You turn the key and your car sounds like a race car, or a lawnmower. The check engine light comes on. You look underneath and see two cut ends of pipe where your catalytic converter used to be.
It's happening to a lot of Calgarians. According to Calgary police figures reported by Global News, 369 catalytic converter thefts had been reported in the city by late June 2026, compared with 147 in all of 2025. Thieves can saw one off in a few minutes, often in broad daylight.
Here's what to do in the first hour, what insurance covers, whether it's safe to drive and how to decide between replacing the converter and selling the car.
How to Know It's Been Stolen
- A loud roar or rumble when you start the car, getting louder as you accelerate
- A check engine light, often within a short drive
- Rattling or uneven idle
- Freshly cut pipe and bright metal under the middle of the car
- A strong exhaust smell, sometimes inside the cabin
What to Do First
- Take photos of the underside of the car and the cut pipes.
- Report the theft to Calgary police. For a theft that isn't in progress, use the non-emergency line at 403-266-1234 or report it online. Write down the file number, because your insurer will ask for it.
- Call your insurer or broker and ask whether you're covered.
- Arrange a tow to a repair shop rather than driving with a cut exhaust. See the safety section below.
- Check whether security cameras caught it, including your own, a neighbour's or the parking lot's.
Is It Safe to Drive Without a Catalytic Converter?
A stolen converter leaves a cut exhaust system. Have the car towed and inspected before driving it:
- Exhaust fumes. The exhaust now exits under the middle of the car instead of the back. Fumes, including carbon monoxide, can get into the cabin.
- Noise. A car this loud can draw attention from police, and exhaust noise can get you a ticket.
- Engine problems. Oxygen sensors and engine computers expect a converter. The engine may run poorly, and a sensor can be damaged when the thieves cut the pipe.
- Heat. Hot exhaust exits closer to the fuel lines and floor than it was designed to.
Cracking a window does not make a damaged exhaust safe. Avoid running the engine until a mechanic has assessed it, and never run a vehicle in a garage, even with the door open.
Does Insurance Cover a Stolen Catalytic Converter?
| Your coverage | What usually happens |
|---|---|
| Comprehensive or all perils | Theft of parts is usually covered, minus your deductible |
| Collision only | Usually not covered, because a theft isn't a collision |
| Liability only | Not covered |
Compare the replacement quote with your deductible before you file. A Kal Tire employee told Global News that a replacement costs at least $1,000, depending on the vehicle, and it can be much more on some trucks and hybrids. If you have a $500 deductible and a $1,200 quote, the claim is worth filing. If you have a $1,000 deductible, it may not be.
Also ask your insurer whether a claim for a second theft would be handled differently. Some drivers get hit more than once.
Your Replacement Options
- Original manufacturer (OEM) converter. Best fit and longest life, and usually the most expensive. Often required on newer vehicles to keep the check engine light off.
- Aftermarket converter. Cheaper, but quality varies. Make sure it's approved for your exact vehicle and engine, or the check engine light may stay on.
- An anti-theft shield or cage. A metal plate or cage bolted over the new converter makes the next theft much harder. Ask for one at the same time as the repair.
The Alberta Motor Association also recommends engraving your VIN on the converter. It makes it harder for thieves to sell and easier for police to trace.
Replace It or Sell the Car?
On a newer car with comprehensive coverage, replacing the converter is usually the right move. On an older car, the math changes fast. Ask yourself:
- Is the replacement quote more than half of what the car is worth?
- Do you have comprehensive coverage, or will you pay it all yourself?
- Was the oxygen sensor, exhaust pipe or wiring damaged too?
- Does the car already need other repairs?
- Are you parking in the same spot where it was stolen, with no way to secure it?
Thieves often target vehicles that are easy to get under, like trucks and SUVs, and hybrids, whose converters can contain more precious metal. If you own one of these and can't park it securely, it may be stolen again after you replace it.
Selling a Car With a Stolen Converter
The converter is one of the most valuable single parts on a scrap car, so a car without one is worth less than the same car with one. It isn't worthless, though. Its weight in steel, its engine, transmission and other parts still have value. To see how much the converter itself adds to a car's price, read our catalytic converter scrap value guide.
Tell the buyer upfront that the converter was stolen. An honest description means the offer you get on the phone is the offer you get in your driveway.
You'll also notice that legitimate buyers in Alberta are careful about converters. Under the province's scrap metal rules, dealers buying a catalytic converter must record the vehicle's VIN or proof of ownership, and they can't pay cash for it. That's what makes stolen converters harder to sell, and it's why a buyer who asks questions about your car's ownership is doing things properly.
Lower the Risk of Another Theft
- Park in a garage, or in a well-lit spot close to a building where nobody can easily get underneath.
- Install a converter shield or cage.
- Engrave your VIN on the converter.
- Set your car alarm to be sensitive to tilting or vibration, if it has that option.
- Back a truck in against a wall or fence to block access.
Frequently Asked Questions
Will my car pass an out-of-province inspection without a converter?
Plan on replacing it first. A missing converter means a damaged exhaust system and a check engine light, both of which can cause problems at inspection.
Can I sell my car without its catalytic converter?
Yes. It's worth less than a complete car, but it still has value. Tell the buyer about the theft when you ask for a quote.
How long does a replacement take?
It depends on parts. A common aftermarket converter can often be installed in a day, while an original manufacturer part may need to be ordered. After a wave of thefts, shops can also have a backlog, so call around.
Do you buy cars that won't run after the theft?
Yes. We tow it for free, so it doesn't matter whether it drives. Learn more about our junk car removal in Calgary.
Get a Firm Offer for Your Car
If replacing the converter doesn't make sense, don't sink more money into the car. Send us the year, make, model and condition, and mention the missing converter. Junk A Car Calgary gives you a firm offer, free towing anywhere in the city and payment on the spot.