Mercedes-Benz catalytic converter replacement cost

Replacing a failed or stolen cat. Emissions-legal parts vary a lot by market. Figures below are adjusted for Mercedes-Benz's premium parts and labour tier.

Mercedes-Benz catalytic converter replacement price by country

2026 estimated catalytic converter replacement cost by country
CountryPartsLabourTotal 2026
United States (USD)$245–$1,890$110–$680$355–$2,570
Canada (CAD)CA$340–CA$2,645CA$130–CA$760CA$470–CA$3,405
United Kingdom (GBP)£230–£1,795£70–£495£300–£2,290
Australia (AUD)A$390–A$3,025A$140–A$800A$530–A$3,825
France (EUR)€255–€1,985€75–€475€330–€2,460
United Arab Emirates (AED)AED 950–AED 7,370AED 155–AED 1,235AED 1,105–AED 8,605

Estimates are modelled from published independent-workshop hourly rate bands per country and the aftermarket-to-OE parts spread listed by the online retailers we link to. They are planning ranges, not quotes — dealer pricing, taxes and regional labour rates can fall outside these bands.

Buy the parts yourself: save $110$680

Shop labour is the bigger half of most quotes. If you fit it yourself, your cost is the parts line only — $245–$1,890 in the US.

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Signs your Mercedes-Benz needs this job

  • P0420 / P0430 codes
  • Rotten-egg smell
  • Loss of power at high revs
  • Failed emissions test

Red flags in a Mercedes-Benz quote

  • Fitting a cat before checking for an upstream fault that killed the last one
  • Non-compliant cats in emissions-tested regions

Frequently asked questions

How much does catalytic converter replacement cost on a Mercedes-Benz in 2026?
Budget $355–$2,570 in the US: $245–$1,890 parts and $110–$680 labour. Estimates are modelled from published independent-workshop hourly rate bands per country and the aftermarket-to-OE parts spread listed by the online retailers we link to. They are planning ranges, not quotes — dealer pricing, taxes and regional labour rates can fall outside these bands.
Is catalytic converter replacement more expensive on a Mercedes-Benz?
Somewhat. Mercedes-Benz parts usually run around 35% above mainstream brands, and many jobs need brand-specific diagnostic tools.
Can I fit catalytic converter replacement parts on a Mercedes-Benz myself?
DIY difficulty for this job is rated Hard, with 1–3.5 hours of book time.

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Catalytic converter replacement on other brands