5 Best Car Key Lock Boxes: Secure Your Spare Key Now

Ever worried about where to safely keep your spare car key? Losing your keys can ruin your day and cost you a lot of money. Finding a reliable place to store a spare key outside your vehicle is a smart move. But when you look for a Key Lock Box for your car, you face many choices. Should you pick a magnetic one or a heavy-duty combination model? It can feel confusing to choose the best box that stays secure and works for your needs.

This guide cuts through the confusion. We will break down exactly what makes a good car key lock box. You will learn about the different types available, what features matter most for security, and how to install one correctly so thieves cannot easily find or remove it. By the end of this post, you will confidently select the perfect Key Lock Box to give you peace of mind. Let’s dive into securing your spare key right now.

Top Key Lock Box For Car Recommendations

No. 1
Upgrade SL-591 Car Key Lock Box, Car Window Lock Box for Turo, Car Window Punch Button LockBox, Vehicle Window Key Box, Vehicle Window Lock Box fit for Ride Share, Turo, GetAround,10 Year Warranty
  • 【Upgraded Version】SL-591 Lock Box is large full metal body with new zinc alloy material and anti-oxidation coating. This makes it strong and safe, corrosion resistant and anti-oxidation. It has been tested to resist external violence. Good protection for stored items. Also includes a smooth protective cover to keep the key pad safe from the elements.
  • 【Meet Your Storage Needs】The Key Storage Lock Box has an interior space of 4 x 2.47 x 1.23 inches. Not only can it meet your needs for storing metal keys, car keys, etc. It can also store cash, cards, garage door opening keys, and other items. Safe and secure storage Lock Box.
  • 【Versatile Use】Our car key lock box is made for car sharing. Perfect for Turo, Getaround and other car sharing services. A contactless rental service for car owners or landlords. Guests can receive a password and use it at any time. Multi-scene installation use and its safe and convenient storage. The perfect solution for homeowners, realtors, property management, vacation homes, caregivers or anyone else to store their keys or other items.
  • 【Easy to Install and Use Design】Back with hook and screw fixing holes. Can be hung on the car window by rolling up the window. Will not scratch the window. Or it can be fixed to the wall or board by screws. Password opening system with familiar phone style keypad, you can easily remember the password and use it skillfully.
  • 【Helpful and Friendly Service】To let you have a pleasant shopping experience. If you receive our SL-591 Lock Box. Have questions about the product or are not satisfied with the product, etc. Please don't be angry or upset. Please let us know. We will provide you with a satisfactory solution!
No. 2
Magnetic Key Box,Hide A Key,Magnet Car Key Holder,Waterproof Hidden Key Holder for Outside Travel,Magnetic Key Holder for Under Car Vehicles (MM2-1, Regular)
  • Waterproof magnetic key holder hide a key magnetic key box for under car hide a key outside hide a key magnetic car magnetic key holder under car magnetic hide a key
  • Very Portable and Secure: Hide your keys with our magnetic key box easily,providing a key lock box for your car that,which make sure your keys safely stored and convenient to access when needed.The case dimensions are 3.5x2.0x1.0 inch inside.
  • Super Strong Magnetic Hold: Our magnetic key lock box features a powerful magnet, securely attached to your car ,no worry to fall off. It is a reliable magnet box to keep your keys hidden and protected.
  • Undercarriage Placement: Designed specifically for underneath the car ,our magnetic key box for under car ensures discreet hiding of your keys.Such an ideal magnet key box is a good solution for extra security.
  • Reliable and Durable: With its magnetic hide a key car design, our super strong box provides a reliable and durable solution for hiding your keys, always feel assured.
No. 3
Piclafe Car Window Lock Box for Turo, Portable Lockbox for Car Keys with Key Labeling Tag, Car Key Lock Box Fit for Ride Share, Turo, GetAround, Large Capacity, Protective Cover, Weather Protection
