10 Best Catalytic Converter Anti Theft Device of 2025

Tested and Reviewed: Top 10 Catalytic Converter Anti Theft Device deals with expert ratings from 8.1 to a perfect 10

July 2025 Edition

Editor's Choice

9.7

Save 14%

MILLERCAT

Anti-Theft Cat Shield, Fits 2014-2019 Toyota Corolla - Miller CAT Stainless Steel Catalytic Converter Protection

14% Off

Editor's bottom line:

“This catalytic converter anti theft device is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

OEM Authorized Accessory Product
Compatible with the 2014-2019 Toyota Corolla 1.8L with OEM converters. Not compatible with "LE Eco" Trims (Valvematic) or "iM" models.
Our catalytic shield is completely drill-less and is secured with tamper-proof screws, which allow the shield to be removed when needed but help keep it secure from thieves.
Required Tools - 10mm socket, 14mm wrench, bit driver, ratchet with extension
We may charge a restocking fee up to $50. We recommend hiring a professional to install your Cat Shield. Please check specs and vehicle compatibility info prior to purchase and reach out with any questions about fitment. Cat Shield may have surface imperfections.

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Picked by 193 people today

Best Value

9.5

Save 39%

Pop & Lock

POP & Lock – CAT Rap Catalytic Converter Security – Universal Catalytic Converter - Universal Design - Anti Theft Catalytic Converter Protection Shield (PL9800)

39% Off

Main Highlights

UNIVERSAL FIT: The Pop & Lock CAT RAP Catalytic Converter is compatible with many vehicle platforms, with an easy 30-minute installation, regardless of the catalytic converters orientation. This shield will protect your converter, making thieves think twice about the time and effort to remove it.
FEATURES & BENEFITS: With its unique design, it creates individual security loops through each channel of the security plate making it difficult to remove. By optimized cable length, this provides flexibility for wrapping techniques while installing, featuring a new bolt-holding adapter plate and installation bit, and no drilling or welding needed.
TRUSTED SECURITY: Pop & Lock provides the aftermarket price on truck and vehicle accessories with reliable products for your automotive and truck adventures. This catalytic converter shield has all stainless-steel components that resist corrosion, despite the harshest of vehicle environments.
MANUFACTURER RECOMMENDED: It should take about 20 min per CAT-RAP to install properly. It would be easier to access the underbody if the vehicle is lifted or on ramps. If utilizing ramps, please be sure to utilize wheel chocks for safety purposes. See installation instructions.
FOR BEST RESULTS: Pop & Lock is made in the USA and are the industry leaders in aftermarket tailgate locks and accessories solutions for vehicles looking for additional security. For best results, customers have also purchased additional accessories and the Gate Defender for added security.

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9.5

MZS

MZS Catalytic Converter Protection Shield, Anti-Theft Cat Protector Compatible with 2016-2022 Prius Gen 4

Free Shipping

Main Highlights

Unique Material : Made of 6061-T6 aluminum material which is lighter but hard. Heavy duty, corrosion-resistant and durable.
Anti-theft : Once rivet screws are placed in, thieves are hard to take it off and stole your catalytic converter in minutes.
DIY Project : Punched louver vents allow for proper ventilation. DIY broadens the heat extraction holes and provide more efficient cooling.
Easy Installation : No welding or cutting required. Installed with rivet screws in 1/2-1 hours.
MZS catalytic converter protection shield is a sturdy plate. It protects your catalytic converter from being stolen.

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9.2

FOMIUZY

FOMIUZY Universal Catalytic Converter Security Protector Cat Clamp Shield Stainless Steel Plate Cat Strap Cover Cat Rap Device For Anti Theft Replace PL9800

Free Shipping

Main Highlights

Direct Replacement: If your vehicle is often parked in less secure places, the catalytic converter is located in an easily accessible and removable location where a thief can cut the cat from the car in about two minutes, it is recommended to purchase this product to protect the cat from theft. This shield fits securely under the catalytic converter for added safety. This shield meets or exceeds OEM standards and is factory tested, perfectly matched to the original car and ready to install.
High Quality: Made of reinforced aluminum material, it is corrosion-resistant, impact-resistant, not easy to rust, and has a long service life. Able to bind under your catalytic converter capable of effectively covering the area where thieves cut off the car's catalytic converter, the Stainless steel can embed into the cut-off wheel, causing it to eventually explode, or passivate the saw blade quickly and badly, turning the theft away, very deterrent, giving you Long-term stability and excellent performance
Fits For: Universal fit, but the kit only protects one catalytic converter, and if you need to protect more, you can buy two or three or four packs for more protection.
OE#: PL9800
Buy With Confidence: Our catalytic converter shield has a lifetime warranty. If the part fails or breaks, please contact us for replacement. Save hundreds of dollars off of dealer prices by purchasing this part and taking advantage of our warranty.Price concessions and guaranteed, no need to worry about quality problems

