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Cadillac STS Replacement Catalytic Converter Information


Did you know that catalytic converters can stop working as they age, causing your engine to belch out dangerous fumes and poisonous gas? Yes, this is the purpose of a catalytic converter: to convert the toxic byproducts of internal combustion engines to environmentally acceptable substances. When the catalyst is used up, you need a new Catcon. Designed to meet or exceed GM emissions requirements, our genuine OEM replacement part Catalytic Converters will return your Cadillac STS exhaust emissions to correct levels. Properly selected and installed, they are compatible with emissions standards in 49 states (excepting California) and guaranteed to get your Caddy back to factory specifications in time for the emissions test. Why pay more for the same item? Genuine OEM parts are PartsGeek.com's stock in trade. This official Cadillac replacement part will add new life to your Cadillac STS and help provide years of worry-free driving pleasure.


They are available for the following Cadillac STS years: 2008, 2007, 2006, 2005, 08, 07, 06, 05. This part is also sometimes called Cadillac STS Exhaust Converters. We stock catalytic converter parts for most Cadillac models including CTS, DeVille, SRX, Escalade, Seville, Eldorado, DTS, Fleetwood, Escalade ESV, Allante, Catera, Brougham, Commercial Chassis and Cimarron.

We stock these Catalytic Converter brands for the Cadillac STS: Eastern Catalytic, Bosal, Walker, Magnaflow and DEC.


Catalytic Converter for Cadillac STS - Partsgeek
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Review Fitment Notes to Ensure Proper Fit

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(1 Reviews)
5 Stars
Eastern Catalytic 50443
Catalytic Converter
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Our List Price: $240.33
(9) In Stock
Product SKU: 50443
Product Note: DIRECT FIT -- Undercar Left; Legal Note: Not For Sale or Use in the state of CA & NY (vehicles with CA Emissions)
Position of Product: Left
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Eastern Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2005 (05) Cadillac STS 3.6L V6 


Click to Enlarge
(Read reviews)
Our List Price: $233.33
(11) In Stock
Product SKU: 50444
Product Note: DIRECT FIT -- Undercar Right; Legal Note: Not For Sale or Use in the state of CA & NY (vehicles with CA Emissions)
Position of Product: Right
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Eastern Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2006 (06) Cadillac STS 3.6L V6 


Click to Enlarge
(1 Reviews)
5 Stars
Eastern Catalytic 50443
Catalytic Converter
Close
Loading Reviews...
Our List Price: $240.33
(9) In Stock
Product SKU: 50443
Product Note: DIRECT FIT -- Undercar Left; Legal Note: Not For Sale or Use in the state of CA & NY (vehicles with CA Emissions)
Position of Product: Left
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Eastern Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2006 (06) Cadillac STS 3.6L V6 


Click to Enlarge
(Read reviews)
Our List Price: $233.33
(11) In Stock
Product SKU: 50444
Product Note: DIRECT FIT -- Undercar Right; Legal Note: Not For Sale or Use in the state of CA & NY (vehicles with CA Emissions)
Position of Product: Right
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Eastern Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2005 (05) Cadillac STS 3.6L V6 


Click to Enlarge
(Read reviews)
Our List Price: $214.33
(33) In Stock
Product SKU: 079-5237
Product Note: Catalytic Converter -- Direct Fit; Not legal for sale in California. Not legal in NY for vehicles with California Emissions.
Position of Product: Right
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 25,000 Mile Bosal Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2005 (05) Cadillac STS 3.6L V6 Naturally Aspirated 


Click to Enlarge
(1 Reviews)
5 Stars
Bosal 079-5238
Catalytic Converter
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Loading Reviews...
Our List Price: $212.33
(>35) In Stock
Product SKU: 079-5238
Product Note: Catalytic Converter -- Direct Fit; Not legal for sale in California. Not legal in NY for vehicles with California Emissions.
Position of Product: Left
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 25,000 Mile Bosal Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2005 (05) Cadillac STS 3.6L V6 Naturally Aspirated 


Click to Enlarge
(Read reviews)
Our List Price: $233.33
(11) In Stock
Product SKU: 50444
Product Note: DIRECT FIT -- Undercar Right; Legal Note: Not For Sale or Use in the state of CA & NY (vehicles with CA Emissions)
Position of Product: Right
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Eastern Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2007 (07) Cadillac STS 3.6L V6 


Click to Enlarge
(1 Reviews)
5 Stars
Eastern Catalytic 50443
Catalytic Converter
Close
Loading Reviews...
Our List Price: $240.33
(9) In Stock
Product SKU: 50443
Product Note: DIRECT FIT -- Undercar Left; Legal Note: Not For Sale or Use in the state of CA & NY (vehicles with CA Emissions)
Position of Product: Left
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Eastern Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2007 (07) Cadillac STS 3.6L V6 


Click to Enlarge
(Read reviews)
Our List Price: $242.33
(2) In Stock
Product SKU: 16685
Product Note: EPA Ultra Direct Fit Converter -- Fits Fed. & Calif. Emissions Models.; Not legal for sale in the state of California. Not legal for use on California emission vehicles in New York. Legal for use on Federal/EPA emission vehicles in New York.; Additional Parts Needed:31534, 31379
Position of Product: Left
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Walker Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2008 (08) Cadillac STS 3.6L V6 


