Locking Gas Cap W/2 Keys
4.1Editor score
Replaces OEM part numbers
High performance sealing
Includes two keys
In this guide
A locking gas cap with keys is an essential accessory for vehicle owners concerned about fuel theft and vapor emissions. It provides a secure seal that prevents unauthorized access to your fuel tank while maintaining the integrity of your emissions system.
We compared ten highly rated locking fuel caps based on compatibility, build quality, sealing performance, and ease of installation. Our analysis focuses on models that fit a wide range of vehicles while offering reliable anti-theft protection for daily drivers and classic cars alike.
Each pick in this list highlights specific vehicle fits and key features to help you choose the right cap for your needs. Please note that product availability and pricing can change quickly, so always verify compatibility with your vehicle before purchasing online.
Top 3 Picks for Best Locking Gas Cap with Keys
GM Genuine Parts GT264
4.4Editor score
Genuine GM replacement
Tight seal engineered
Deter fuel theft
United Pacific S1301
3.9Editor score
All metal construction
Triple chrome plated
Fits classic trucks
Top 10 Best Locking Gas Cap with Keys in 2026 Compared
The following comparison table lists all ten products side by side with their key specifications and compatibility notes to help you quickly identify the best fit for your specific vehicle model.
ProductsSpecificationsEditor scorePrice
Best Budget
Locking Gas Cap W/2 Keys
Replaces 10504 part
Fits Toyota and Scion
Gasoline resistant material
High performance sealing
4.1Editor score
Editor's Choice
Locking Gas Cap Fuel Tank with Key
ABS plastic and rubber
Strong sealing performance
Fits many brands
Easy to install
3.5Editor score
Best Premium
United Pacific S1301
All metal cap
Triple chrome finish
Fits 1947-71 Chevy
Includes two keys
3.9Editor score
Locking Gas Cap Fuel Tank with 2 Key
Anti-theft fuel security
Superior sealing performance
Direct replacement part
Wide application fit
3.1Editor score
Car Locking Gas Cap
High quality ABS plastic
Anti theft design
Sealed protective barrier
OEM replacement accessory
3.1Editor score
GM Genuine Parts GT264
GM OE specification
Quarter turn fuel cap
Deter fuel theft
Manufactured to quality
4.4Editor score
Gates 31828
Fuel resistant rubber
Heavy-duty construction
1/4 in turn
Includes two keys
4.2Editor score
Keyed Alike Locking Fuel Cap
Durable materials
Prevents vandalism
Independently tested
Long life design
4.3Editor score
Gates 31670
Fuel resistant rubber
Heavy-duty construction
1/4 in turn
Regular locking cap
4.0Editor score
Locking Gas Cap Fit for Jeep
Replace part number
Fits Jeep models
Fits Dodge models
Fits Ram trucks
4.4Editor score
1. Locking Gas Cap W/2 Keys – Best Budget Option
Locking Gas Cap W/2 Keys
Replaces OEM part numbers
High performance sealing
Includes two keys
Compatible with Toyota
This locking gas cap with keys is designed as a direct replacement for specific Toyota and Scion models. It ranks high for budget-conscious buyers who need reliable fuel security without paying premium prices for OEM parts. The product comes with two keys to prevent lockouts if one is lost.
Pros
- Affordable price point
- Wide vehicle compatibility
- Chemical resistant material
- Direct installation process
Cons
- Basic plastic construction
- Limited aesthetic options
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The cap features high performance sealing that meets or exceeds original equipment standards. It uses gasoline and chemical resistant materials to ensure a long service life under daily driving conditions. The design focuses on practicality and function rather than decorative elements.
While the materials are standard plastic, they provide sufficient durability for most drivers. Some users might prefer a metal cap for classic vehicles, but this model excels in everyday utility. The compatibility list is extensive, covering many popular models from the late nineties to recent years.
If you drive a compatible Toyota or Scion and want an affordable anti-theft solution, this cap is an excellent choice. It simplifies the replacement process and ensures your fuel tank remains secure. Always confirm your specific part number before ordering to guarantee a perfect fit.
Wide Vehicle Compatibility
This cap fits many Toyota models including 4Runner, Camry, Corolla, RAV4, and more from various model years.