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9.0

Save 12%

1409KMT

Catalytic Converter Protector Shield Defender Aluminum Replacement for Prius 2010 2011 2012 2013 2014 2015 - Catalytic Converter Anti Theft

12% OffFree Shipping

Main Highlights

Prius Catalytic Converter Shield Fits:2010-2015 Prius .
Catalytic converter protector - provides a strong barrier against catalytic converter theft.
Utilizes the factory mounting points and adds in security hardware.
Made from high quality aluminum and exquisiteworkmanship. Corrosion-resistant,No welding required.
Please contact us for install instruction , Should you have any other question please feel free to contact us .

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8.8

RULLINE

RULLINE Universal Security Anti Theft Catalytic Converter Protection Shield Catalytic Converter Catalytic Converter Anti Theft Shield Cover Compatible with Dodge Chevrolet etc.

Free Shipping

Main Highlights

Universal Compatibility:Compatible with various vehicle platforms, this catalytic converter is easy to install within 30 minutes, irrespective of the converter's orientation. Its robust shield deters theft by adding a layer of protection to your converter.
Innovative Design Features:Featuring a unique design, the shield creates individual security loops throughout each channel of the security plate, making removal difficult. The optimized cable length allows for flexible wrapping techniques during installation, eliminating the need for drilling or welding.
Reliable Security Measures:Trusted for providing aftermarket solutions for automotive and truck adventures, this catalytic converter shield is constructed with all stainless-steel components that resist corrosion, ensuring durability in even the harshest vehicle environments.
Manufacturer's Installation Recommendation:The manufacturer suggests a 20-minute installation time per vehicle. For easier access to the underbody, lifting the vehicle or using ramps is recommended. When using ramps, be sure to utilize wheel chocks to enhance safety.
Exceptional Customer Care: We prioritize your satisfaction. Should you have any questions or concerns during use, please do not hesitate to reach out to us for swift assistance.

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8.6

Generic

Guardian Catalytic Converter Alarm PRO | Protected in Automotive Shielding with Magnet Mount

Free Shipping

Main Highlights

New Guardian Catalytic Converter Alarm PRO with easy magnetic install!
The only catalytic converter alarm with an industrial strength shielding to protect the unit from the intense temperatures and harsh environment found under your vehicle.
EVERY ORDER SHIPS WITH A CUSTOMER SERVICE PHONE NUMBER TO A REAL PERSON, AS WELL AS EMAIL ADDRESS. WERE HERE TO GUIDE YOU THROUGH YOUR INSTALLATION AND HELP WITH ANY NEEDED TROUBLESHOOTING.
Manufactured in Charleston South Carolina by people like you who want to change the criminal environment we live in.
Easily installed in minutes with detailed instructions on how and where to install. Firmly affixes to the vehicle with powerful magnet and closely monitors vibrations on the exhaust system.
Each alarm comes with "Protected by Guardian Undercarriage Alarm" sticker to let thieves know you are not an easy target for catalytic converter theft.
Activated with a keychain remote, alarm monitors vibration on your exhaust to ward off catalytic converter thieves.

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8.3

wsdcam

WSDCAM Catalytic Converter Alarm 113dB Loud Wireless Catalytic Converter Anti Theft Vibration Vehicle Security Alarm System Motorcycle Car Alarm with Remote Aluminum Alloy

