How Many Catalytic Converters Does This Car Have? - 2CarPros

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How many catalytic converters does this car have? Tiny TODDER57
  • MEMBER
  • 2002 NISSAN MAXIMA
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 151,000 MILES
How many catalytic converters are on the car listed above GLE model? Thursday, March 17th, 2022 AT 10:27 AM

4 Replies

Tiny JACOBANDNICKOLAS
  • MECHANIC
  • 110,192 POSTS
Hi, There is a total of three. Each exhaust manifold at the engine has one and there is a third one in the rear. If you look at the pic below, it provides the part numbers for each converter. Don't be alarmed by the price. That is a retail price for original equipment parts. You can get them for much less. If you look at pic 2, I included the manifold and converter so you can see how they attach at the engine. Pic 3 shows what the rear one will look like. Where the converters are attached to the manifolds, from there a Y pipe connects, and on the opposite side is the rear converter. From that point, it will go to the muffler and out of the vehicle. Here is a link you may find helpful when replacing the part or parts: https://www.2carpros.com/articles/catalytic-converter-replacement Take care and let me know if I can help. Joe See pics below. Images (Click to make bigger)ThumbThumbThumb Was this answer helpful?YesNo Thursday, March 17th, 2022 AT 7:36 PM Tiny JACOBANDNICKOLAS
  • MECHANIC
  • 110,192 POSTS
Hi, There are a total of three. Each exhaust manifold at the engine has one and there is a third one in the rear. If you look at the pic below, it provides the part numbers for each converter. Don't be alarmed by the price. That is a retail price for original equipment parts. You can get them for much less. If you look at pic 2, I included the manifold and converter so you can see how they attach at the engine. Pic 3 shows what the rear one will look like. Where the converters are attached to the manifolds, from there a Y pipe connects, and on the opposite side is the rear converter. From that point, it will go to the muffler and out of the vehicle. Here is a link you may find helpful when replacing the part or parts: https://www.2carpros.com/articles/catalytic-converter-replacement Take care and let me know if I can help. Joe See pics below. Was this answer helpful?YesNo Thursday, March 17th, 2022 AT 7:36 PM Tiny TODDER57
  • MEMBER
  • 5 POSTS
My catalytic converters are clogged according to the Nissan dealership. I had a mobile mechanic from a service called yourmechanic come here to trouble shoot a misfire code he ran my car for almost 30 minutes as he was telling me how bad it was to run my car for a long time while not running properly. Saying it was a necessary evil and had to be done. Had towed to Nissan said cat converters clogged. I have ordered all 3. As they said maybe all are clogged when the car is warmed up it has no power and can't drive at all. Which cat converter should I start with? Doing 1 at a time has already replaced 1 02 sensor. Please give me advice on how to bbn proceed. Was this answer helpful?YesNo Friday, March 18th, 2022 AT 11:41 PM Tiny JACOBANDNICKOLAS
  • MECHANIC
  • 110,192 POSTS
Hi, If you had a misfire that was allowing raw fuel to enter the converters, certainly that can damage one. We have two ways to do this. First, if you know which cylinder had the misfire, we can determine which side of the engine it is on and start with that converter (right off the exhaust manifold). Or you can remove the upstream oxygen sensors one at a time and drive it to see which removed sensor allows the engine to run better when warm. This will set a code again, but by removing the sensor, you allow a bit more room for the exhaust to exit the engine. It may not be perfect, but it should be a noticeable improvement. If you notice that one side makes a difference (that's why I said 1 side at a time), replace the converter on that side off the exhaust manifold. Let me know if this helps or if you have other questions. Also, if you choose to remove the sensors, do it with the engine cold. They will be extremely hot if you don't. Let me know what you find or if there is anything I can help with. Also, I attached two pics below showing the locations of the upstream sensors. There are very close to the manifolds. Take care, Joe PS: One other note. Oftentimes, a plugged catalytic converter will glow red hot when the engine is at operating temp. See if any do that before proceeding with the aforementioned tests. It may save you time. Additionally, there is a chance it is the rear converter. If that is the case, you should notice improvement regardless of which side sensor is removed. So, it may be wise to do both sides (one at a time). Images (Click to make bigger)ThumbThumb Was this answer helpful?YesNo Saturday, March 19th, 2022 AT 6:30 PM

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