock part # ML5900D is 0-0-0-0. If you never changed the combo that's what will unlock it.
    view full answer...
  • How to Reset Passcode of Masterlock Combination Portable Personal Storage Safe
    In order to reset the combination on the Master Lock Safe Space Portable Storage Box # ML5900D, you will need access to the inside of the box. The reset lever is a small, light gray lever on the top left hand side of the combination dial. You will need to push the lever to the right while setting a new combination. I have attached a photo showing the location of this lever for you, as well as a product review video that may help. If the box is closed and the combination is forgotten,...
    view full answer...
    Image 1 for
  • Trouble Opening the Master Lock Safe Space Portable Storage Box with Combination Lock
    If your Master Lock Safe Space Portable Storage Box with Combination Lock # ML5900D won't open with your new combination then you may have accidentally entered one of the numbers for the combination incorrectly. I'd try taking turns rotating each number one place above and then one place under the combination that you were trying to set it to. If this doesn't work let me know and I can further assist you.
    view full answer...
  • How Does Password of Master Lock Safe Space Portable Storage Box # ML5900D Reset
    In order to reset the combination on the Master Lock Safe Space Portable Storage Box # ML5900D, you will need access to the inside of the box. If the box is currently locked though that would be difficult. The reset lever is a small, light gray lever on the top left hand side of the combination dial. You will need to push the lever to the right while setting a new combination. I have attached a photo showing the location of this lever for you, as well as a product review video that may...
    view full answer...
    Image 1 for
  • Troubleshooting Why Reset Button of Master Lock Safe Space Won't Depress
    To reset the password of the Masterlock part # ML5900D you need to have it set to the current password and then depress the reset button. It sounds like yours maybe hasn't been set to the correct password before trying to depress the reset button.
    view full answer...
  • Troubleshooting Masterlock Safe Space Portable Storage Box with Combination Lock
    Since the combination has released the cable, I recommend carefully trying to pry the box open with your fingers or a screwdriver. While you're doing this try to go up and down a couple numbers on the dial from the combination you put in to get the cable to release. There is no code that I can give you to unlock it. The only default combination for the MasterLock part # ML5900D is 0-0-0-0. If you never changed the combo that's the only number I would be able to provide you. If none of these...
    view full answer...
  • Opening the Master Lock Safe Space Box When Door Wont Open
    I contacted Master Lock directly regarding the Master Lock Safe Space Portable Storage Box with Combination Lock # ML5900D . The first suggestion was that sometimes even when the correct combination is entered and the numbers are ever slightly offset, it can release the cable while not allowing the door open. The second suggestion was that after trying to realign and reenter the code and it still will not open, using a flat surface tool like a srewdriver may open the door used carefully.
    view full answer...
  • Newly Set Combination on Master Lock Safe Space Portable Safe Won't Open Box
    It sounds like there may have been an issue when setting the combination on your Master Lock Safe Space Portable Storage Box # ML5900D but there are a couple of things we can try to get this back open for you. If you haven't already tried using the starter combination (0-0-0-0) to open the case, I would start with that. If you have, let's move on. It's possible that maybe the combination you were trying to use wasn't set correctly and one of the numbers is off by 1, either up or down....
    view full answer...
  • How to Reset the Combination on the Master Lock Safe Space Portable Storage Box # ML5900D
    Since your Master Lock Safe Space Portable Storage Box # ML5900D is opened you actually have access to the reset button. If you check out the picture I attached you can see the highlighted reset button. simply push this to the right while you set a new combination. I recommend writing the combination down and keeping it in a place that you'll remember in case it is shut and you forget the combination.
    view full answer...
    Image 1 for
  • How to Open Master Lock ML5900D Safe Space Portable Storage Box if Combination is Forgotten
    There isn't any way to reset the combination when the box is locked and the numbers have been scrambled. This leaves 3 options. -1) Replace the box. -2) Begin at 0000 and try each consecutive number until you get the correct combination. Since there's 10,000 possible combinations, this will take awhile and won't be much fun. -3) Try this hack. I haven't tried it on a 4 dial lock, but it works on a typical 3 dial lock. Spin each dial a few times and stop at zero. Then once all dials...
    view full answer...
  • How to Access The Master Lock Safe Space Portable Storage Box with Unknown Combination
    Since there is no "master" way to unlock the Master Lock Safe Space Portable Storage Box # ML5900D after you set the combination you will either need to guess the combination (which should be fairly easy if you only moved one number) or replace the entire unit.
    view full answer...
  • Resetting the Combination on the Master Lock Safe Space Portable Storage Box
    If the set lever on your Master Lock Safe Space Portable Storage Box # ML5900D is not wanting to budge then you either don't have the current combination set or the set lever is seized up. If you forgot the combination and the dials have been scrambled then the only way for you to reset it is to manually go through various combinations until you guess the correct one. Aside from that you'll have to replace the unit. If you do end up getting the correct combination but the set lever is...
    view full answer...
  • Is There an Easy Way to Open the Master Lock Safe Space Portable Storage Box with Combination Lock
    The only way to open the Master Lock Safe Space Portable Storage Box with Combination Lock # ML5900D once it's locked is to either figure out the combination or break the lock itself. Aside from that there are unfortunately (or rather fortunately) no other ways to bypass the combination to open the box.
    view full answer...
  • How Does Password of Master Lock Safe Space Portable Storage Box with Combination Lock Reset
    If you don't know the password of the # ML5900D there isn't a way to reset it. If you do know it you'd need to put in the current password so that you could then move the reset button and while it's held roll the numbers to the new password you want.
    view full answer...
  • Availability of Smaller Underseat Safe for Vehicle
    The Master Lock # ML5900D is really small at 9-1/2" long x 4-7/8" wide x 2-1/4" deep and was designed for underseat use like you are looking for. I attached a review video for more info on it as well.
    view full answer...
  • Locking Key Safe for Ram Truck Key and Locks for Curt Q25 5th Wheel Hitch
    The Master Lock mini key safe, part # 5408D, is pretty small and the part the lock connects to in the safe blocks a decent size key from getting in. I'm not exactly sure what your 2016 Ram 3500's key looks like but I'm fairly certain it's a key fob like in the picture I attached. If so it won't fit in the safe. Instead take a look at the Master Lock Safe Space storage box, part # ML5900D. It's quite a bit larger so pretty uch any car key should fit and it still uses a combination to...
    view full answer...
    Image 1 for

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Cole B
Installed by:
Cole B
Employee Alexander C
Written by:
Alexander C

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