Theft and security
Catalytic converter stolen? What to do next
A sudden roar when you start the engine usually means the catalytic converter has been stolen. What to do next, and how to stop it happening again.
Theft and security
Catalytic converter theft: what to do, and how to protect your vehicle.
Looking for the basics? Our Help & Advice guides cover how catalytic converters and DPFs work, fitting, the law and warranty.