Secure Fuel Protection
The locking mechanism prevents unauthorized access, helping you save fuel and reduce vapor emissions effectively.
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2. Locking Gas Cap Fuel Tank with Key – Best Value
Locking Gas Cap Fuel Tank with Key
Strong sealing design
OEM part replacement
Easy to install
Fits many brands
This locking fuel tank cap is a versatile choice for owners of Toyota, Chevy, and other major brands. It addresses the growing concern of fuel theft by providing a secure locking mechanism that requires a key to open. The cap includes two keys for convenience and peace of mind.
Pros
- Protects personal property
- Strong sealing performance
- Fits diverse brands
- Installation is simple
Cons
- Lower rating average
- Not for diesel
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The construction uses high-quality ABS plastic and rubber to ensure sturdiness and durability. It is designed to be anti-corrosion and waterproof, which helps prevent fuel penetration and maintains a tight seal. This design helps save fuel and reduce harmful vapor emissions during operation.
Installation is straightforward as you simply twist the cap until you hear a click. However, users should note that this cap is not suitable for diesel vehicles. The compatibility list is broad, but checking your specific part number is essential before purchase.
For drivers seeking an affordable and functional upgrade to their fuel cap, this model offers good value. It effectively deters theft and maintains emissions compliance for many vehicles. Just ensure your vehicle is listed in the compatible models to avoid return issues.
Anti-Corrosion Design
The durable rubber and plastic materials resist corrosion and water damage for longer service life.
Broad Brand Support
This cap supports brands like Toyota, Chevy, Nissan, GMC, Honda, Subaru, and more for versatile use.
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3. United Pacific S1301 – Best Premium for Classics
United Pacific S1301
All metal cap
Triple chrome plated
Fits classic trucks
Includes two keys
The United Pacific S1301 is a premium option designed specifically for classic Chevy and Ford vehicles from the late forties to early seventies. It features an all metal design with a triple chrome plated process that provides a high shine and durable finish. This cap appeals to enthusiasts who prioritize aesthetics along with security.
Pros
- All metal construction
- High shine chrome finish
- Vintage vehicle fit
- Durable design
Cons
- Higher price point
- Limited vintage fitment
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It comes with two keys included in the order to ensure you never get locked out of your fuel tank. The metal construction offers superior durability compared to plastic alternatives, making it a long-lasting choice for show cars or daily driven classics. United Pacific is known for their quality aftermarket parts.
While this cap is a premium choice, it may not fit modern vehicles. The fitment is specific to certain trucks and cars from a specific era. Buyers should verify their vehicle model year and type carefully before ordering to ensure compatibility with this vintage-focused design.
If you own a classic truck or car and want to maintain its authentic look while adding security, this cap is ideal. The triple chrome finish enhances the vehicle appearance while the locking mechanism protects against theft. It is a specialized solution for vintage vehicle owners.
Vintage Aesthetic
The triple chrome plated process gives the cap a high shine that matches classic vehicle styling perfectly.
Metal Durability
All metal construction ensures the cap resists wear and tear better than plastic caps on older vehicles.
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4. Locking Gas Cap Fuel Tank with 2 Key – Best Universal Fit
Locking Gas Cap Fuel Tank with 2 Key
Anti-theft fuel security
Superior sealing performance
Direct replacement part
Wide application fit
This locking fuel tank cap offers anti-theft fuel security through a mechanical lock design. It is built to replace genuine parts like 10504, 31780, and 77300-47020, ensuring direct compatibility with many car models. The cap uses high-quality ABS plastic and rubber for superior sealing and durability.
Pros
- Mechanical lock design
- Flame-retardant material
- Direct replacement for OEM
- Wide application fit
Cons
- Lower rating score
- Verify part numbers
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The material selection includes flame-retardant and impact-resistant properties to handle varying temperatures. It ensures a tight fit to prevent fuel evaporation and leakage, helping save fuel and reduce harmful emissions. The installation is easy as you simply rotate the cap until it clicks.
Users report this as a universal fuel tank cap lock that fits many models. However, the rating is lower than some competitors, suggesting some variability in fit or finish. It remains a solid option for those seeking a budget-friendly replacement for worn OEM caps.
