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The Cost of Replacing a Catalytic Converter Explained | Rooster
Mar 27, 2025

Catalytic converters help reduce vehicle emissions, but they can be expensive to replace if they fail or are stolen. Let’s break down the cost of replacing a catalytic converter and what you can do to protect yours.

Why Do Catalytic Converters Fail?

Theft – Catalytic converters contain valuable metals like platinum, making them a target for thieves.
Clogging – Built-up debris can reduce efficiency, triggering warning lights.
Overheating – Engine misfires or rich fuel mixtures can cause damage.

How Much Does It Cost?

Replacement Cost: £800–£2,000, depending on the car model.
Labour Costs: £100–£300, depending on complexity.
Aftermarket vs OEM: Aftermarket converters can be cheaper but may not last as long as original manufacturer parts.

How to Protect Your Catalytic Converter

Park in a secure or well-lit area.
Install a catalytic converter lock or shield.
Mark your converter with a security code.
Be aware of high-risk vehicles (hybrids and SUVs are frequent targets).

Signs Your Catalytic Converter Might Be Failing

Watch out for symptoms like reduced engine performance, a noticeable drop in fuel efficiency, or a rotten egg smell from your exhaust. You might also hear a rattling noise if the internal components break down. If your engine warning light comes on, it’s worth getting your car checked sooner rather than later to avoid more costly damage.

Save on Repairs with Rooster

Need a catalytic converter replacement? Rooster helps you compare prices and save up to 50% on servicing and repairs. So download the app to save on the cost of replacing a catalytic converter.

Download the Rooster app today and keep your car running affordably!

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