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is what the mazda service dealership told me bullshit?

Old Sep 14, 2009 | 04:54 PM
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is what the mazda service dealership told me bullshit?

i called in today to make an appointment to switch out my cat cause its shitting out. Im about 99% sure my cat is bad because
1. my engine light is coming back as a "bad rear sensor" or o2 sensor.
2. whenever i floor it i hear crazy noises from the cat or atleast the bottom of my car and a horrible smell arises.
3. my friend who graduated lincoln tech told me its the cat.

so i called in to schedule a replacement knowing i still have emissions warrantee but the mechanic at garden city mazda NY said that the rx8 cats are on "national backorder" and could be months before they come in and that also they will have to do a diagnostic and see if its only the cat. i told him im almost positive the cat is bad but he told me that if its not "just" the cat that they would have to charge me $150 dollars diagnostic charge. I told him what my car was doing and explaining how it has to be the cat but he said it can also be the o2 sensor thats bad and if tahts the case they will have to charge me taht diagnostic fee.

iunno what to do here he said i basically rolling a dice to bring in my car referring to that diagnostic fee.

whats up with that?
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Old Sep 14, 2009 | 05:02 PM
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read the title and my immediate reaction was, "Yeah, it's probably bullshit"
(now to read the actual post and see if my initial impression is correct)


Alright, I'm not sure about this whole 'National Backorder' nonsense but my 1st question is: are you still in your standard warranty period?
If not, then YES the dealership may charge you a diagnostic fee if it turns out to not be a bad cat.
Given your description, I am leaning towards a bat cat. My RP high flow cat burned out and at high rpm's I could definitely hear a rattling sound coming from the cat. (plus the smell is usually a good indicator)

Your CEL code is troubling though as it's not necessarily the code you'd get with a bad cat. (let me double check that. brb)

Last edited by Jedi54; Sep 14, 2009 at 05:08 PM.
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Old Sep 14, 2009 | 05:10 PM
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Originally Posted by jbk
i called in today to make an appointment to switch out my cat cause its shitting out. Im about 99% sure my cat is bad because
1. my engine light is coming back as a "bad rear sensor" or o2 sensor.
2. whenever i floor it i hear crazy noises from the cat or atleast the bottom of my car and a horrible smell arises.
3. my friend who graduated lincoln tech told me its the cat.

so i called in to schedule a replacement knowing i still have emissions warrantee but the mechanic at garden city mazda NY said that the rx8 cats are on "national backorder" and could be months before they come in and that also they will have to do a diagnostic and see if its only the cat. i told him im almost positive the cat is bad but he told me that if its not "just" the cat that they would have to charge me $150 dollars diagnostic charge. I told him what my car was doing and explaining how it has to be the cat but he said it can also be the o2 sensor thats bad and if tahts the case they will have to charge me taht diagnostic fee.

iunno what to do here he said i basically rolling a dice to bring in my car referring to that diagnostic fee.

whats up with that?
national backorder my ***. I can buy one off MazdaMotorSports right now. ITs in stock and u can have as much as you want.

U might want to bring your car to places like Wayne Mazda that gives you no bullshit at all.

btw, bad smell = Bad cat 99.999999999% of the time.

Last edited by nycgps; Sep 14, 2009 at 05:12 PM.
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Old Sep 14, 2009 | 05:14 PM
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i actually had a catless agency power exahust set up and people are telling me taht could be why the code is coming up taht way cause the 02 got fried.

iunno if i should explain that to the guy or not lol...

also does anyone know why i have this really bad clanking sound by the passenger side when i hit bumps? its not a loose exhaust i checked for taht already and it sounds sooo bad... what is up with that?
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Old Sep 14, 2009 | 05:17 PM
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I was under the impression that a bad cat usually threw the following code?
P0420 Catalyst system efficiency below threshold ON 2 Catalyst

I know MM has a post around here somewhere that shows which CEL's he disables. The cat code is one of them, I just can't find the post ATM.
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Old Sep 14, 2009 | 05:18 PM
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Originally Posted by jbk
i actually had a catless agency power exahust set up and people are telling me taht could be why the code is coming up taht way cause the 02 got fried.

iunno if i should explain that to the guy or not lol...

also does anyone know why i have this really bad clanking sound by the passenger side when i hit bumps? its not a loose exhaust i checked for taht already and it sounds sooo bad... what is up with that?
you dont need to tell them anything.