For drivers needing a direct replacement with locking security, this cap offers broad compatibility. It addresses fuel theft risks while maintaining emissions standards. Always check the detailed product details page for the most current list of applicable vehicle models.
Flame Retardant Material
The ABS plastic construction includes flame-retardant properties for added safety in the fuel tank area.
Direct OEM Replacement
Designed to directly replace genuine parts for perfect compatibility without modification or adapters.
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5. Car Locking Gas Cap – Best for Specific Fits
Car Locking Gas Cap
High quality ABS plastic
Anti theft design
Sealed protective barrier
OEM replacement accessory
This heavy-duty vehicle lock fuel cap is designed for specific models like the Miata, Civic, and other Honda or Pontiac variants. It uses high-quality ABS plastic material that maintains a stable structural shape and resists scratches during daily use. The cap includes a built-in professional lock system paired with a dedicated key.
Pros
- High quality materials
- Stable structural shape
- Built-in professional lock
- Included two keys
Cons
- Limited vehicle models
- Verify specific fit
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The sealed design creates a reliable protective barrier to prevent fuel vapor leakage and block impurities like dust and water. This protects the fuel system from failures caused by contaminants. The anti-theft feature reduces the risk of fuel theft and provides peace of mind.
Installation is easy with no special tools required. You simply align the new cap with the fuel tank opening and tighten it clockwise. The two included keys eliminate inconvenience if one is lost or left inside the vehicle. It is a practical replacement for damaged OEM caps.
If you own one of the compatible vehicles listed, this cap offers good protection and durability. It focuses on function and stability with a solid locking mechanism. Always verify the scope of application against your vehicle year and model before ordering.
Impurity Protection
The sealed design effectively blocks water and dust from entering the fuel tank to avoid system failures.
Structural Stability
High quality ABS material maintains a stable shape over time without warping or scratching easily.
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6. GM Genuine Parts GT264 – Best OEM Fit
GM Genuine Parts GT264
GM OE specification
Quarter turn fuel cap
Deter fuel theft
Manufactured to quality
This GM Genuine Parts locking quarter turn fuel tank cap is engineered to provide a tight seal and deter fuel theft. It is a GM-recommended replacement part for GM vehicles' original factory component, ensuring perfect fit and function. The product offers the quality and reliability expected from GM OE.
Pros
- Genuine GM replacement
- Engineered tight seal
- GM recommended part
- Durable construction
Cons
- Higher price than aftermarket
- GM vehicles only
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Manufactured to GM OE specifications, this cap meets or exceeds strict quality requirements for fit, form, and function. The locking mechanism adds security while maintaining the emissions control systems required by regulations. It comes with two keys to ensure easy access.
For GM owners, using a genuine part ensures you do not compromise your vehicle's warranty or fuel system performance. While aftermarket options exist, the genuine cap guarantees compatibility with the specific quarter turn mechanism used by GM models. The higher price reflects the guaranteed quality.
If you drive a GM vehicle, this cap is the safest choice for replacement. It provides the exact engineering standards of the original factory part while adding security features. Always verify your specific vehicle model compatibility with the part number before purchasing.
GM OE Standards
Manufactured to exact GM original equipment specifications for guaranteed fit and performance reliability.
Quarter Turn Lock
The quarter turn mechanism is designed specifically for GM vehicles ensuring smooth locking operation.
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7. Gates 31828 – Best Heavy Duty
Gates 31828
Fuel resistant rubber
Heavy-duty construction
1/4 in turn
Includes two keys
The Gates 31828 locking fuel tank cap is a rugged option designed for heavy-duty applications. Its seals are compounded from fuel-resistant rubber to ensure longevity and prevent leaks. The locking mechanism deters fuel theft and vandalism, offering peace of mind for commercial or personal use.
Pros
- Fuel resistant seals
- Rugged construction
- Deters vandalism
- Standard quick-on fit
Cons
- Older design style
- Verify thread type
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It comes with two keys and the lock opens with a 1/4 inch turn of the key for easy access. The construction is heavy-duty to withstand frequent use. It is designed as a regular locking fuel cap with standard quick-on dimensions that fit many vehicle fuel tanks.
Gates is a trusted brand for automotive parts, so this cap reflects their reputation for durability. It is a solid choice for those who need a reliable seal that resists fuel corrosion. Always check your fuel cap thread size to match the regular quick-on specifications.
