Catalytic Converter

[JBT2013]

I have a 2004 Nissan Murano with 160K miles.

My check engine light came on, and when I took my nissan to the dealer, he said that the catalytic converter needed to be replaced, naturally costing well over $1,000. Does that even happen anymore...? I did some asking around, and many people said that the O2 sensor could be the issue and not the Catalytic Converter. Nissan assures me that it is the catalytic converter. Does this sound right? It does not sound funny, and there are no funny odors.

[zebelkhan]

What was the code?

[njjoe]

I know it is too late, but there really is no need to take a nine-year-old car with 160,000 miles to the dealer. They just salivate when they see a car like yours pull into the service bay.

Any reputable mechanic can read the codes and perform repairs, and they can do it for a lot less.

Catalytic converters can and do fail. The MO has three cats, two of which are monitored by a set of O2 sensors. The third is not monitored by the engine control system.

The two in question are directly connected to the engine's exhaust manifold. They are called three-way cats and have an MSRP of $567. The rest of your $1,000+ is labor.

The third cat has an MSRP of $840. However, if the dealer claims the error codes are for this cat then he is BS'ing you because it is not checked by the O2 sensors.

Now if you had taken your MO to an independent garage, the parts would be much cheaper. For example, Advance Auto sells the three-way cats for $400 and the third cat for just $100.

I suggest you give them a call. What was the error code? Which cat are they replacing?

-njjoe

[Noodles]

Originally Posted by njjoe

I know it is too late, but there really is no need to take a nine-year-old car with 160,000 miles to the dealer. They just salivate when they see a car like yours pull into the service bay.

Any reputable mechanic can read the codes and perform repairs, and they can do it for a lot less.

Catalytic converters can and do fail. The MO has three cats, two of which are monitored by a set of O2 sensors. The third is not monitored by the engine control system.

The two in question are directly connected to the engine's exhaust manifold. They are called three-way cats and have an MSRP of $567. The rest of your $1,000+ is labor.

The third cat has an MSRP of $840. However, if the dealer claims the error codes are for this cat then he is BS'ing you because it is not checked by the O2 sensors.

Now if you had taken your MO to an independent garage, the parts would be much cheaper. For example, Advance Auto sells the three-way cats for $400 and the third cat for just $100.

I suggest you give them a call. What was the error code? Which cat are they replacing?

-njjoe

My cat is rumbling and making noises which i thought was fuel dampers but it wasn't because it was coming from the bottom of the car. What do you guys suggest I do since i pulled codes for knock sensor and cat bank 1? I read that you should check the exhaust manifold for a crack or leak and if it doesn't have any crack or leak replace the o2 sensor. before replacing the cat if i need to where should I order my cat from if I need it?

[john 07]

that rumbling your saying could be the sound of the cat broken up inside?
if You curl up your fist and hit the bottom of the cat. can You hear it rattle broken inside.?