Catalytic Converter Theft - Replacement Options?
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Junior Member
Joined: Oct 2019
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2019 G550
Catalytic Converter Theft - Replacement Options?
Good day to everyone. Some bad actor(s) stole my driver's side catalytic converter and muffler assembly on my 2019 G550. It appears that they used a jack and an angle grinder or reciprocating saw and made 3 cuts leaving behind only the remainder of the twin outlet pipes at the back and part of the downpipe leading to where the cat used to be. A police report has been filed, nearby surveillance video pulled, etc., but I am not expecting much to come from any of that.
The MB dealership repair estimate is around $8k (USD) with parts and labor split about 50-50. Before I spend that much or ding my comprehensive auto policy to put it back into stock form, I wanted to consult the collective knowledge of the board on whether there is a better aftermarket option for me. I am open to something more "vocal" and performance-oriented. Moreover, I am (theoretically) open to dedicating this particular truck to "off road only" and installing a completely cat-less system as long as I can avoid a constant CEL and the resonance / drone does not become completely unbearable for basic farm and trail usage.
Any thoughts or suggestions?
For context, the truck has 39k miles on it and is in stock form and virtually mint (save for the fact that it is running 50% "open headers" at the moment). It is now parked and stored securely pending my decision on the fix here.
It goes without saying that I will not be parking the truck in that location ever again, but with the cats being in a vulnerable place on our trucks, I am not sure that there is any way to protect completely against future theft.
Thank you to all!
Sincerely,
LWSG550
The MB dealership repair estimate is around $8k (USD) with parts and labor split about 50-50. Before I spend that much or ding my comprehensive auto policy to put it back into stock form, I wanted to consult the collective knowledge of the board on whether there is a better aftermarket option for me. I am open to something more "vocal" and performance-oriented. Moreover, I am (theoretically) open to dedicating this particular truck to "off road only" and installing a completely cat-less system as long as I can avoid a constant CEL and the resonance / drone does not become completely unbearable for basic farm and trail usage.
Any thoughts or suggestions?
For context, the truck has 39k miles on it and is in stock form and virtually mint (save for the fact that it is running 50% "open headers" at the moment). It is now parked and stored securely pending my decision on the fix here.
It goes without saying that I will not be parking the truck in that location ever again, but with the cats being in a vulnerable place on our trucks, I am not sure that there is any way to protect completely against future theft.
Thank you to all!
Sincerely,
LWSG550
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
Sure you dont want to run with this....if someone (insurance) was go give you a payout...who said it has to go back to stock? Maybe turn some lemons into lemonaid!!!!
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From: NV, UT
2012 Land Rover LR4 5.0L V8 LUX HD
I'd have a pipe welded in its place and an O2 sensor defeat. The sound will be louder but if you like the V8, now is the best time to get your exhaust tuned to sound how you like it. I'd remove both cats so the back pressure is the same for both engine banks. Thieves won't be able to steal them again, problem solved because those thieves or another thief could come back after you just spent $8k.
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From: Colorado
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Removing a cat from your vehicle, whether by theft or intentional modification, can still get you in trouble for messing with the emissions system. Do what you want, but I'd restore it to original configuration, especially if you live where there are emission checks or if you plan to sell the vehicle someday. I thought the cat theft business was kaput now that metal salvage yards can't legally buy them.
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
Removing a cat from your vehicle, whether by theft or intentional modification, can still get you in trouble for messing with the emissions system. Do what you want, but I'd restore it to original configuration, especially if you live where there are emission checks or if you plan to sell the vehicle someday. I thought the cat theft business was kaput now that metal salvage yards can't legally buy them.
Or, do the smart thing and live in a place that is not communistic. As for no market for converters as it is illegal....well, drugs are illgal too.....yeah, that stopped. Now, for the OP - I would open pipe that thing all day long. The engine has a great rumble when it is not being suffocated.
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Joined: Apr 2020
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From: NV, UT
2012 Land Rover LR4 5.0L V8 LUX HD
Removing a cat from your vehicle, whether by theft or intentional modification, can still get you in trouble for messing with the emissions system. Do what you want, but I'd restore it to original configuration, especially if you live where there are emission checks or if you plan to sell the vehicle someday. I thought the cat theft business was kaput now that metal salvage yards can't legally buy them.
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Driving catless is a noise nuisance to society and harm to the earth and the air we all breathe! It is irresponsible illegal behavior like that, that forces all of us to waste time and spend billions of tax money on EPA auto inspections to make sure morons have not removed their catalytic converters spewing noxious gases in everone else's face!
