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How many catalytic converters are there on the car

Tiny
SHINROC
  • MEMBER
  • 2003 NISSAN MAXIMA
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
I was recently told the catalytic converters on the car listed above were bad and needed to be changed. I just started buying parts online when fixing on the car and it seems to be cheaper, but it has become a headache trying to find information on certain parts. Looking online I cannot seem to narrow down how many catalytic converters on on the car and what the names are ie. Bank 1, front, rear and all that? Please help.
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Friday, October 5th, 2018 AT 3:16 PM

10 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

There are three catalytic converter for your car. Here is a diagrams and the price and parts numbers for you with a guide on how to change them out. One at each exhaust manifold and one under the car.

Parts Information OEM Part Price
Catalytic Converter
Front
Right Bank
Catalytic Converter B08A15Y700 723.48
Left Bank
Catalytic Converter 208A25Y827 709.29
Rear
Catalytic Converter 208005Y525 723.48

https://www.2carpros.com/articles/catalytic-converter-replacement

Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Sunday, October 7th, 2018 AT 12:16 PM
Tiny
SHINROC
  • MEMBER
  • 2 POSTS
Thank you so very much Mr. Ken. I really appreciate the help.
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Tuesday, October 9th, 2018 AT 10:47 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
No problem. Use 2CarPros anytime, we are here to help. Please tell a friend.

Cheers, Ken
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Tuesday, October 9th, 2018 AT 11:09 AM
Tiny
JOLYNP
  • MEMBER
  • 1 POST
  • 2001 NISSAN MAXIMA
Other Category problem
2001 Nissan Maxima 6 cyl Wheel Drive Type unknown Automatic 99800 miles

First, I'm wondering how many catalytic converters are on my 2001 Nissan Maxima? I have been told there are two by one mechanic and three by another. I have been told that they need to be replaced. Do I need them ALL replaced? How does a mechanic check to see which one may be giving me problems? My car seems to be bogged down when trying to accelerate, sometimes it won't speed up at all when I press the gas pedal completely to the floor. This is especially the case when my car is still cold or when trying to climb hills.

Thank you.
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Tuesday, October 9th, 2018 AT 11:09 AM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
I belive there are two on your vehicle. They can be found out if they are bad by a digital pyrometer, or by the o2 sensors located after the catalytic converter.

Or he may decide to hook up a vaccum guage and idle the car at 2500 rpm's for a few minutes and if the accellerator is constantly being pushed to maintain the rpm's or the vaccuum slowly but steadily goes down, then you have a restricted catalytic converter.
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Tuesday, October 9th, 2018 AT 11:09 AM (Merged)
Tiny
CMSULL17
  • MEMBER
  • 1 POST
  • 2005 NISSAN MAXIMA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 99,000 MILES
Have a service engine soon light that has been constantly on for a while now.
Was read via scanner by one mechanic who said it's the catalytic converter and needs to be replaced, or the car won't pass emissions inspection.
The car's performance has been fine, however when I previously brought it to the same mechanic a month ago regarding the check engine light, he said it was the O2 sensors and ended up replacing all 3 of them for about $600.
Does this seem right? Did the sensors really need to be replaced the first time, if the scanner was also reading "catalytic" problem back then?

Secondly,
would an aftermarket catalytic converter be a good idea for this vehicle, with the year and mileage on it?

Thank you,
Chris
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Tuesday, October 9th, 2018 AT 11:09 AM (Merged)
Tiny
MADMIKE1735
  • MECHANIC
  • 951 POSTS
What is the code its throwing? If its a cat effiecency code, it will be a P0420. A cat doesnt gp bad on its own. I suggest having all o2 sensors replaced prior, as they are what tells the computer if the cat is working or not. As you already did this, then the cat is most likely no good and does need to be replaced. As far as aftermarket goes, that should work just fine. Keep me posted.
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Tuesday, October 9th, 2018 AT 11:09 AM (Merged)
Tiny
RICKCHAP20
  • MEMBER
  • 2 POSTS
  • 2003 NISSAN MAXIMA
  • 6 CYL
  • 70,254 MILES
I have a 2001 nissan maxima and my cat converter is clogged. How much will I be paying in the shop to get it fixed? Also is there any way I could get it to start so I could get it to the shop?
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Tuesday, October 9th, 2018 AT 11:10 AM (Merged)
Tiny
RICKCHAP20
  • MEMBER
  • 2 POSTS
I meant a 2001 not 2003.
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Tuesday, October 9th, 2018 AT 11:10 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
There are 3 cayalytic converter on vehicle.

OEM catalytic converter is listed at $764.37 and $ 845.14 depending on which one. Book time for replacement is from 0.7 to 1.8 hour depending on how many is being replaced.

After market catalytic conveters are available and would be at a much lower price.

If the catalytic converter is clogged, you need to remove it to be able to start.
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Tuesday, October 9th, 2018 AT 11:10 AM (Merged)

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