Free Shipping

Main Highlights

This anti-theft alarm triggered by vibration. Attached the alarm under the car on the connecting pipe or tailpipe with included stainless steel straps and heat guard tapes, if thieves attempt to remove the catalytic converter the anti-theft alarm will be activated and make 113dB loud alarm
EASY INSTALLATION - Heat-resistant boxes made of aluminum have better heat resistance and can withstand radiant heat up to 3000. Easy do it yourself installation, need a jack to lift your car
ADJUSTABLE VOLUME - 3 levels adjustable volume, up to 113dB LOUD alarm, scare off potential thieves effectively and give you good peace of mind. Well-made catalytic converter alarm with great performance
ADJUSTBALE SENSITIVITY - 7 levels adjustable sensitivity from low to high, easy to set it as your need. The factory default is the highest level and we suggest set it at the highest sensitivity level
REMOTE CONTROL - Wireless control by remote, strong wireless range up to 66ft. Vehicle search function, easy to find your vehicles in parking lot, 3 kinds of bells for your choice. IP55 waterproof, suitable for outdoor use

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8.1

wsdcam

WSDCAM 113dB Bike Alarm Catalytic Converter Alarm Wireless Anti Theft Vibration Motion Sensor Vehicle Security Alarm System Waterproof Motorcycle Alarm Bicycle Alarm with Remote (NO Heat Resistance)

Free Shipping

Main Highlights

[LOUD ALARM & ADJUSTABLE VOLUME] Up to 113dB LOUD alarm, scare off potential thieves effectively. Well-made alarm with great performance. 3-lever adjustable volume, dont worry about whether the alarm is extremely loud or not loud enough
[ADJUSTABLE SENSITIVITY & WATERPROOF] 7 level adjustable sensitivity from gentle touch to push or beat, easy to set according to your needs. IP55 waterproof, suitable for outdoor use
[REMOTE CONTROL] Wireless control by remote, strong wireless range up to 66ft. Vehicle search function, easy to find your vehicles in parking lot, 3 kinds of bells for your choice
[EASY TO INSTALL & USE] Super easy installation by pasting with double-sided sticker or tying it with strap
[MULTI-PURPOSE ALARM] Vibration triggered alarm suitable for Bikes, Electric Bike, Motorcycles, Scooter, Car, Trailer, Luggage, Doors and Windows, Catalytic Converter...

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8.1

HIPOPY

Car Solar Power Simulated Dummy Alarm, Anti-Theft LED Flashing Security Light Fake Lamp, Automotive Warning Interior Safety Lights with USB Charger Port, Car Accessories for Most Cars (Blue/1PCS)

Free Shipping

Main Highlights

Eco-Friendly Solar Power: The car false alarm light is powered by the latest upgraded solar energy, which can be absorbed and saved in the battery. It can flicker all night long after enough sunlight shines during the day. Note: This LED will blink at night, not during the day. (If you want it to blink during the day, you can cover the other end with dark paper).
With USB Charging Port: This analog alarm light not only can be charged automatically with solar energy, but also has a USB charging port. When there is not enough light on rainy days, you can use the USB to charge. The LED will strobe slightly when charging, and stop strobing when fully charged.
Anti-Theft: This car simulator alarm light can scare off those with bad intentions and protect your property from potential thieves at night. Built-in light sensor, the microcomputer controller will automatically sense the intensity of light. There is a setting switch on the back, when you don't want it to blink you can turn the switch to OFF, when you want it to start working you can turn the switch to ON.
Strong Adhesive on The Bottom: It comes with strong double-sided tape on the bottom, so you can simply stick it anywhere you want to mount it. Note: Please make sure the surface is dry and clean before sticking, try not to stick on dirty or rough surface.
Package Includes: Included in the package is a dummy alarm light measuring 1.96 x 0.98 inches. We offer two specifications for you to choose from, red light and blue light. If you have any questions, please feel free to contact us, we will reply as soon as possible.

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Our Best Overall Choice

Best Choice

9.7

MILLERCAT

Anti-Theft Cat Shield, Fits 2014-2019 Toyota Corolla - Miller CAT Stainless Steel Catalytic Converter Protection

14% Off

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

OEM Authorized Accessory Product
Compatible with the 2014-2019 Toyota Corolla 1.8L with OEM converters. Not compatible with "LE Eco" Trims (Valvematic) or "iM" models.
Our catalytic shield is completely drill-less and is secured with tamper-proof screws, which allow the shield to be removed when needed but help keep it secure from thieves.
Required Tools - 10mm socket, 14mm wrench, bit driver, ratchet with extension
We may charge a restocking fee up to $50. We recommend hiring a professional to install your Cat Shield. Please check specs and vehicle compatibility info prior to purchase and reach out with any questions about fitment. Cat Shield may have surface imperfections.

Show Price

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