  • 【Upgraded Quality Construction】The car window punch button lock box upgrated with a non-scratch pad prevents damage to your car window or other surfaces. The car key lock box features a sturdy solid aluminum alloy body and tough ABS plastic coating, making it durable and long-lasting. It also includes a protective cover to keep the keypad hidden from sight and prevent from any weather conditions.
  • 【Versatile and Convenient for Various Applications】The Piclafe car window lock box is a great design for contactless car rental convenience. Avoid the hassle of in-person meetings with our key lock box. Provide guests with a code during pick up/drop off for a simple and time-saving experience. A perfect solution for homeowners, realtors, property management, vacation homes, caregivers or anyone else to store their keys or other items.
  • 【Meet Your Storage Needs】- The key lock box is spacious enough to store your valuables and keep them secure while on-the-go. Internal Dimensions are 4 x 3.2 x 1.2in, ideal for holding house keys and car keys, cash, credit cards, and IDs, etc. This versatile and convenient car safe storage box is a great solution for various applications including rideshare, turo, getaround, and for joggers, surfers, skiers, and anyone who needs to go handsfree!
  • 【Easy Installation and Use】Our key lock box comes with a back hook and screws, so you can hang it on the car window or fix on the wall. It has a 12-digital password keypad featuring thousands of combinations for maximum security. (Note: 1.Please take a photo record or record with a note after setting a new password, forgetting the password will make it unusable. 2.It's not suitable for vehicles with keyless access as the lock box doesn't block the signal. If you would like to try, you could try to line the inside of the box with tin foil).
  • 【Customer Satisfaction Guaranteed】You"ll receive our SL-591 car key lock box, a key labeling tag, all necessary parts and product manual. We stand behind our product and offer free replacement if you're not satisfied or there's a problem with the product quality. Buy with confidence!
No. 4
Master Lock Key Lock Box, Outdoor Lock Box for House Keys, Portable Combination Lockbox Resettable Code, 5400EC, Black
  • Large capacity key lock boxes enables secure storage of up to five standard (2 inch) house keys; Shackle fits most ball, biscuit, and tulip door knob styles
  • Set your own four-digit combination lock box; Reset the combination for thousands of personalized combination code options
  • For indoor and outdoor use; Key safe is constructed with a metal body for durability, vinyl coated shackle to prevent scratching, and shutter door to protect combination dials from weather
  • SPECIFICATIONS: Exterior dimensions: 6-1/4 in (158.75 mm) height, 3-1/4 in (82.55 mm) width, 1-1/2 in (38 mm) depth; Lock box shackle is 1-13/32 in (36 mm) long, with 1-7/8 in (48 mm) width, 13/32 in (10 mm) shackle diameter
  • Capacity for 5 standard (2 inch) house keys; Interior dimensions: 1 in (25 mm.) height, 2-13/32 in (61 mm.) width, 1 in (25 mm.) depth; capacity for 5 standard keys
No. 5
Magnetic Key Box for Under Car, Hide a Key Outside with Combination Lock Box, Resettable Safe Security Code Lockbox with 5 Strong Magnets, Anti-drop Magnetic Holder Under Car, Truck, Outdoor (1,Black)
  • Stronger magnetic attraction: The magnetic key box is equipped with 5 strong magnets,which can be firmly fixed on any metal parts under the chassis;the magnetic force is far superior to other password key boxes with only 1 magnet;Even in various complex and bumpy road conditions, it can still stick to the chassis and will not fall off
  • Double insurance: Secure Combination Key Hiders comes with a 4-digit password,which can be reset at will,making the hidden key safer;It is very difficult for strangers to open it
  • Durable material: In order to be able to be used under the car for a long time, the magnet key box is made of ultra-durable material to ensure that it will not be damaged in long-term use; equipped with soft sponge pads, card sleeves and waterproof bags to reduce friction and protect the items stored inside
  • Product size: 3.7" x 2.4" x 1.3",and it also comes with 3 waterproof bags of different sizes,which are waterproof and dust-proof to better protect your items
  • Multiple uses: The magnetic hidden key chain is suitable for storing spare keys;in case of emergency,avoid the embarrassing situation of locking yourself out of the house and the door;in addition,we can also use it to place valuables such as locators,bank cards and cash
No. 6
