Catalytic converter replacement -- OEM or aftermarket? - Mercedes-Benz Forum
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#1 (permalink) Old 05-05-2012, 03:31 PM
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Catalytic converter replacement -- OEM or aftermarket?

I took my 2002 E320 wagon to the dealer, 65,000 miles, and they want $1500 to replace the right (passenger seat) catalytic converter. Ridiculous. Is this something I can go aftermarket on with my independent mechanic?
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#2 (permalink) Old 05-05-2012, 05:22 PM
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I took my 2002 E320 wagon to the dealer, 65,000 miles, and they want $1500 to replace the right (passenger seat) catalytic converter. Ridiculous. Is this something I can go aftermarket on with my independent mechanic?
waxbean2000,
I needed to replace the my catalytic Converter on my 1999 E320 wagon left side, however did lots of research here and my problem was finding the an after-market front or pre cat converter, the rears were easy. The price MB quoted you for, most likely was for the whole assembly for the pass side in which includes the front and rear cat, it's a bolt on assembly (no welding). This is what I decided to do, replace the whole left side assembly myself. I'm looking at the walker assembly (for 49 states only, not Ca.) from advance auto, in which will also fits your year wagon. Here's the link for the right side, it's thee most inexpensive assembly I've found. It list for $518.99 plus a 15% discount.
Buy Walker Converter - Ultra Direct Fit 56175 at Advance Auto Parts

Last edited by carltwo; 05-05-2012 at 05:35 PM.
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#3 (permalink) Old 05-05-2012, 05:27 PM
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It all is dependent on the inspection requirements in your state - Federal aapproved non-MB catalytic converters are available, and ANY competant exhaust shop can do the work.

In Calif there regulations require the catalytic converter to also be CARB approved in addition to Federal approval - up to recently the only CARB approved cat was either a new MB (check parts.com for internet pricing genuine MB part) or there are rebuilt genuine MB catalytic converters available in limited/phone-in/check from places like KO Performance and some of the other specialty internet parts houses.

Do a forum search for more information.

Keep the faith !
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#4 (permalink) Old 05-05-2012, 06:37 PM
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Rockauto.com has the Walker assembly for $485...they have other brands for under $450 (some not legal for sale in California).

If you can turn a wrench you can probably do it yourself...in an hour or less (unless bolts are stuck, which they are likely to be).

1997 W210 (E320) - 151,000
2002 Chrysler Town and Country - 140,000
2007 Volvo V70 - 78,000
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#5 (permalink) Old 05-05-2012, 07:56 PM
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Originally Posted by waxbean2000 View Post
I took my 2002 E320 wagon to the dealer, 65,000 miles, and they want $1500 to replace the right (passenger seat) catalytic converter. Ridiculous. Is this something I can go aftermarket on with my independent mechanic?
Ask them for the OE reman one. They are less expensive. Hope they have one for your model year.

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#6 (permalink) Old 07-08-2012, 07:35 AM
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I have the same issue and my local shops said they would be able to weld in a universal cat. They told me they would use an AP exhaust tech with part #608284. The quoted me $350 installed. But i found one on ebay for about $100 shipped.
AP EXHAUST 608284 Catalytic Converter | eBay
I'll bring it to a shop and have them weld it in.

I'll be doing it soon and I'll post my results as far as fitment.
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#7 (permalink) Old 07-08-2012, 07:48 AM
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I have the same issue and my local shops said they would be able to weld in a universal cat. They told me they would use an AP exhaust tech with part #608284. The quoted me $350 installed. But i found one on ebay for about $100 shipped.
AP EXHAUST 608284 Catalytic Converter | eBay
I'll bring it to a shop and have them weld it in.

I'll be doing it soon and I'll post my results as far as fitment.
Yeah, the shop shouldn't charge more than $20-$30 to weld. Otherwise, take it to another shop. Don't fall for the crap that they will try to feed you with such as "warranty" or "legalities" and make sure that they do this in your sight. Warranty will be actually provided by the part company, provided a professional is putting them on for you so save the receipt.
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#8 (permalink) Old 07-09-2012, 09:57 AM
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Im in the same boat with my w210 e430. I need to replace both front cats with plans to delete the secondary cats and install x pipe. Problem I have is finding the part and part # for front cats. Want to go with Magna Flow or flowmaster or maybe even Eastern or walker. If someone has done this before please post the part number for the front cats. I dont need info on rear cats as those are being by passed and if I wasnt I know which ones would fit.
Thanks for any info.
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#9 (permalink) Old 07-09-2012, 06:50 PM
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For front/primary cats, I just bought some walkers but have not yet put them on. I think you need 81807 -- it is listed for "all" mercedes from 1006 to 2002 on Amazon site and specifically for 1998 E430 (and my 97 E420) on the Walker website. This is a 50 state legal cat, so good even in california. Unfortunately, it doesn't look like Walker has a completely up to date application listing for this unit as it doesn't come up on later E430's on their site (but I'm pretty sure that the application is the same for all E430's).

Amazon.com: Walker 81807 Direct Fit Converter: Automotive

Keep in mind that this isn't quite as simple as welding in the back cats as I think some effort will go into keeping the o2 sensor holes and due to where the cats are located.

"The overall best use of the E420 is not for commuting to work, impressing our mothers, or making sibs jealous. It's for driving as though you were being chased by dogs. Across Montana." (from a review found online)[/SIZE]

Last edited by ca_tallguy; 07-09-2012 at 06:56 PM.
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#10 (permalink) Old 07-09-2012, 07:24 PM
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IMHO, aftermarket would be perfectly acceptable...in a lot of cases you'll find a better made part cheaper if it doesn't have that star on it.

1997 W210 (E320) - 151,000
2002 Chrysler Town and Country - 140,000
2007 Volvo V70 - 78,000
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