Hearing a deafening roar from your vehicle’s exhaust is usually the first sign that your catalytic converter is missing in action says Oscar Collins.
While the situation is frustrating, the steps you take immediately afterward can influence the repair costs, insurance claims and how quickly you get back on the road.
Here’s what to do next.
1. Avoid Driving Your Vehicle
The moment you realize your catalytic converter has been stolen, don’t fire up the engine and hope for the best. Yes, the car may still technically run, but driving it in that condition can create more problems.
Catalytic converters reduce harmful emissions by converting nitrogen oxides, hydrocarbons and carbon monoxide into less harmful gases, such as water vapor and carbon dioxide. Without one, your vehicle releases significantly higher levels of pollutants into the air. Additionally, that missing converter can leave behind cut exhaust pipes, exposed wiring and damaged oxygen sensors. In some cases, the increased exhaust temperature may also damage other components underneath your vehicle.
If possible, leave the vehicle parked and arrange for it to be towed to a repair shop or inspected on-site by a mechanic.
2. Document the Scene and File a Police Report
Before you move or repair your car, take a few minutes to document everything. Catalytic converter thefts are still a common occurrence, with incidents increasing by 1,215% between 2019 and 2022. That means insurance companies and police departments are seeing these cases regularly, but detailed documentation remains important.
Take clear photos from several angles and note important details about the theft. Helpful things to document include:
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The cut exhaust pipes underneath the vehicle
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Nearby debris or tools left behind, if any
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The date, time and location
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Security cameras or possible witnesses nearby
Then, file a police report. Even though stolen catalytic converters are difficult to trace once removed because they don’t have identification numbers, reports still help authorities identify theft patterns tied to certain neighborhoods or vehicle types. If the theft occurred in a parking garage, apartment complex or commercial lot, notify property management as well.
3. Contact Your Insurance Provider
Once you’ve documented the theft and filed a police report, contact your insurance provider as soon as possible. Since a catalytic converter theft is considered a non-collision event, it’s usually covered under comprehensive coverage. Your insurer will likely ask for the photos and police report you already gathered.
Catalytic converter replacement can be expensive. The converter alone can cost anywhere from $300 to $2,500, depending on the make and model. Your coverage may help pay for the replacement catalytic converter itself, the labor needed to install it and repairs for other damage caused during the theft.
4. Work with a Trusted Mechanic
Catalytic converter thieves usually work fast, not carefully. Although the missing converter is usually obvious, the damage left behind may not be. That’s why your next move should be getting the vehicle inspected by a qualified mechanic. A proper inspection should include the oxygen sensors, exhaust piping, mounting brackets, heat shields and nearby wiring.
After your mechanic confirms the damage, you’ll usually need to choose between original equipment manufacturer (OEM), aftermarket or used replacement catalytic converters. OEM converters come directly from the manufacturer. They typically offer the best fit and reliability, but they’re also the most expensive. Aftermarket converters are generally cheaper and easier to find, though quality can vary significantly.
If you want to reduce costs further, used or refurbished converters can be an option. However, local laws may limit their use. States such as California and Colorado require CARB-certified converters with specific Executive Order numbers. Therefore, always double-check what’s legally permitted before approving repairs.
It’s best not to attempt installing the replacement yourself. A skilled mechanic can ensure leak-free installation so your vehicle passes strict emissions tests.
5. Invest in Prevention to Make Your Car Harder to Target
Unfortunately, many owners become repeat targets of catalytic converter theft if it seems like an easy job. Some vehicles are popular with thieves as well, such as the Ford F-Series, Honda Accord, Toyota Prius, Honda CR-V and Ford Explorer. Hybrid vehicles are particularly attractive because metal recyclers may pay up to $800 for their catalytic converters, according to the National Insurance Crime Bureau.
No anti-theft solution is completely foolproof, but several deterrents can make your car much less appealing to thieves. Some options you can consider are catalytic converter shields, steel cable locking systems, protective cages, tilt-sensitive alarm systems and VIN etching on the converter.
In addition to installing anti-theft devices, improve your parking habits. Whenever possible, park in well-lit areas or inside garages. Vehicles with high ground clearance are easier targets because thieves can slide underneath quickly without needing a jack.
Exhausted, Not Defeated
Acting quickly can prevent the situation from spiraling into bigger repair bills and longer downtime. The sooner you document the theft, contact insurance and get the vehicle inspected, the sooner you can use your car again.
About the Author
Author Bio: Oscar Collins is the editor-in-chief of Modded. He has over five years of experience writing in the auto space, having published with Automotive News, Carwash and InAutomotive. Follow him on X @TModded for frequent updates on his work.