Puroma Key Lock Box, Portable Combination Lockbox Wall-Mounted Key Storage Box for House Keys, Resettable Code Safe Security Lock Box for Home, Office, Apartment Spare Key Storage (1 Pack, Gray)
  • 2 Installation Methods: It comes with a removable lock shackle so you can hang the portable lock box on a door knob or someplace. Or you can securely mount it on the wall of your home or office with the provided 4 screws and 4 expansion plugs. (Notice: Please open the lockbox to find the removable shackle.)
  • Sturdy Security Lockbox: Puroma Key storage lock box is made of high-quality aluminum alloy and steel to keep your keys safe. Rustproof, cut-resistant and effective resistance to violent damage caused by hammering, sawing, or prying open.
  • Easy to Use: The lock box code is pre-set with 0-0-0-0, you can reset your new custom 4-digit code in 4 simple steps. The numbers of dials are easy to move, providing you with 10,000 possible combinations. Safe and convenient.
  • Large Capacity: The key lock box has a large internal storage space for safely storing your house keys. You can put your keys in the lockbox for emergency entry when you go out for business or a trip. Never worry about losing your keys.
  • Wide Application: This key lockbox is rust-proof, corrosion-resistant, and weatherproof, suitable for home, office, garage, apartment entrance, and rental house's key storage. Perfect for Airbnb realtors, cleaners, pet sitters, etc.
No. 7
Magnetic Key Box,Hide A Key,Magnet Car Key Holder,Waterproof Hidden Key Holder for Outside Travel,Magnetic Key Holder for Under Car Vehicles (MM1, Regular)
  • Waterproof magnetic key holder hide a key magnetic key box for under car hide a key outside hide a key magnetic car magnetic key holder under car magnetic hide a key
  • Very Portable and Secure: Hide your keys with our magnetic key box easily,providing a key lock box for your car that,which make sure your keys safely stored and convenient to access when needed.The case dimensions are 3.5x2.0x1.0 inch inside.
  • Super Strong Magnetic Hold: Our magnetic key lock box features a powerful magnet, securely attached to your car ,no worry to fall off. It is a reliable magnet box to keep your keys hidden and protected.
  • Undercarriage Placement: Designed specifically for underneath the car ,our magnetic key box for under car ensures discreet hiding of your keys.Such an ideal magnet key box is a good solution for extra security.
  • Reliable and Durable: With its magnetic hide a key car design, our super strong box provides a reliable and durable solution for hiding your keys, always feel assured.
No. 8
Lifronkit Car Window Punch Button Lock Box, Black Portable Car Key Lock Box, Sturdy Waterproof Large Capacity Lock Box for Turo, Ride Share, GetAround Anti-Theft Devices for Vehicles
  • Multi-Purpose Lock Box - The car window lock box is perfect for storing your valuables when you're on the go. From house keys, car keys, and fobs, cash, credit cards, and IDs, this versatile and convenient car safe storage box has you covered. Ideal for rideshare, turo, getaround, joggers, surfers, skiers, and anyone who needs to go hands-free!
  • Easy to Install and Use - Our key lock box comes with a back hook and screw fixing holes, so you can hang it on the car window without scratching it. It can also be fixed on the wall by screws. The included small screwdriver is convenient for you to set the password, and the metal button is more convenient to use. The numbers are clearer, even the elderly can use it easily.
  • Sturdy and Durable - The lock box for keys features high-strength aluminum alloy body and tough ABS plastic coating, making it strong, safe, and corrosion-resistant. It includes a smooth protective cover to keep the keypad safe from any weather condition.
  • Ultimate Security - Our Car key lock box has a 12-digit password keypad featuring thousands of combinations for maximum security. (Note: 1.Please take a photo record or record with a note after setting a new password, forgetting the password will make it unusable. 2.It's not suitable for vehicles with keyless access as the lock box doesn't block the signal. If you would like to try, you could try to line the inside of the box with tin foil).
  • Risk-Free Purchase - Our car lock box comes with a lock box for keys, all necessary parts and product manual. Enjoy a completely risk-free purchase with our 12-month warranty, 30-day free returns, and replacements.

