Catalytic Converter Replacement Cost for Mercedes-Benz 300SEL

Catalytic Converter Replacement Estimate (National Average)

Validated estimate range for national average.

The average cost for a Catalytic Converter Replacement is between $1122 and $4036. Labor costs are estimated between $237 and $300 while parts are priced between $885 and $3736. Get a personalized estimate based on your location and specific car. Estimate does not include taxes and fees.

Parts & Labor Breakdown
Labor: $237 - $300
Parts: $885 - $3736
Estimate does not include taxes and fees.
Best Practices

Catalytic converters are vehicle-specific parts. We recommend using a high quality new part, which is required by emissions control programs in many states.

Common Symptoms

A failing catalytic converter can cause a Mercedes-Benz 300SEL to fail emissions tests and the Check Engine Light to illuminate. The exhaust might have an unusual smell.

A "restricted" catalytic converter can result in a loss of engine power.

Common Misdiagnoses

It is very important to have the shop identify why the catalytic converter failed. Failure is almost always due to another problem, which if not resolved, will quickly ruin a new catalytic converter.

Last step before receiving your estimate:
* Estimate for all Mercedes-Benz 300SEL model years. Get a more accurate price by entering in your year.Choose Year (1990-1991)
Select year:
  • 1990
  • 1991