2 of these suggestions have a proven track record for helping to prevent catalytic converter theft. The 3rd suggestion is my own, and one I plan to employ on my 2003 Honda Pilot to prevent the catalytic converter from being stolen. I hope it works.
FYI if you have full coverage insurance on your vehicle and your catalytic converter is stolen, you may be able to file a claim for the repair. Check with your insurance company to find out if that’s the case.
VIDEO HERE (9:45 minutes)
