Magnetic key holder for car – Top 5 best magnetic key holder for under car reviews, Buying Guide & FAQ

Are you looking for a secret way to store your car keys?

How about a magnetic box that you can stick under the car?

That way, you would never be locked out of your car without the key. The discreet design keeps the key safe, and compact design helps you stick it under your car. Since it is used to hold keys, you must find a reliable option that doesn’t drop off.

To help you buy such a magnetic key holder for car, I have gone through numerous magnetic boxes, their customer reviews, form factor, photos, and videos to compile the best 5 options. Below the list, I have included a buying guide to make buying a magnetic box for holding keys easy.

1. Spy Spot Waterproof Magnetic Strong Stash Box



Without boring you with the details, this box can hold not only keys but also GPS devices, jewelry,, etc. Discreet design makes it easy to hide. Dimensions of 5.5″ x 3.5″ make it not too large or too small.

Of course, it is waterproof, and therefore your key fobs and GPS devices are safe. If one goes through the image and videos of this product, one would realize it has multiple magnets underneath. That way, it has excellent adhesion power to stick underneath the car and doesn’t fall off.

Cushioned interiors ensure that the contents do not suffer from scratches. Reliability is what has propelled it to the top of my list.


  • Waterproof
  • Versatile
  • Multiple magnets
  • Cushioned interiors
  • Not too large, not too small


  • Hinge design can be better


2. Gorilla Box Heavy-Duty Waterproof Magnetic Stash Case



The extra large size of this magnetic box helps it stand out among others. Of course, extra large magnetic box requires powerful magnets. This box doesn’t disappoint in that regard because of the rustproof neodymium magnets. Consequently, it can handle a separation force of up to 50 lbs.

As for construction, it uses PC and ABS materials. If you are wondering about the dimensions of the extra large box, those are 4.29″ x 2.95″ x 1.46″ (interior).

Large size means one can store key fob, traditional keys, cash, batteries, GPS trackers, and many other things individually inside the extra large box.

If one needs a small size, that is available as well. There are two color options, and that is an additional advantage. Large size and powerful magnets certainly help it stand out.


  • Two size options
  • Powerful magnets
  • Waterproof
  • Sturdy construction
  • Extremely versatile


  • Screws holding magnets can be better designed


3. Magnetic Container with Twin Neodymium Magnets



Highlight of this magnetic key holder is that it consists of 2 neodymium magnets, making it more reliable since the box will stick to the surface. Beside car keys, the box is suitable for jewelry, cash, fobs and other small devices.

Weatherproof design ensures that the contents of the box will remain safe. Discreet design keeps the box hidden.

If you want to place a GPS tracker within the box you can do that as well. Since it can handle rain and snow, the GPS tracker will remain safe. Dimensions of the box are 3.3″ x 2.7″ x 1.8″.

Magnets are designed to stick to any metal surface which makes the magnetic key holder extremely accurate.


  • Suitable for car owners and bikers
  • Consists of two neodymium magnets
  • Weatherproof design
  • Compatible with GPS trackers
  • Extremely durable
  • Weatherproof


  • Magnet design can be better

4. Locker BOXX Waterproof Hide A Key


I primarily like this magnetic key box hider because it is suitable for car keys and GPS tracker devices. Whether you want to keep the keys safe or want to track your vehicle anywhere it goes; this one is certainly a good choice.

While searching for a magnetic box under the car, it is important to look at the interior dimensions. That will help you understand what you can keep inside it and what you cannot. The internal dimensions are 3.25″ x 1.75″ x 1.5″. That is why; you can keep car keys easily inside it.

When you look at the magnets, it consists of two neodymium magnets. Due to the same, it becomes easy to stick it under the frame of your car.

In addition to car keys, you can also use it while fishing, kayaking, paddle boarding, biking, and even running. The applications are virtually endless.

A waterproof design ensures that the contents inside will remain completely dry even if it is submerged in water.

The heavy-duty hinges ensure that it will last for years together. That is why replacement won’t be required.

Thus, go with this one when you’re looking for a reliable magnetic hide a key holder.


  • Compatible with GPS tracker devices
  • Consists of two neodymium magnets
  • Extremely versatile
  • Waterproof


  • Finishing can be better


5. MagnetPal Magnetic Key Hider For Cars


Are you looking for a magnetic spare car key holder?

If so, this one in the shape of a lock, is certainly a good option.

This car key hider comes with a ring as well. That is why, if you want to use it as a keychain, that is certainly possible. When not using it as a keychain, you can stick it underneath your car with a magnet that comes along with it.