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From: Colorado
G550
Federal agencies, such as the EPA, have enforcement divisions that are not known for their terrific senses of humor.
https://www.epa.gov/aboutepa/about-o...assurance-oeca
https://www.epa.gov/aboutepa/about-o...assurance-oeca
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
HA HA HA HA HA HA HA!!!!! Seriously? I just left the shop where they are putting a catless on a S600. Just about every tuner as a catless option. One of the very first upgrades folks do is go catless. I am a bit upset, the only thing I have that is catless has dual 6.7ltr engines in it.....
BUT, to think that someone in a G cant afford a cat? Wow, what an apathetic way to look at life and free will.
Oh, as a note - where I lived in Illinois...ZERO inspections. Now I am in FL...Zero inspections. So, folks need to pull their heads out of the sand as to how effective these "inspections" are. Just came to mind, I used to "rent" the stock exausts from my VR4's and my 991 Turbo for folks in Chicago to bolt on and get thier inspections (and then put their performance exhausts back on).
Last edited by OldManAndHisCar; Mar 11, 2026 at 12:49 PM.
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C230K
Yes, think about it this way. A Mercedes is a luxury car that insulates you. Sound deadening, soft suspension, quiet exhausts, and multiple cats for no smell. You remove the cat and you gain smells and noise from the exhaust. Reminds me of the beaters I see rolling around town.
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
Yes, think about it this way. A Mercedes is a luxury car that insulates you. Sound deadening, soft suspension, quiet exhausts, and multiple cats for no smell. You remove the cat and you gain smells and noise from the exhaust. Reminds me of the beaters I see rolling around town.
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All it takes is one astute policeman or an annoyed and offended neighbor who knows a policeman:
"Being pulled over in a catless (no catalytic converter) vehicle is a serious offense, violating federal EPA laws and likely local regulations. Risks include heavy fines ($1,000 to over $5,000), vehicle impoundment, failed inspections, and, in some cases, potential insurance invalidation. It is often triggered by loud exhaust or strong odors. [[url=https://www.reddit.com/r/MINI/comments/15hyyd4/pulled_over_for_emissions_read_description_i_need/]1, 2, 3, 4, 5]
Key Consequences and Risks:
AI can make mistakes, so double-check responses
[1] https://www.reddit.com/r/MINI/commen...iption_i_need/
[2] https://www.hottexhaust.com/blog/is-it-ilegal-to-drive-without-a-catalytic-converter-laws-risks-replacement/
[3] https://www.1addicts.com/forums/showthread.php?t=974694
[4] https://www.reddit.com/r/Insurance/c..._to_be_denied/
[5] https://www.carparts.com/blog/can-you-drive-without-a-catalytic-converter/
[6] https://www.youtube.com/shorts/pqYquHalPSQ
[7] https://www.facebook.com/groups/9171...8131150934732/
[8] https://www.autozone.com/diy/catalytic-converter/can-you-drive-without-a-catalytic-converter
[9] http://oreateai.com/blog/driving-without-a-catalytic-converter-what-happens-next/0d84deff276c071dd2ecf3e8bd2a524e"
"Being pulled over in a catless (no catalytic converter) vehicle is a serious offense, violating federal EPA laws and likely local regulations. Risks include heavy fines ($1,000 to over $5,000), vehicle impoundment, failed inspections, and, in some cases, potential insurance invalidation. It is often triggered by loud exhaust or strong odors. [[url=https://www.reddit.com/r/MINI/comments/15hyyd4/pulled_over_for_emissions_read_description_i_need/]1, 2, 3, 4, 5]
Key Consequences and Risks:
- Legal Fines: Removing or tampering with a catalytic converter is prohibited under the Clean Air Act, leading to substantial fines, sometimes ranging from $1,000 up to over $5,000, depending on the jurisdiction.
- Vehicle Impoundment/Defect Notice: Police can issue a defect notice or impound your vehicle until it is re-equipped with a functional catalytic converter.
- Failed Inspections: The vehicle will fail emissions tests and safety inspections.
- Law Enforcement Attention: A loud, "catless" car is often targeted for traffic stops.
