tomm_mn

I did a bunch of searches but did not find anything. Has anyone had to replace a Cat? I was quoted $1900 by the dealer and I know most of that is the part but thought there might be alternatives???

Thanks in advance

T

touareg

Well first, these are all bolt on parts, so you can change your self if the car hasn't fused them together yet

List price is about 900 dollars, suncoast is usually around 20% off of that so 780 bux.

For rears: Left is 955.113.023.20 and right is 955.113.024.20 I believe.

For fronts is looks like it is a few pieces:
L 955.113.021.00 for maybe just the cat at $414. R 955.113.021.00 There is another part number where the last 00 changes to 01 and is around 1100 each.

Second, may I ask why you are replacing? Did you damage yourself? If no I would think this would be fixed under the mandatory federal emissions warranty? Assuming you are in the USA.

From: http://www.epa.gov/oms/consumer/warr95fs.txt

What Are Specified Major Emission Control Components?

There are three specified major emission control components,
covered for the first 8 years or 80,000 miles of vehicle use on 1995
and newer vehicles:

* Catalytic converters.

* The electronic emissions control unit or computer (ECU).

* The onboard emissions diagnostic device or computer (OBD).

Catalytic converters are critical emission control components
that have been installed on most cars and trucks manufactured since
1975. Since engines don't burn fuel completely during the combustion
process, the exhaust contains a significant amount of harmful
pollutants such as carbon monoxide, hydrocarbons, and oxides of
nitrogen. The catalytic converter aids the conversion of these
pollutants to less harmful substances such as carbon dioxide, water
vapor, nitrogen, and oxygen before the exhaust is expelled into the
environment.

The electronic emissions control unit or computer monitors
certain powertrain functions and controls various operating parameters
to help the vehicle run efficiently and with the lowest possible
emissions. Ignition, transmission function, air injection, exhaust
gas recirculation (EGR), engine operating temperature and fuel system
parameters are some of the systems monitored and/or controlled by the
electronic emissions control unit.

The onboard emissions diagnostic device monitors the operation of
a vehicle's emission control system and alerts the driver with a
dashboard light when malfunctions occur. The system will record where
the problem is occurring and assist automotive technicians in
diagnosing and repairing emission control malfunctions. Since some
emission control malfunctions do not have an adverse effect on vehicle
performance, they can go undetected by the driver for quite some time.
The onboard diagnostic device will help catch malfunctions early,
preventing a significant output of harmful exhaust emissions from your
vehicle, and possibly in time to be covered by the emissions control
warranty. Often this "device" is part of the electronic control unit
mentioned above.

In the future, there may be other parts or components that
qualify for this coverage. Check your owner's manual or warranty book
for possible additional coverage.


How Long Do the Emissions Warranties Apply to Individual Parts of My
Vehicle?

For 1995 and newer model year vehicles, emission control and
emission related parts are warranted for the first 2 years or 24,000
miles of vehicle use. Specified major emission-control components are
warranted for the first 8 years or 80,000 miles of vehicle use.

RxPorsche

Replace the last ones with Fabspeed cat deletes for $580.00.

http://www.fabspeed.com/cayenne.html

You will be happy.

medtech

The only issue might be getting access to the main cats. If there's not a DIY somewhere, then I would suggest taking a look so you can be sure to have all the tools you will need.

Just to replace the secondary cats I had to remove the transmission brace and move the pipes back and forth to get in there. Really I needed a wrench w/ ratcheting capability, which I didn't have. It took friggin forever to remove 6 x 2-3 inch bolts one quarter turn at a time.

tomm_mn

I am at 84K miles so the warranty does not apply...bummer. I think the light originally came on before 80K though so maybe the dealer will go to bat for me or Porsche will cover it because it is so close...I'll check.
Thanks!

GT3 Racer

Parts at discount Porsche Dealers running 950.00 each. My mechanic friend states it is a 10 hour job for both. I plan on doing most of the work myself with his help. 130k miles on ours(04).

quip11

Hello, I am faced with most likely replacing my catalytic converters on my 08 GTS with 128K miles. I have P0421 and P0431 codes. I already replaced all 4 O2 sensors, but the codes came back. So far, I've replaced thermostat, thermostat housing and updated the coolant lower pipe in the process as well. I've searched and ran out of other options on how to get rid of these codes. Do these codes mean front or rear cats? I'd appreciate any other suggestions or expertise anyone may have on this matter. If you could share some diy instructions on performing this task, thank you.

sup44

im also doing this. I found a little info on a different forum. Apparently you can access from removing wheel and engine cover. I bought my pass side replacement for under 350 shipped. here is the link to the thread. https://www.renntech.org/topic/46855...ent-procedure/

Pinarcr

If your state has emissions requirements, i'd be very hesitant about going with anything non OEM. Ten hours of labor seems right considering how much needs to be removed to gain access, and then change out the CC's- to go through all that, and than still not have the fault code clear (which I have heard of happening with non-OEM converters) would be a kick in the pants. Even if the aftermarket unit has a warranty, it would most likely only apply to the part, and not labor.

Rossi

The codes are related to front (primary cats) as the secondary cats are not monitored.

You could use some spacers for you downstream O2 sensors (after cat) to get rid of the code.

Rossi

Anyone replaced their primary cats with Hanksville primary cats delete pipes? Just wondering if the use of O2 spacers got rid of the codes.

http://www.hhrproducts.com/porsche-c...ete-downpipes/

user 83838290

I have de-cat DPs.
The primary O2 sensors will NOT throw a code since they are before cats.
Secondary sensors are easily coded out by a tuner while they are still connected to pass visual inspection.

Rossi

How common is it to need to replace cats due to decreased Efficiency?
Anyone have gone through replacement?

malahhaor

Bump

Has anyone thought of using careless downpipe with mini cats on the sensors. Then getting 200cell cats done where secondary cats are right now?
All n all will not be cheapper but turbo spool up time would be awesome and you can still breath at the stoplight.

user 83838290

Yes. It works. You don't need any minicat on sensors. Primary O2 sensors are BEFORE cats.

I went with 100 cell IIRC.