For drivers seeking a rugged, proven locking cap from a reputable brand, this model is excellent. It combines heavy-duty construction with effective anti-theft features. Verify the cap size and thread style before purchase to ensure it matches your vehicle's existing setup.
Fuel Resistant Seals
The seals are compounded specifically to resist fuel corrosion and maintain a tight seal over time.
Heavy Duty Build
Rugged and heavy-duty construction ensures the cap withstands daily wear and environmental conditions.
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8. Keyed Alike Locking Fuel Cap – Best Fleet Solution
Keyed Alike Locking Fuel Cap
Durable materials
Prevents vandalism
Independently tested
Long life design
This Keyed Alike Locking Fuel Cap is designed to protect your fuel from theft and vandalism. It is manufactured from durable materials that ensure a long life under regular use. The cap has been independently tested for emission control to meet industry standards.
Pros
- Protects from theft
- Long-life materials
- Independently tested
- Simple design
Cons
- Basic model details
- Check compatibility
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The product focuses on essential security features without unnecessary complexity. Its durability makes it a practical choice for daily drivers or fleets needing reliable protection. The long-life materials help reduce replacement costs over time.
While detailed specifications are minimal, the independent testing for emission control suggests reliability. It is a straightforward solution for those needing a basic locking cap. Always check the compatibility to ensure it fits your vehicle's specific thread and size requirements.
If you need a reliable, long-lasting locking cap with emission control testing, this model is a strong candidate. It simplifies fuel security with a focus on durability and basic protection. Confirm your vehicle compatibility before ordering to avoid fit issues.
Independent Testing
The cap has been independently tested for emission control to meet industry regulatory standards.
Long Life Design
Manufactured from durable materials that provide a long service life and reduce replacement needs.
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9. Gates 31670 – Best Value Alternative
Gates 31670
Fuel resistant rubber
Heavy-duty construction
1/4 in turn
Regular locking cap
The Gates 31670 locking fuel tank cap offers a regular locking fuel cap with deep cam specifications. Its seals are compounded from fuel-resistant rubber to ensure a tight seal. The locking mechanism deters fuel theft and vandalism, and it comes with two keys for convenience.
Pros
- Fuel resistant seals
- Deters fuel theft
- Includes two keys
- Regular locking fit
Cons
- Standard design
- Verify thread type
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It is a rugged and heavy-duty construction that withstands frequent use. The lock opens with a 1/4 inch turn of the key for easy access. This model is a reliable alternative for those needing a standard cap with locking capabilities.
Similar to other Gates products, it focuses on durability and functional anti-theft features. It is a good choice for everyday vehicles requiring a secure seal. Always check the specific dimensions like the 1 3/8 inch x 1 7/8 inch deep cam to ensure fit.
For drivers needing a reliable, heavy-duty locking cap at a reasonable price, this Gates model is suitable. It balances security with standard functionality. Verify your vehicle's fuel tank thread and size before purchase to guarantee proper installation.
Deep Cam Fit
The deep cam design ensures a secure fit on fuel tanks requiring this specific cap style.
Rubber Seals
Fuel-resistant rubber seals maintain the integrity of the cap even with exposure to gasoline.
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10. Locking Gas Cap Fit for Jeep – Best for Jeep Owners
Locking Gas Cap Fit for Jeep
Replace part number
Fits Jeep models
Fits Dodge models
Fits Ram trucks
This locking gas cap is designed specifically for a wide range of Jeep, Dodge, Chrysler, and Ram vehicles. It replaces part numbers like 05278655AB and 5278655AB. The cap fits popular models like Wrangler, Grand Cherokee, and Ram trucks, offering secure locking protection.
Pros
- Wide Mopar compatibility
- Low price point
- Secure locking design
- Easy replacement
Cons
- Verify part number
- Mopar models only
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The product is affordable and provides a reliable seal for fuel tanks. It is a direct replacement for worn or missing caps, ensuring your vehicle remains compliant with emissions standards while deterring theft. The extensive compatibility list makes it a versatile choice for Mopar owners.
