Catalytic converter failure. 2006 M45

[TeamQX56]

Both Catholic converters failed error code P0420, P0430... are there any replacements or upgrades for this issue b4 I have the Stealaship(infiniti) dig there claws into this? Any advice and help is greatly appreciated

[Ilya]

Hi. What year M is this for? Or is this for your QX56? In which case, please let me know so I can move it to the correct forum.

[Larz]

If you're inquiring here because you own an M, and I hope it's an M35 and not an M45 / 56. Not that M35 CATs are a bargain, but they will be less expensive to remove / install because the M56 requires the engine be lifted to get to the CATs - lots of labor..
I had mine done on my M35 a few months back. I saved HUNDREDS by purchasing the OEM parts from Ihttps://www.infinitipartsonline.com/ but the dealer still charged me about $1,000 to install them if I remember correctly.

[TeamQX56]

Sorry Guys, should have put that in the post... 2006 M45.
Thanks again.

[EdBwoy]

No mass-market upgrades available, nor can I recommend any aftermarket catalytic converters for this engine. The ones I have seen are of poor quality, I'd rather just buy used cats.

Do you/did you regularly run regular gas in this particular car?

[gavnator]

At 84500 my 06' M35x throws a P0430 code. I took it in to Infiniti and they replaced Bank 2 3 way cat Assy, The replacement cost me $1100 that's with a 10% discount on parts and labor. Now I've got 95600 on the M and for the last 10 months intermittently it throws a P0420 code. I know what the code is saying as I have an Actron OBD2 scanner but Im not sure I believe its actually the Cat that's bad. I can erase the code and maybe 4 months later it comes on again. The M will also pass an emissions test no problem. Could this possibly be sensors and not the entire Cat that bad or a computer reading that's faulty. For now and because the P0420 code comes on so infrequent I'm just resetting it. The car runs great and I only use Top Tier 93 octane. I've owned many Nissan products and the M is my favorite but this is the only car that I've ever had Cat problems with which seems to be common place..

[midnightclub619]

I'm in CA and all CATS need to be 50 state legal so for my 07 M35x it was difficult to find any new aftermarket CAT. Actually I didn't find any new aftermarket CAT that is CA legal, outside of going straight to Infiniti to pay $600+ for a brand new one. So I went the used route and looked on eBay and also looked at kind of local Infiniti Used parts or salvage parts. For other states it might be easier to get CATS just not sure which manaufacturer are good or not good.

[TeamQX56]

No mass-market upgrades available, nor can I recommend any aftermarket catalytic converters for this engine. The ones I have seen are of poor quality, I'd rather just buy used cats.

Do you/did you regularly run regular gas in this particular car?

Always top tier 90+, owen the M with 28k on it, now I have 115k on it... no major issues, just regular maintenance.

[gavnator]

Reaching out to the forum. The dreaded P0420 code is back telling me there's a cat issue. 97,000 on the clock. Is it possible that there are sensors involved here and not the actual 3 way cat assembly? At 84,500 Infiniti replaced Bank 2 three way cat assy based on a P0430 code. Cost over $1,000. Appreciated any comments on this post.

[moftz]

Anyone have any tips on removing the right cat? I can only reach one of the three fasteners that hold it to the exhaust manifold. I got one off fine and another I can reach but can't seem to get enough leverage to turn. The other is a bolt I think and while I can see it, I have absolutely no clue how I will be able to turn it.

[moftz]

Anyone have any tips on removing the right cat? I can only reach one of the three fasteners that hold it to the exhaust manifold. I got one off fine and another I can reach but can't seem to get enough leverage to turn. The other is a bolt I think and while I can see it, I have absolutely no clue how I will be able to turn it.

For anyone else having trouble getting the passenger catalytic convertor off, there are two nuts on the exhaust manifold side that can come off with enough leverage and pb blaster and another nut on the cat side that you can get off with a very long t-handle if you go up and over the cat. Maybe if you have an open-ended ratchet that could work but the long t-handle was cheap at harbor freight. I was replacing the front drive shaft so the cat needed to come out and the transfer case support had to be removed.