Modded Exhaust & Warranty... - MBWorld.org Forums

Dec 4, 2019 | 04:45 PM

WillA206

Thread Starter

Junior Member

Joined: Dec 2018

Posts: 24

Likes: 5

Mercedes Benz C63 AMG

Modded Exhaust & Warranty...

I currently have the resonators removed but I would like to go louder, if I were to remove the secondary cats, how likely would it be that this mod voids warranty?
I think in most cases they have to prove that the mod causes the fault, what could the secondary cat removal fault in the future?

Dec 4, 2019 | 05:15 PM

curt.r

Senior Member

Joined: Nov 2017

Posts: 269

Likes: 27

From: Bay Area

2013 P31 C63 Sedan

Quote:

Originally Posted by WillA206

Removing the secondary cats would only void emissions warranty. Being that the secondary cats are post O2 sensors, removing them wouldn't trigger the CEL, or foul out the O2 sensors. That being said, if you live in a state with SMOG, the car would fail the visual inspection. The Magnuson-Moss Act forces the dealer to prove the modification/aftermarket part caused the failure of a component before denying warranty coverage. If you remove your secondary cats, the chances of something failing because of it are highly unlikely to no chance at all.

Last edited by curt.r; Dec 4, 2019 at 05:19 PM.

Dec 4, 2019 | 05:48 PM

Bonesxxx

Senior Member

Joined: Feb 2018

Posts: 339

Likes: 108

From: Virginia USA

2016 GTs, 2014 C63 AMG and 2014 C350 Sport (wife's car, she thinks it's an AMG - shhhhhh)

Quote:

Originally Posted by WillA206

What warranty is the first question that needs to be answered. Given that the last 204 rolled out of the showroom in 2015 you are either on a CPO or extended warranty from MB or an aftermarket warranty. They have different terms and such. I think Curt is correct if you have an MB warranty.

If it's a third-party warranty, they may be more likely to hunt for any excuse not to honor a claim (although a minor mod like that shouldn't even get noticed unless they are total *****s)