Catalytic Converter Stolen? Your Options in Washington, Including Selling the Car

The order matters here. A police report and an insurance claim are both easier when you start them before anything on the car changes.

1. Confirm it and take photos

   The classic signs are a loud roar when you start the engine and a freshly cut section of exhaust pipe between the engine and the muffler. Look from the side with a flashlight, without crawling under a car that is not safely supported. Photograph the cut pipe and the area around the car, and note the date, time and place.

2. Report it to the police

   Use your local department’s non-emergency line or online reporting. Seattle Police, for example, take some property crime reports online when the incident happened inside city limits and there is no known suspect. Other cities and the county sheriffs list their own options on their websites. Write down the report number.

3. Call your insurance company

   Theft of a part is usually handled under the comprehensive part of an auto policy, not liability. Check your declarations page for comprehensive coverage and your deductible, then ask your insurer how they want the claim handled and whether they need the police report number.

4. Get a quote, and park it

   A shop will quote the converter plus any damaged parts around it, such as sensors and pipe sections. You need that number for the claim and for the repair or junk decision below. Until then, avoid driving the car: it is loud and, as explained below, not something Washington allows you to keep doing.

In 2022 Washington passed a law aimed at catalytic converter theft (Engrossed Second Substitute House Bill 1815, Chapter 221, Laws of 2022). The Legislature found that “rates of catalytic converter theft have rapidly increased statewide and nationwide”. The law goes after the buyers who turn stolen converters into cash. According to the final bill report, these are the two rules at its center:

• Proof before a scrap business buys a converter

  A scrap metal business buying a catalytic converter must record documentation showing it came from the seller replacing a part on a vehicle registered in the seller’s name.

• $1,000 fine per converter

  Breaking these rules is punishable by a $1,000 fine for each catalytic converter. Most of that money funds metal theft enforcement and training for law enforcement.

What it means for you

• It does not change the paperwork for selling your car. You still need the same title or affidavit you would need for any sale.
• It explains why an honest buyer of vehicles or parts asks for ID and ownership paperwork. A buyer who does not ask is a red flag.

This is where many owners get mixed signals, so here is what the official sources say.

There is no emissions test to fail anymore

According to the Washington Department of Ecology, the state’s emission check program ended on January 1, 2020. You no longer need an emissions test to renew your registration. So no test will flag the missing converter at tab renewal time.

That does not make it legal to drive

The same Ecology page is clear: tampering with emissions controls is illegal in Washington, and driving a vehicle with modified emissions equipment, or one that smokes, is still illegal. A car with its converter cut out no longer has its original emissions equipment, even though you were not the one who removed it.

Noise is a second problem. RCW 46.37.390 requires every motor vehicle to have a muffler in good working order to prevent excessive or unusual noise. With a section of pipe missing, the exhaust leaves the car before it reaches the muffler, which is why the car roars.

The practical answer

Treat a missing converter as something to fix or resolve, not something to live with. Drive it only as far as you must, for example to a repair shop, or have it towed. If you decide not to repair it, the car does not need to move under its own power at all: we load it onto a flatbed.

There is no single right answer. It comes down to four numbers you can collect in a day: the repair quote, your insurance deductible (if you have comprehensive coverage), what the car is worth to you repaired, and any other repairs it already needs.

Questions to ask the shop

• What exactly needs replacing besides the converter itself?
• Is the quote for a new part, and does it include labor and any sensors or pipe sections?
• Did the thieves damage anything else, such as wiring or the fuel or brake lines near the cut?
• Are there other repairs coming that I should know about before I spend money on this one?

If you are weighing every option for an old car, our guide to junking, selling or donating a car in Washington walks through the trade-offs side by side.

Yes. A missing converter changes the price, not whether you can sell the car. You have three realistic options.

• Private sale

  Possible, but be upfront about the missing converter. Most private buyers want a car they can drive home, and this one should not be driven until it is repaired.

• Trade-in

  A dealer will find the missing part on inspection, so expect a lower trade-in value.

• Sell it to us

  We buy cars as they are, running or not. We tow it for free and pay cash on the spot, so you never have to drive it again.

What a missing converter does to our offer

When we make an offer, we look at the year and model, the condition, the demand for its parts, the weight and size, and how far we need to tow it. A missing catalytic converter is a missing part, so it lowers the offer, the same way any missing part does. Some vehicles that are incomplete (a shell) may carry a fee for pickup or may be declined, so tell us what is missing when you call. You can read more about how your offer is worked out.

Send the pickup form with a few photos, or call (206) 941-0612. We call you back within 4 hours, and we are open 7 days a week, 8 AM to 11 PM. If the car also does not start, see our non-running car removal page. If it is old and worn out on top of the theft, our scrap car removal page covers that too.

A theft does not change the paperwork. Washington State law requires one of these documents before a vehicle can be disposed of:

• The Title, signed by the owners shown on it.
• An Affidavit in Lieu of Title, if the title is lost.
• A Junk Vehicle Affidavit, in the cases where one applies.

If you do not have any of them but the car is registered in your name in Washington, call us and we can help. Our Washington junk car paperwork guide explains each document and what to do if the title is missing.

After the sale

Washington DOL asks sellers to file a Report of Sale within 5 days of the sale, not counting weekends and state holidays, and to take the license plates off the vehicle. We cover both, plus insurance, in what to do after you junk your car in Washington.

One more step if you started an insurance claim: tell your insurer you are selling the car before the pickup, so the claim can be settled or closed the right way.

If you decide to fix the car, a few habits make it a less tempting target. None of them is a guarantee, but together they help.

• Where you park

  A closed garage is best. Otherwise, park in well-lit spots close to building entrances or in view of windows and cameras.

• Light and cameras

  Motion lights and a camera covering the driveway discourage people who need a few quiet minutes under a car, and footage helps a police report.

• Ask your shop

  Repair shops can tell you about shields or other protection made for your model, and whether they are worth it for your car.

Whatever you decide, keep the police report, the repair invoice and your photos together. If it happens again, you will have everything ready for your insurer.