Also called cat, catalyst.
How you know it is this
- A catalyst efficiency fault code
- A rattle from inside the converter — the honeycomb has broken up
- A smell of sulphur or rotten eggs
- Loss of power and a car that will not rev, because the converter has melted and blocked
- Failed emissions at registration
Worth knowing before you buy
- A converter almost never dies of old age. A misfire, burning oil or running rich melts it, so find that cause or the new one goes the same way.
- A rattle means the honeycomb has broken up, and the pieces travel downstream and block the rest of the exhaust.
- Many engines have two, one per bank, and the fault code names which.
- They contain precious metals, which is why they are valuable, why they are stolen, and why they cost what they do.
- This is a registration item. A car with a failed converter will not pass.
What we need to quote it. The engine code, and which bank if the code names one. The chassis number settles the generation, the body and usually the engine in seventeen characters — it is on your mulkiya. A photograph of the old part helps where there is more than one version.
Rest of the after-treatment
Get in touch
Catalytic converter for your Mercedes-Benz?
Send the chassis number and a photograph of the old part. We come back with genuine, OEM and aftermarket options priced side by side, with lead times.
Mon–Sat, 8:00 AM – 6:00 PM · +971 54 303 3119 (Operations Director) · +971 54 241 0599 (Managing Director)