Securing valuables in your car trunk is essential for peace of mind, especially when traveling or parking in unfamiliar areas. We researched, compared, and evaluated the top lock boxes for car trunks based on manufacturer specifications, published safety standards, and aggregated owner feedback. Our guide covers seven real products available on Amazon, each with distinct strengths and weaknesses to help you choose the right one for your needs.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Locker Down TRUNKSAFE Best Overall 16-gauge steel, key or combination lock, bolt-down installation |
9.0 | 🛒 Check Price |
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Vaultz Locking Security Trunk Box Best Portable Heavy-duty steel, combination lock, padded carrying handle |
8.7 | 🛒 Check Price |
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Barsun Trunk Safe Lock Box Best Budget Carbon steel, key lock, pre-drilled mounting holes |
8.1 | 🛒 Check Price |
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Stalwart Trunk Safe Compact Pick Alloy steel, combination lock, foam-lined interior |
7.8 | 🛒 Check Price |
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Amazon Basics Locking Steel Trunk Safe Solid Value Heavy-gauge steel, key lock, carpeted interior |
8.4 | 🛒 Check Price |
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SnapSafe Lock Box for Car Trunk High Security 12-gauge steel, dual locking lugs, pry-resistant lid |
9.2 | 🛒 Check Price |
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Mesa Safe Company Trunk Safe Premium Build 10-gauge steel, electronic lock, foam padding |
9.4 | 🛒 Check Price |
1. Locker Down TRUNKSAFE: Best Overall
In our evaluation, the Locker Down TRUNKSAFE stands out for its robust build and security. Made from 16-gauge steel with a durable powder coat, it resists cutting, prying, and tampering. The dual locking mechanism (key or combination) adds flexibility, and the bolt-down installation ensures the box cannot be easily removed. Based on owner feedback, it fits well in most sedan and SUV trunks, though some users noted that the combination dials can be stiff initially.
However, this model requires drilling for installation, which may not be ideal for leased vehicles or those who want a portable solution. If you prefer a non-permanent option or need to move the box between cars, consider a cable-secured lock box instead. Overall, the TRUNKSAFE is a top choice for those who prioritize maximum security and are willing to commit to a fixed installation.
- Heavy-duty 16-gauge steel construction with powder coat finish resists cutting and prying.
- Dual locking options: key lock or programmable combination lock for convenience.
- Bolt-down design secures to trunk floor, preventing theft of the box itself.
Pros: Extremely sturdy and difficult to break into.; Relatively easy to install with included hardware.; Compact design fits most trunks without taking much space.
Cons: Permanent installation may not suit renters or those who frequently change vehicles.
2. Vaultz Locking Security Trunk Box: Best Portable
The Vaultz Locking Security Trunk Box is a versatile portable option we found suitable for those who need to move their lock box frequently. It features a durable steel construction with a resettable combination lock and soft interior padding. Based on owner feedback, it is ideal for storing documents, electronics, and small valuables, and its compact size fits easily in most trunks. The carrying handle makes it convenient to take into hotels or offices.
However, because it is not anchored, a determined thief could grab the entire box. We recommend this for low-risk environments or as a deterrent rather than a high-security solution. If you need maximum security, consider a bolt-down model. The Vaultz is best for everyday use where portability and convenience are key.
- Portable design with a padded handle for easy transport.
- 3-digit resettable combination lock provides security without keys.
- Interior foam padding protects contents from scratches and bumps.
Pros: Lightweight and easy to carry between car, office, or home.; No installation required; simply place in trunk.; Good value for the price.
Cons: Steel walls are thinner than bolt-down models, offering less resistance to forced entry.
3. Barsun Trunk Safe Lock Box: Best Budget
For budget-conscious buyers, the Barsun Trunk Safe Lock Box offers a basic level of security at an entry-level price. It is made from carbon steel with a powder coat and comes with two keys. The box has pre-drilled holes for optional mounting, giving you flexibility. In our evaluation, it is adequate for storing items like registration papers, spare change, or small tools. Owner feedback indicates it works well for light-duty use.
However, the key lock is a potential weak point: keys can be lost, and the lock mechanism is not as robust as higher-end models. The steel gauge is thinner, so it may not withstand serious attacks. We recommend this only if your security needs are minimal and you want a very affordable option. For anything valuable, consider upgrading to a sturdier model.
- Affordable carbon steel construction with a powder-coated finish.
- Includes two keys and pre-drilled holes for optional bolt-down mounting.
- Compact size fits under seats or in small trunk spaces.
Pros: Very low price point for a lockable steel box.; Can be bolted down or used as a portable box.; Simple key lock is easy to use.
Cons: Key lock is less secure than combination locks; keys can be lost or duplicated.; Thinner steel may be vulnerable to prying.
4. Stalwart Trunk Safe: Compact Pick
The Stalwart Trunk Safe is designed for those who need a compact lock box for small valuables like wallets, phones, or jewelry. It features a combination lock and a foam-lined interior to prevent scratches. Based on owner feedback, it is easy to set the code and fits discreetly in most vehicles. We found it to be a decent option for low-security storage where space is at a premium.
However, the small size and thin alloy steel mean it is not suitable for larger items or high-value protection. A thief could easily carry it away if not secured. We suggest this only for temporary, low-risk situations or as a secondary lock box. For primary security, look for a larger, heavier model.
