BMW 735i Catalytic Converter Replacement at your home or office.

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Catalytic Converter Replacement Service

How much does a Catalytic Converter Replacement cost?

On average, the cost for a BMW 735i Catalytic Converter Replacement is $886 with $763 for parts and $123 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1985 BMW 735iL6-3.5LService typeCatalytic Converter ReplacementEstimate$3471.63Shop/Dealer Price$4324.92 - $6833.59
1986 BMW 735iL6-3.5LService typeCatalytic Converter ReplacementEstimate$3445.63Shop/Dealer Price$4298.96 - $6807.66
1987 BMW 735iL6-3.5LService typeCatalytic Converter ReplacementEstimate$1649.37Shop/Dealer Price$2053.63 - $3215.13
1989 BMW 735iL6-3.5LService typeCatalytic Converter ReplacementEstimate$1649.37Shop/Dealer Price$2053.58 - $3215.04
1988 BMW 735iL6-3.5LService typeCatalytic Converter ReplacementEstimate$3011.75Shop/Dealer Price$3756.64 - $5939.95
Show example BMW 735i Catalytic Converter Replacement prices

What is the Catalytic Converter all about?

The catalytic converter is an emissions related component that is mounted in the exhaust pipe. Its purpose is to superheat unburned particles in the exhaust gases that are expelled from the engine. As the engine runs, the catalytic converter warms up to an operating temperature of 500-1200 °F. At this temperature the particles in the ‘dirty’ exhaust are burned and converted into water vapor and carbon dioxide. The catalyst inside is nearly always comprised of precious metals such as platinum, rhodium, or palladium. When the catalyst isn’t able to burn off the unburned hydrocarbons in the exhaust, an unpleasant odor can occur, a rough run or misfire may be felt, or the Check Engine light may illuminate.

Keep in mind:

  • Most cars will require the aftermarket Catalytic Converter to be welded to the exhaust pipes. Mobile mechanics can only do this service if you have a direct fit catalytic converter bought from a dealer.
  • When replacing the catalytic converter, it may be necessary to replace oxygen sensors as well.
  • Catalytic converter symptoms are often similar to other more straightforward issues. Get the Check Engine light diagnosed anytime it illuminates.

How it's done:

  • The vehicle is raised and supported on jack stands
  • The defective catalytic converter is removed
  • The new catalytic converter is installed and the vehicle is started to check for any leaks
  • The vehicle is lowered off the jack stands
  • The vehicle is road tested for proper operation

Our recommendation:

If you are consistently taking short trips with your vehicle, the catalytic converter may not be getting hot enough to completely burn away the hydrocarbons. To prevent the catalytic converter from getting clogged, take your vehicle for the occasional drive on the highway for 15 minutes. This allows the exhaust to sufficiently heat up and burn off any deposits in the catalytic converter.

What common symptoms indicate you may need to replace the Catalytic Converter?

  • Check engine light is on or flashing
  • Car has little or no power
  • Smell of rotten eggs inside the car or out of the exhaust
  • Poor fuel economy
  • Backfiring and rough running

How important is this service?

If the catalytic converter isn’t operating efficiently, the check engine light will come on and your engine can begin to lose performance. If the catalytic converter becomes plugged, the engine light will begin to flash and your engine may stall or no longer start. In extreme cases where the converter is plugged, the excess back pressure created can actually cause internal engine damage. If you are experiencing symptoms related to catalytic converter failure, get it checked soon.

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Chris

22 years of experience
2247 reviews
Chris
22 years of experience
BMW 735i L6-3.5L - Brake Master Cylinder - San Juan Capistrano, California
Chris was punctual and professional. Very efficient and knowledgeable. Work was done in the manner that I expected. Good mechanic...

Zave

17 years of experience
41 reviews
Zave
17 years of experience
BMW 325i L6-2.5L - Catalytic Converter - Charlotte, North Carolina
Thanks

Charles

17 years of experience
176 reviews
Charles
17 years of experience
BMW X5 V8-4.4L - Catalytic Converter - Washington, District of Columbia
He arrived on time and finished the job in a timely manner. I'm very pleased with the work he did and his knowledge and professionalism. A great mechanic.

Chris

16 years of experience
18 reviews
Chris
16 years of experience
BMW M6 V8-4.4L Turbo - Pre-purchase Car Inspection - Dallas, Texas
Did a great pre-purchase inspection, and pointed out the things i asked from him and the stuff i missed too.

Excellent Rating

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Number of BMW Catalytic Converter Replacement services completed
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services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
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