- Insurance Issues: While some argue it may not affect liability, removing emission control devices can potentially cause issues with insurance claims. [[url=https://www.hottexhaust.com/blog/is-it-ilegal-to-drive-without-a-catalytic-converter-laws-risks-replacement/#:~:text=CARB%2Dapproved%20converters%20are%20mand atory%20in%20these%20regions%2C,a%20compliant%20un it%20as%20soon%20as%20possible.]2, 4, 5, 6, 7, 8, 9]
- Suspicion: Officers often notice the distinct smell of raw exhaust fumes.
- Inspection: They may check for the presence of the converter.
- Warnings vs. Tickets: Depending on the officer, you might get a warning if not driving aggressively, but a ticket is common in strict areas. [[url=https://www.1addicts.com/forums/showthread.php?t=974694#:~:text=Cops%20can%20use%2 0an%20emissions%20testing%20probe,legal%20as%20lon g%20as%20they%20are%20secured]3, 4, 6, 7]
- Reinstall: Reinstall a high-flow or factory catalytic converter to be legal.
- Legal Alternatives: Use CARB-approved converters if in a strict region (like California).
- Documented Repairs: If it was stolen, file a police report and have insurance cover it, or install a replacement immediately. [[url=https://www.reddit.com/r/MINI/comments/15hyyd4/pulled_over_for_emissions_read_description_i_need/]1, 2]
AI can make mistakes, so double-check responses
[1] https://www.reddit.com/r/MINI/commen...iption_i_need/
[2] https://www.hottexhaust.com/blog/is-it-ilegal-to-drive-without-a-catalytic-converter-laws-risks-replacement/
[3] https://www.1addicts.com/forums/showthread.php?t=974694
[4] https://www.reddit.com/r/Insurance/c..._to_be_denied/
[5] https://www.carparts.com/blog/can-you-drive-without-a-catalytic-converter/
[6] https://www.youtube.com/shorts/pqYquHalPSQ
[7] https://www.facebook.com/groups/9171...8131150934732/
[8] https://www.autozone.com/diy/catalytic-converter/can-you-drive-without-a-catalytic-converter
[9] http://oreateai.com/blog/driving-without-a-catalytic-converter-what-happens-next/0d84deff276c071dd2ecf3e8bd2a524e"
Last edited by haa; Mar 12, 2026 at 09:38 AM.
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From: Colorado
G550
I saw an article just a couple days ago about a resurgence in CC theft. Apparently, rhodium is selling for $10K/oz, and is making a few minutes work under a car time well spent. Thieves target high ground clearance vehicles for their ease of access. Maybe if wrap our CCs with razor wire . . .
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
MBWorld Fanatic!
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
I do not know a single MB driver who does not wish they did not have the AMG version of their particular car, right down to the R63. Heck, most of the folks near me in AMG cars are only in it because it was the "Best One on the lot" when they were shopping....besides, the S63 costs less than their horse.....
Thread Starter
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Joined: Oct 2019
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2019 G550
Thanks to all for your thoughtful responses. I seem to have a psychological hang-up on spending $8k to take the truck back to completely stock form. It is fully insured, but I have quite a few vehicles on my policy, and realistically, the carrier is going to get the $8k back from me one way or another, so I can pay now or pay later.
Just to be clear on the catless options, I recognize the practical (smell and noise) and theoretical (EPA enforcement) downsides to that. As I mentioned in my initial post, converting to catless straight pipes means dedicating the vehicle to off-road / farm use only. I do have a use case for that so long as running no mufflers will not result in annoying levels of resonance. Another option is restoring the stock cat on the driver's side (or installing less restrictive cats on both cylinder banks) and then incorporating more performance-oriented mufflers behind the cats.
Does anyone have firsthand experience with aftermarket muffler options for our Gs? I do not want anything that requires exhaust outlets protruding from under the running boards like the G63s as that will impair my ground clearance. In fact, one of the primary reasons that I got a G550 instead of a G63 in the first place was keeping small enough brake rotors to run 18-inch wheels and use tires with taller sidewalls (e.g., K03s) and still being able to have roof clearance in my garage. I guess that makes me the singular exception to preferring the truck that I purchased to the AMG version of it!
Just to be clear on the catless options, I recognize the practical (smell and noise) and theoretical (EPA enforcement) downsides to that. As I mentioned in my initial post, converting to catless straight pipes means dedicating the vehicle to off-road / farm use only. I do have a use case for that so long as running no mufflers will not result in annoying levels of resonance. Another option is restoring the stock cat on the driver's side (or installing less restrictive cats on both cylinder banks) and then incorporating more performance-oriented mufflers behind the cats.