- Small footprint fits in tight trunk spaces or under seats.
- 3-digit combination lock with resettable code.
- Interior foam padding protects fragile items.
Pros: Very compact and lightweight.; Combination lock eliminates need for keys.; Foam lining adds protection for electronics.
Cons: Small size limits what you can store.; Not very resistant to forced entry due to thin metal.
5. Amazon Basics Locking Steel Trunk Safe: Solid Value
The Amazon Basics Locking Steel Trunk Safe offers a balance of affordability and decent security. It is made from heavy-gauge steel and features a key lock, carpeted interior, and pre-drilled mounting holes. In our evaluation, it provides good protection for everyday items like documents, electronics, or tools. Owner feedback highlights its solid feel and ease of installation.
However, the key lock is a potential drawback: keys can be lost or broken, and the lock cylinder may not be pick-resistant. Additionally, the box is not as heavy as premium models, so it could be carried away if not bolted down. We recommend this for users who want a reliable lock box without spending a lot, but who are willing to mount it for added security.
- Heavy-gauge steel body with a durable black finish.
- Includes two keys and a carpeted interior to reduce noise and scratches.
- Pre-drilled holes for optional floor mounting.
Pros: Solid build quality for the price.; Carpeted interior is a nice touch for protecting items.; Can be bolted down or used standalone.
Cons: Key lock may be less convenient than combination lock.; Some users reported the keys are easy to bend.
6. SnapSafe Lock Box for Car Trunk: High Security
For those who need the highest level of security, the SnapSafe Lock Box for Car Trunk is a top contender. Constructed from 12-gauge steel with dual locking lugs and a pry-resistant lid, it offers exceptional protection against theft. In our evaluation, it meets industry standards for security and is designed to withstand significant force. Owner feedback praises its robust build and peace of mind, especially for storing firearms or expensive gear.
However, its heavy weight and large size can be a drawback for smaller vehicles or those who want a portable box. It is also more expensive than other options. We recommend this only if you have high-value items to secure and can accommodate its size. For most users, a lighter, less expensive model may suffice.
- Extremely strong 12-gauge steel with a powder-coated finish.
- Dual locking lugs and a recessed lock shield prevent tampering.
- Includes heavy-duty mounting hardware and a foam liner.
Pros: Near-bank-vault level security for high-value items.; Pry-resistant design with reinforced lid.; Large interior volume fits laptops, tablets, and more.
Cons: Heavy and bulky, may not fit all trunks.; Higher price point than most competitors.
7. Mesa Safe Company Trunk Safe: Premium Build
The Mesa Safe Company Trunk Safe is the premium choice in our guide, offering the highest level of security and build quality. It features 10-gauge steel, an electronic lock with key override, and a foam-lined interior. Based on manufacturer specifications and owner feedback, it provides outstanding protection for valuables like firearms, jewelry, or important documents. The adjustable shelf adds versatility.
However, its high cost and heavy weight make it best suited for those with serious security needs and a permanent installation. The electronic lock, while convenient, relies on batteries and could malfunction. If you do not require this level of security, a simpler, more affordable model will serve you well. This is for users who want the best and are willing to pay for it.
- Thick 10-gauge steel body with a textured powder coat.
- Programmable electronic lock with key override for convenience.
- Interior foam padding and a removable shelf for organization.
Pros: Exceptional build quality and security.; Electronic lock is easy to use and reprogram.; Large capacity with adjustable interior.
Cons: Very expensive; overkill for casual users.; Electronic lock requires battery replacement and may fail over time.
Frequently Asked Questions
What size lock box should I get for my car trunk?
Measure your trunk space and consider what items you plan to store. Compact boxes (around 12x8x5 inches) fit most trunks and are good for small valuables. Larger boxes (up to 20x14x10 inches) can hold laptops, tablets, or multiple items but may not fit in smaller trunks. Always check the product dimensions against your vehicle.
Should I choose a key lock or combination lock?
Key locks are simple and reliable but you can lose the key. Combination locks eliminate the need for keys and are convenient if multiple people use the vehicle. However, combination locks can be forgotten or wear out over time. For high security, electronic locks offer keyless entry with backup keys.
Is it better to bolt the lock box down or use a cable?
Bolting the box to the trunk floor provides the best security because thieves cannot easily remove the entire box. Cable-secured boxes offer flexibility and portability but can be cut with bolt cutters. For permanent security, choose a bolt-down model. For occasional use, a cable lock may suffice.
Can I install a lock box in a leased car?
Yes, but check your lease agreement. Many bolt-down models require drilling holes, which may violate lease terms. Consider a portable lock box that does not require permanent installation, or use a cable-secured model that attaches to existing anchor points without drilling.
How do I maintain my trunk lock box?
Keep the lock mechanism clean and lubricated with graphite powder (not oil) to prevent sticking. Wipe the exterior with a damp cloth to remove dirt. For electronic locks, replace batteries annually or when the low-battery indicator appears. Regularly inspect mounting bolts for tightness.
Our Verdict
After researching and comparing the top lock boxes for car trunks, our top pick is the Locker Down TRUNKSAFE for its excellent balance of security, durability, and ease of installation. For those who prioritize portability, the Vaultz Locking Security Trunk Box is a strong runner-up. Choose based on your specific needs for security, portability, and budget.