its easy to tell if the cat is bad, drop it, and look inside with a "good flash light", any signs of "melting" means its going to die soon. if u see that its melting, you might as well get a piece of long pipe and start "hitting" the material inside, which means yes BREAK THEM !!!. put a mask on b4 u do it tho. Break everything. then put it back on. and drive it to dealership.

and for the "bump = clanking sound" , it could be your end link(broken), or bushing needs lube.
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Old Sep 14, 2009 | 05:35 PM
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P0037 H02S heater control circuit low (bank 1 sensor2) that's the code. Alzor told me it maybe a bad cat but that the 02 sensor is bad aswell therefore I'm not getting another code for the bad cat because it can't read it.
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Old Sep 14, 2009 | 05:41 PM
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you can check O2 sensor to see if its functional. pretty easy with Ohm meter. well I have one. not sure about you.
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Old Sep 14, 2009 | 06:10 PM
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lol. 5 more posts and you get 12000 posts!!

Last edited by shazy; Sep 14, 2009 at 06:12 PM.
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Old Sep 14, 2009 | 06:19 PM
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Its the CAT
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Old Sep 14, 2009 | 06:23 PM
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I don't even know what that is lol where in NYC are ya? Can I borrow yours ? Hehe
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Old Sep 15, 2009 | 09:48 AM
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Originally Posted by jbk
I don't even know what that is lol where in NYC are ya? Can I borrow yours ? Hehe
come out at next meet, I take my meter out. take your O2 sensor out in advance.
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Old Sep 15, 2009 | 10:21 AM
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yeah the code he is getting is for the rear 02 sensor... those generally go bad when used catless as jbk used to be...

so even if his cat is bad he probably wouldn't get the code (if it even shows up because half the time it doesnt) because the sensor itself is bad.
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Old Sep 15, 2009 | 10:48 AM
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Just to be sure, bring the sensor out so I can test it :P

brand new sensor isnt cheap ...

Last edited by nycgps; Sep 15, 2009 at 10:52 AM.
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Old Sep 15, 2009 | 11:03 AM
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http://mazdatrix.com/getprice.asp?pa...8-861B-N3H3-9U
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Old Sep 15, 2009 | 11:31 AM
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N3H3-18-861B - Rear O2 Sensor part number

120 bux Onlinemazdaparts.com :P

no tax :P

5 bux shipping :P

Well .. I can get it lower but its just me ...
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Old Sep 15, 2009 | 11:36 AM
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Originally Posted by Jedi54
read the title and my immediate reaction was, "Yeah, it's probably bullshit"
lmao soooo true
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Old Sep 15, 2009 | 11:52 AM
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very very true... good luck
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Old Sep 23, 2009 | 05:52 PM
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Originally Posted by nycgps
you dont need to tell them anything.

its easy to tell if the cat is bad, drop it, and look inside with a "good flash light", any signs of "melting" means its going to die soon. if u see that its melting, you might as well get a piece of long pipe and start "hitting" the material inside, which means yes BREAK THEM !!!. put a mask on b4 u do it tho. Break everything. then put it back on. and drive it to dealership.

I hope your not saying it's ok to completely physically trash the cat and have someone drive it to the dealer and hope for warranty coverage?

Last edited by T-von; Sep 23, 2009 at 06:06 PM.
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Old Sep 23, 2009 | 07:14 PM
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Originally Posted by T-von
I hope your not saying it's ok to completely physically trash the cat and have someone drive it to the dealer and hope for warranty coverage?
of course its not ok.

but there are dealerships out there thats "stupid enough" to say that a melted CAT is still a good CAT.
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Old Sep 24, 2009 | 06:46 AM
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Well it's happened to many people where the cat melted so much inside that the pieces just blew out making it real loud.
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Old Sep 24, 2009 | 07:14 AM
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The "rotten egg" (sulphur dioxide) smell is a dead Cat giveaway. But O2 sensors are particularly perishable as well.

Good opportunity to substitute a high flow Cat.
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Old Sep 24, 2009 | 08:27 AM
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there's no such thing as a service adviser who knows anything about anything ....
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Old Sep 27, 2009 | 11:47 PM
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From reading the exact law concerning the cats lasting at least until 80k miles....it says a dealership CANNOT charge you for the DIAGNOSTICS of the cat. I would print the law out to them and show it to them!
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Old May 10, 2010 | 07:49 PM
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where can i find a copy of the cat law?
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