Does anyone have firsthand experience with aftermarket muffler options for our Gs? I do not want anything that requires exhaust outlets protruding from under the running boards like the G63s as that will impair my ground clearance. In fact, one of the primary reasons that I got a G550 instead of a G63 in the first place was keeping small enough brake rotors to run 18-inch wheels and use tires with taller sidewalls (e.g., K03s) and still being able to have roof clearance in my garage. I guess that makes me the singular exception to preferring the truck that I purchased to the AMG version of it!
Last edited by LWSG550; Mar 14, 2026 at 10:20 AM.
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
There are literally dozens of options out there that will do exactly what you were looking for. Farm use or not you will be able to find exactly what it is you're looking for with the sound qualities you're looking for. One of my neighbors G and heck even my E63 for that matter can go from tame to crazy loud based on a switch inside the cabin.
if or my car there is absolutely no question I would not go back to stock. I'm not saying it would be loud but I know for a fact it would not be stock.
if or my car there is absolutely no question I would not go back to stock. I'm not saying it would be loud but I know for a fact it would not be stock.
Member
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From: NV, UT
2012 Land Rover LR4 5.0L V8 LUX HD
Hmmm....I am not sure that of them with an AMG badge on it would agree with that assessment.
https://youtu.be/o5sh-CXynso?t=10
https://youtu.be/o5sh-CXynso?t=10
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Joined: Nov 2015
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W463 G550, C292 GLE63s
Thanks to all for your thoughtful responses. I seem to have a psychological hang-up on spending $8k to take the truck back to completely stock form. It is fully insured, but I have quite a few vehicles on my policy, and realistically, the carrier is going to get the $8k back from me one way or another, so I can pay now or pay later.
Just to be clear on the catless options, I recognize the practical (smell and noise) and theoretical (EPA enforcement) downsides to that. As I mentioned in my initial post, converting to catless straight pipes means dedicating the vehicle to off-road / farm use only. I do have a use case for that so long as running no mufflers will not result in annoying levels of resonance. Another option is restoring the stock cat on the driver's side (or installing less restrictive cats on both cylinder banks) and then incorporating more performance-oriented mufflers behind the cats.
Does anyone have firsthand experience with aftermarket muffler options for our Gs? I do not want anything that requires exhaust outlets protruding from under the running boards like the G63s as that will impair my ground clearance. In fact, one of the primary reasons that I got a G550 instead of a G63 in the first place was keeping small enough brake rotors to run 18-inch wheels and use tires with taller sidewalls (e.g., K03s) and still being able to have roof clearance in my garage. I guess that makes me the singular exception to preferring the truck that I purchased to the AMG version of it!
Just to be clear on the catless options, I recognize the practical (smell and noise) and theoretical (EPA enforcement) downsides to that. As I mentioned in my initial post, converting to catless straight pipes means dedicating the vehicle to off-road / farm use only. I do have a use case for that so long as running no mufflers will not result in annoying levels of resonance. Another option is restoring the stock cat on the driver's side (or installing less restrictive cats on both cylinder banks) and then incorporating more performance-oriented mufflers behind the cats.
Does anyone have firsthand experience with aftermarket muffler options for our Gs? I do not want anything that requires exhaust outlets protruding from under the running boards like the G63s as that will impair my ground clearance. In fact, one of the primary reasons that I got a G550 instead of a G63 in the first place was keeping small enough brake rotors to run 18-inch wheels and use tires with taller sidewalls (e.g., K03s) and still being able to have roof clearance in my garage. I guess that makes me the singular exception to preferring the truck that I purchased to the AMG version of it!
You can get catted downpipes from Redstar between $4-5K for a full set
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My car insurance premium has doubled over the past 5 years, while the only claim I filed during this period was a cracked windshield. No traffic tickets and 4K miles/year. I'm paying like everyone else is for all the looney-tune drivers who cause accidents and for the increasing repair costs. All the safety systems that now make windshields cost $4K to replace are supported by insurers so let them pay for repairs. Same with CCs and all the other government mandated equipment. Your insurance rates are going up no matter what, so file a claim and get it fixed right.
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
Much akin to healthcare (ANY male between 18 and 62 who pays monthly for health insurance is a fool). We pay and pay and pay for the ignorance of others and "bad luck". I have three of my cars registered to one business or other....it is shocking what we can and cant do with a business policy that we cant get away with as far as coverages. It is all a game.
