Thieves and organized criminals in the U.K. are targeting vehicle catalytic converters for their precious metal value. If properly recycled, they can be worth between £50 and £100. A new catalytic converter can cost more than £2,000 to retrofit. Keeping vehicles garaged or parked in well-lit, camera-monitored areas is the best advice. Several companies offer indelible marking which can render the parts less attractive to thieves.