Installation is straightforward as it is a direct replacement for original parts. However, verify the part number on your current cap to ensure it matches the replacement. This prevents fit issues and ensures the locking mechanism functions correctly with your tank.
If you own a Jeep, Dodge, or Ram vehicle, this cap offers a budget-friendly security solution. It is designed to fit common models across many years. Always cross-reference your specific vehicle model and part number before ordering to confirm compatibility.
Mopar Compatibility
This cap fits a wide range of Jeep Dodge Chrysler and Ram models for versatile use.
Secure Locking Design
The locking mechanism helps prevent unauthorized access to your fuel tank and deters theft.
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Buying Guide – How to Choose the Best Locking Gas Cap with Keys
Selecting the right locking gas cap with keys requires understanding your vehicle's compatibility and your security needs.
Vehicle Compatibility
Always check the part number on your current cap to ensure the replacement fits your specific vehicle model. Most caps list compatible brands and model years clearly.
Verify your vehicle fit using the manufacturer's compatibility charts before purchasing.
Material Quality
Plastic caps are affordable and lightweight but may not last as long as metal caps under extreme conditions. Metal caps offer superior durability and aesthetic appeal for classic vehicles.
Choose high-quality ABS plastic or metal based on your durability needs.
Sealing Performance
A good cap must maintain a tight seal to prevent fuel evaporation and vapor emissions. Look for caps with fuel-resistant rubber seals.
Ensure the cap meets or exceeds emissions standards to avoid check engine lights.
Security Mechanism
Ensure the cap has a reliable locking mechanism that prevents unauthorized access. Some caps use keys while others use codes.
Check if the cap comes with two keys to avoid lockouts if one is lost.
Ease of Installation
Most locking caps are designed for easy installation without tools. Look for caps that require a quarter turn to secure.
Verify the cap is a direct replacement for your original part to avoid adapters.
Price vs. Quality
Budget options are available but ensure they meet safety and emissions standards. Premium options may offer better durability or specific fits.
Balance your budget with the required quality and fit for your vehicle.
Emission Compliance
Using a non-compliant cap can trigger emissions warnings on your dashboard. Always choose caps that are independently tested for emission control.
Confirm the cap complies with EPA requirements for your region before purchase.
How to Use and Care for Your Locking Gas Cap with Keys
Remove your old cap by twisting it counterclockwise and clean any dirt from the fuel tank opening to ensure a good seal.
Install the new cap by aligning it with the tank opening and twisting it clockwise until you hear a click for a secure fit.
Regularly inspect the seals for wear and keep the key hole clean to prevent lock jamming due to debris or rust.
Frequently Asked Questions
Do locking gas caps affect fuel economy?
No, a locking gas cap with keys does not negatively affect fuel economy if it seals properly. It actually helps maintain pressure in the fuel tank and prevents fuel evaporation which can improve efficiency.
Will a locking gas cap trigger a check engine light?
If the cap seals properly and is designed for your vehicle it will not trigger a check engine light. Ensure the cap is compatible with your emissions system to avoid any warning indicators.
How do I know which key fits my cap?
Most locking gas caps come with two keys that work with the same lock mechanism. Some models may have a specific key code so always check your product details for key information.
Can I replace a locking cap with a non-locking one?
Yes you can replace a locking cap with a non-locking one but you lose the security against fuel theft. Ensure the replacement cap still meets your vehicle's emission and sealing standards.
Are locking gas caps universal?
Most locking gas caps are not universal and fit specific vehicle models. Check the compatibility list carefully to ensure the cap matches your fuel tank thread and size.
How long do locking gas caps last?
The lifespan depends on material and quality but high-quality caps can last several years. Plastic caps may wear out faster than metal ones under heavy use.
Final Thoughts on Choosing the Best Locking Gas Cap with Keys
We reviewed ten top-rated locking gas caps with keys to help you secure your vehicle's fuel tank against theft. Our top picks include the GM Genuine Parts GT264 for OEM reliability and the United Pacific S1301 for classic car enthusiasts.
When choosing a cap prioritize compatibility with your specific vehicle model and ensure it meets emissions standards. A good cap protects your fuel and saves money by preventing vapor loss.
Always verify the part number and current pricing before buying as these details can change quickly. We hope this guide helps you make an informed decision for your vehicle's fuel security.