Indiana catalytic converter laws restrict who can sell a detached converter, require dealers to document every purchase and pay by check above $25, and make stealing one an automatic felony. The rules sit primarily in Indiana Code Title 25, Article 37.5, with theft penalties in Title 35 and payment rules in Title 9. Federal Clean Air Act provisions control the replacement side.
Who Can Legally Sell a Detached Converter
Most Indiana residents cannot walk into a scrap yard and sell a catalytic converter. Under Indiana Code 25-37.5-1-9, a detached converter can only be sold as valuable metal by a used parts dealer or an automotive repair company. Dealers are barred from buying one from anyone else.1Indiana General Assembly. Indiana Code 25-37.5-1-9 – Catalytic Converters as Valuable Metal; Prohibition of Sale; Exceptions
There is one path for an individual who legitimately owns a converter. You must present the buyer with an affidavit signed by a law enforcement officer stating the officer reasonably believes the converter lawfully came into your possession.1Indiana General Assembly. Indiana Code 25-37.5-1-9 – Catalytic Converters as Valuable Metal; Prohibition of Sale; Exceptions The Indiana Secretary of State’s office has confirmed this affidavit is the only acceptable proof of ownership for a non-dealer seller.2Indiana Secretary of State. Auto Dealer Services Division – Catalytic Converter Compliance and Regulations
A receipt for the new converter, a photo of your car, or the vehicle title will not substitute. Without the affidavit, the sale is illegal for both sides. In practice, you’ll need to visit a local police department or sheriff’s office, explain the circumstances, and get the officer’s signature before the sale.
What Dealers Must Record and How They Must Pay
Every valuable metal dealer must document each converter purchase in detail. Indiana Code 25-37.5-1-2 requires dealers to record the seller’s name, address, age, driver’s license or Social Security number, the type of government-issued photo ID with issuing agency and ID number, the date and place of purchase, the price paid, the license plate of the delivery vehicle, a physical description and weight of the metal, the source of the metal, a photograph of the seller, a separate photograph of the converter, and a copy of the law enforcement affidavit if the seller is not a used parts dealer or repair company. The records must be kept in a separate book or register for at least two years and made available to law enforcement on request.2Indiana Secretary of State. Auto Dealer Services Division – Catalytic Converter Compliance and Regulations
Payment is regulated too. Under Indiana Code 9-32-9-14.5, an automotive salvage recycler buying a detached converter worth $25 or more must pay by check made out to the seller, and cannot cash that check for the seller or route the payment through an ATM or cash card. Cash is allowed only when the converter is worth less than $25, and the recycler may buy no more than one converter per seller per day using cash.3Indiana General Assembly. Indiana Code 9-32-9-14.5 – Detached Catalytic Converter Because the precious metals in most converters are worth well above $25, nearly every legitimate sale runs through a check.
Penalties for Stealing a Catalytic Converter
Indiana treats converter theft more harshly than ordinary theft. Under Indiana Code 35-43-4-2, theft of a component part of a motor vehicle is automatically a Level 6 felony regardless of the converter’s dollar value.4Indiana General Assembly. Indiana Code Title 35 Criminal Law and Procedure 35-43-4-2 A Level 6 felony carries a prison sentence between six months and two and a half years, with an advisory sentence of one year, plus a possible fine of up to $10,000.5Indiana General Assembly. Indiana Code 35-50-2-7 – Class D Felony; Level 6 Felony; Judgment of Conviction Entered as a Misdemeanor
If the person has a prior unrelated conviction for theft of a motor vehicle or a component part, the charge escalates to a Level 5 felony, which carries a longer sentence.4Indiana General Assembly. Indiana Code Title 35 Criminal Law and Procedure 35-43-4-2
Penalties for Illegal Sales and Purchases
Dealers and sellers who violate the valuable metal rules face separate charges. Under Indiana Code 25-37.5-1-7, knowingly or intentionally violating the chapter is a Class B misdemeanor, and a reckless violation is a Class C misdemeanor. Violating the catalytic converter prohibition in Section 9 is a Class B misdemeanor. Both buyer and seller in an illegal transaction can be charged. Complying with these dealer rules does not protect anyone from additional prosecution if the converter turns out to be stolen.
Replacing a Stolen Converter
Federal law controls what goes back on the car. Under 42 U.S.C. ยง 7522, it is illegal to remove or disable a catalytic converter installed to meet federal emission standards, and equally illegal to manufacture, sell, or install a part whose main purpose is to bypass an emission control device.6Office of the Law Revision Counsel. 42 USC 7522 – Prohibited Acts
There is an exception for legitimate repair: removing a converter to replace it with a properly functioning one is legal, as long as the replacement works correctly afterward.6Office of the Law Revision Counsel. 42 USC 7522 – Prohibited Acts You cannot replace a stolen converter with a straight pipe or a “converter replacement pipe.” The EPA considers that tampering regardless of who does the work, and civil penalties run into the thousands of dollars per violation.7United States Environmental Protection Agency. Aftermarket Defeat Devices and Tampering are Illegal and Subject to Penalties Indiana does not require California Air Resources Board-compliant converters, so an EPA-compliant aftermarket replacement is legal for vehicles registered in the state.
What to Do If Yours Is Stolen
You’ll know right away. The exhaust roar is unmistakable. File a police report before anything else; you’ll need it for insurance and to document the theft. Replacement costs vary widely by vehicle, and owners of trucks, SUVs, and hybrids tend to face the steepest bills because their converters contain higher concentrations of precious metals.
Comprehensive auto insurance generally covers converter theft, minus the deductible. If you drive a frequent target, review your coverage limits. Some owners find it worth lowering their comprehensive deductible given the replacement costs involved.
Prevention is cheaper than replacement. Parking in well-lit, high-traffic areas helps. Converter locks and shield plates bolt around the unit and force a thief to spend extra minutes with a saw, which most will not do. Etching your vehicle identification number onto the converter shell also helps law enforcement trace stolen parts. None of this makes theft impossible, but it pushes thieves toward easier targets.