Compared to many of the other boxes, this one consists of a larger magnet. That is why, once you stick it underneath the car frame, it will remain in place. Even if the magnetic box for the spare key consists of a heavy object like a GPS tracker or anything else, it will remain in place because of the powerful magnet.

Even though it is made from metal, it consists of a plastic liner. The job of the plastic liner is to ensure that rust does not impact the box. Due to the same, whether you speak about the magnet or the case itself, rusting won’t occur.

In total, the pressure that the magnet can handle is 12 lbs. That way, it will remain in place. That is only possible because of the neodymium magnet.

In case, you want to use it indoors rather than in your car; you can do that as well.

When looking for a magnetic box for under-car which comes with a powerful magnet, you can go with this one.


  • Powerful neodymium magnet
  • Unique shape
  • Metal construction with a protective liner
  • Can handle 12 lbs of pressure


  • Packaging needs improvement


When looking for a reliable way to store your keys, these magnetic key holders for cars are perfect for you. I’ve gone through numerous key hider for car options to compile this list of top 5. I will now share a buying guide to help you select between these 5 options.

Magnetic key holder for car buying guide

The buying guide will apprise you about the parameters to consider while comparing the magnetic key holder for cars.

Things to consider before buying a magnetic key holder for car:

The things which you should keep in mind include:

• Magnets:

You have to first and foremost look at the number of magnets on offer. Ideally, two magnets should be present. You have to also ensure that the sticking power of the magnets is on the higher side. Only when that is the case can you go ahead and buy that key holder.

• Versatility:

You have to look at the space available inside the key holder for car. Space should be such that you can use it for keys, GPS trackers, and so on. If it has a multipurpose design, that is a definite advantage.

• Weather resistance:

You have to also choose one that can handle any weather. If it is waterproof, that is a definite advantage. The weatherproof construction will protect the keys inside and keep them entirely safe.

• Casing quality:

The casing next needs to be sturdy. Only then, the keys will be well protected.

Once you compare the top 5 best magnetic key holder for under car use on these five parameters, choosing the right one will be easy. I will now answer the FAQs to inform you more about such a key holder.


Where to put a magnetic key holder for car?

Ideally, you should stick the magnetic key holder underneath the car. It is perfect for sticking beneath the chassis. In that way, it remains not only discreet but also secure. Moreover, since only you would know where it is, you can access the keys easily.

Are car keys magnetic?

Car keys made of iron, steel, or nickel are magnetic. If none of these metals are present in your car keys, they aren’t magnetic.

Can magnets ruin car keys?

Magnets won’t ruin car keys. In most cases, the magnetic field can affect instruments like hard disk. Other than that, the magnets do not affect the transmitters in the car key fob or the car key itself. That is why; you can easily keep the car key in the magnetic holder without worrying about spoiling the car key.

Can magnetic key holders be broken into?

Usually, magnetic key holders are quite secure. However, they can be broken into with the right tool like a saw or other brute force tool.

Where can I put a magnetic key holder in my car?

There are a few places to keep the key holder. These include:

• Tire well
• Inside the flap of the gas tank
• Hitch receiver box
• Back of front license plate

How to block FOB signals if the case doesn’t block RFID?

You need to wrap the key fob in a metal sheet like aluminum foil and place it in the case. The aluminum foil will block the key fob signal, and the key fob will remain secure in the case.

Are these magnetic key holders secure?

The magnetic key holder is secure under normal circumstances. However, against a saw or brute force, they might not hold for a long time.

Can you keep key holder stuck during car washes?

While the magnets in the magnetic key holder are waterproof but if water is directly applied to the key holder, it will fall. That is why it is better to remove the magnetic key holder before washing your car.

How long do these key holders last?

Usually, these key holders can last for 5 to 7 years. In case they are exposed to water frequently, their lifespan can decrease by a year or so.

Is attaching magnetic key holder to car safe?

It’s not a foolproof way but if you hide it well, your car keys will be safe. As for the magnets, they are powerful enough to keep the case stuck to the car despite jerks and shocks, a car usually experiences.

If you’re looking for a secure way to store the keys, my list of magnetic key holders above will certainly help you out. You can choose from the 5 options above using the buying guide. Now, you will not have to worry about the forgotten keys ever. You can simply use the spare key in the magnetic key holder for car underneath the car to unlock it.

If you’re looking for any other car accessories, you can go through our posts like Hard shell roof top cargo carrier, Portable cd player for car, and car tent.

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