Your Guide to Choosing the Best Key Lock Box for Your Car

Losing your spare car key can be a real headache. A key lock box offers a simple, secure solution. It lets you safely store an extra key outside your vehicle. This guide helps you pick the right one for your needs.

Key Features to Look For

When shopping, certain features make a lock box much more useful and safe.

  • Locking Mechanism: This is very important. Look for a strong combination lock. Push-button or dial combinations are common. Make sure the numbers are easy to read and turn. Some high-end boxes use fingerprint scanners, but simple locks usually work best for most people.
  • Size and Capacity: Check the inside dimensions. Will it fit your key fob, or just a traditional metal key? Fobs are bigger, so measure yours first.
  • Weather Resistance: Your box will sit outside in the sun and rain. Look for water-resistant seals or materials that won’t rust easily.
  • Mounting Options: How will you attach it to your car? Some boxes simply hang on the door handle. Better boxes allow you to firmly bolt the box to the car’s frame or undercarriage.

Important Materials

The material of the lock box greatly affects how long it lasts and how secure it is.

Strong metals are best. Look for boxes made from solid, heavy-duty materials like hardened steel or aluminum alloy. These materials resist attempts to pry them open or smash them. Thin plastic boxes offer very little protection. A solid metal casing tells thieves to move along.

Factors That Improve or Reduce Quality

Not all lock boxes are made equal. A few details separate the good from the weak.

Quality Boosters:

  • Thick Walls: Thicker metal walls make the box harder to cut through.
  • Protective Coating: A powder coat finish stops rust and makes the box less noticeable.
  • Secure Shackle/Hanger: If it hangs, the shackle (the metal loop) should be thick and hard to cut.

Quality Reducers:

  • Lightweight Plastic: These break easily.
  • Flimsy Hinges: Weak hinges are the first thing a thief targets.
  • Exposed Screws: Screws that are easy to access can be quickly removed.

User Experience and Use Cases

Think about when and how you plan to use the box.

Common Use Cases:

  • Emergency Access: If you lock your keys inside, you need quick access. The combination should be simple enough for family members to remember but hard for strangers to guess.
  • Sharing Keys: If you lend your car to a friend or house sitter, you can leave the key securely hidden.
  • Rideshare Drivers (Uber/Lyft): Drivers sometimes use these to store a second key or access fob securely in the vehicle when they are not present.

User Experience Tips: Test the lock mechanism several times before you trust it with your only spare key. Make sure the box stays hidden, even if someone looks closely at your car.


10 Frequently Asked Questions (FAQ) About Car Key Lock Boxes

Q: Are key lock boxes safe enough for my car key?

A: Yes, if you choose a heavy-duty metal box. A cheap plastic box is not safe. Look for solid steel construction and good mounting.

Q: Can I leave the key fob inside the box?

A: Most modern key fobs use radio signals. If the metal box is thin, the signal might still get out. Check if the box is specifically advertised as “RFID-blocking” if you are worried about signal relay theft.

Q: Where is the best place to install the lock box?

A: Under the vehicle frame or attached securely to the tow hitch area are common spots. Choose a location that is hard to see from street level.

Q: How often should I change the combination?

A: If you only use it for emergencies, you do not need to change it often. If you share the code, change it immediately after the other person has the key.

Q: Will the lock box damage my car’s paint or frame?

A: If you bolt it on, use rubber padding between the box and the car body to prevent scratches. Hanging boxes usually do not cause damage.

Q: What should I do if I forget the combination?

A: Combination models require you to know the code. That is why you should write down the code in a very safe, non-car-related place. Key boxes with physical keys are an option if you fear forgetting codes.

Q: Do key lock boxes rust?

A: They can if they are low quality. Boxes with a strong powder coating or those made from aluminum resist rust much better than basic steel models.

Q: How big should the box be?

A: Measure your largest key or fob. Buy a box that is slightly larger than that measurement to ensure easy placement and retrieval.

Q: Are these boxes easy for thieves to remove?

A: If you use the bolt-down feature, removal is very difficult. If you only use the hanging feature, a thief can cut the shackle or simply pull it off quickly.

Q: Are there lock boxes that attach inside the car?

A: Some smaller, flat models are designed to stick inside the glove compartment or under the seat using strong adhesive. These are less weather-resistant but offer great concealment.

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