11 QX56 cat replacement

A forum for the Nissan Armada, Infiniti QX56, and beginning in 2014, the Infiniti QX80
MarcinR
Posts: 1
Joined: Mon Feb 20, 2017 11:14 pm
Car: '11 QX56

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Checked the car for codes after SES came on and ended up with P0420. Along with the rotten egg smell from the exhaust i know the driver side catalytic converter is toast. Has anyone replaced one? I'm not willing to pay $2k to get it done by the dealer. The car has 82k. Any info greatly appreciated


0macman0
Posts: 10
Joined: Mon Sep 26, 2016 2:40 pm
Car: 2011 QX56

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I've done it. It's not pretty but doable. Go look at the thread on Infiniti Forum under QX56.

TeamQX56
Posts: 13
Joined: Sun Mar 29, 2015 12:38 pm
Car: Infiniti QX56

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complete Header upgrade, If your keeping it for a while if not, Like Omacman0 said: look under QX56

PetitFrereArmada
Posts: 30
Joined: Wed Feb 24, 2016 12:11 pm

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x98myers7
Posts: 10
Joined: Fri Apr 21, 2017 5:54 am
Car: 2011 QX56

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huh? yours too? did the system throw the SES light immediately after the timing chain recall service like mine did?

83k on mine, so realistically, i don't believe the cat is the problem. i've never personally known a cat to go "bad" on a car before, and i've seen most with over 150k+ miles.

jvangun
Posts: 17
Joined: Mon Dec 28, 2015 6:51 pm
Car: 2012 Infiniti QX56

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Same issue for me except that it was a 12 with just UNDER 80k and was covered under warranty. Seems like a common occurrence? Have you tired contacting Infiniti Consumer Affairs? Worth a shot right?


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