Click to Enlarge
(Read reviews)
Our List Price: $242.33
(4) In Stock
Product SKU: 16684
Product Note: EPA Ultra Direct Fit Converter -- Fits Fed. & Calif. Emissions Models.; Not legal for sale in the state of California. Not legal for use on California emission vehicles in New York. Legal for use on Federal/EPA emission vehicles in New York.; Additional Parts Needed:31534, 31379
Position of Product: Right
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Walker Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2008 (08) Cadillac STS 3.6L V6 


Click to Enlarge
(Read reviews)
Our List Price: $122.43
(3) In Stock
Product SKU: 51204
Product Note: Universal OEM GRADE Federal (Exc.CA) -- Cutting and welding required during installation
Position of Product: Right
Inventory: In Stock
Condition: New

Shipping Options:
Ground

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2006 (06) Cadillac STS 3.6L V6 


Click to Enlarge
(Read reviews)
Our List Price: $214.33
(33) In Stock
Product SKU: 079-5237
Product Note: Catalytic Converter -- Direct Fit; Not legal for sale in California. Not legal in NY for vehicles with California Emissions.
Position of Product: Right
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 25,000 Mile Bosal Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2007 (07) Cadillac STS 3.6L V6 Naturally Aspirated 


Click to Enlarge
(1 Reviews)
5 Stars
Bosal 079-5238
Catalytic Converter
Close
Loading Reviews...
Our List Price: $212.33
(>35) In Stock
Product SKU: 079-5238
Product Note: Catalytic Converter -- Direct Fit; Not legal for sale in California. Not legal in NY for vehicles with California Emissions.
Position of Product: Left
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 25,000 Mile Bosal Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2006 (06) Cadillac STS 3.6L V6 Naturally Aspirated 


Click to Enlarge
(1 Reviews)
5 Stars
Bosal 079-5238
Catalytic Converter
Close
Loading Reviews...
Our List Price: $212.33
(>35) In Stock
Product SKU: 079-5238
Product Note: Catalytic Converter -- Direct Fit; Not legal for sale in California. Not legal in NY for vehicles with California Emissions.
Position of Product: Left
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 25,000 Mile Bosal Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2007 (07) Cadillac STS 3.6L V6 Naturally Aspirated 


Click to Enlarge
(3 Reviews)
5 Stars
Walker 93252
Catalytic Converter
Close
Loading Reviews...
Our List Price: $96.33
(>35) In Stock
Product SKU: 93252
Product Note: EPA Ultra Universal Converter -- Fits Fed. & Calif. Emissions Models.; Not legal for sale in the state of California. Not legal for use on California emission vehicles in New York. Legal for use on Federal/EPA emission vehicles in New York.; Modifications and/or additional parts required.
Position of Product: Right
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Walker Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: B
Vehicle Engine
2005 (05) Cadillac STS 4.6L V8 


Click to Enlarge
(Read reviews)
Product List Price:
$736.24
Our List Price: $402.48
with FREE Shipping
(16) In Stock
Product SKU: W0133-1952667
Product Note: EPA Compliant - (48-State & Canada) EPA Tier 0 & Tier 1 emission use.
Detailed Note: Not legal for sale or use in California and New York
Position of Product: Left
Inventory: In Stock
Condition: New

Shipping Options:
Free Ground Shipping or (Overnight and 2-Day Shipping)

5 Year / 50,000 Mile DEC Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: A
Vehicle Engine
2007 (07) Cadillac STS 3.6L V6 


Click to Enlarge
(Read reviews)
Our List Price: $164.98
(7) In Stock
Product SKU: 82815
Product Note: CalCat Universal Converter -- Engine Family # BGMXV03.6053; Legal for use in the states of California and New York.; Modifications and/or additional parts required.
Position of Product: Right
Inventory: In Stock
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Walker Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: H
Vehicle Engine
2011 (11) Cadillac STS 3.6L V6 


Click to Enlarge
(3 Reviews)
5 Stars
Walker 93252
Catalytic Converter
Close
Loading Reviews...
Our List Price: $90.98

Product SKU: 93252
Product Note: EPA Ultra Universal Converter -- Fits Fed. & Calif. Emissions Models.; Not legal for sale in the state of California. Not legal for use on California emission vehicles in New York. Legal for use on Federal/EPA emission vehicles in New York.; Modifications and/or additional parts required.
Position of Product: Left
Condition: New

Shipping Options:
Ground

5 Year / 50,000 Mile Walker Limited Warranty

{We currently do not ship this catalytic converter to California or New York}
Additional Fitment Information: Catalog: C
Vehicle Engine
2005 (05) Cadillac STS 4.6L V8 


Related Top Sellers

Research on Catalytic Converter for Cadillac STS

If the catalytic converter is failing, cracked, or leaking, it won't only cause trouble with your emissions. Although it's designed to clean exhaust gases, the cat will trigger all sorts of problems if it goes bad. This is an emissions part owners usually hope is not problematic because of its cost. There's usually no choice but to replace a faulty catalytic converter. You can repair your Cadillac STS at a lower price by selecting a part from an online supplier.

When to Replace the Catalytic Converter

If there is a faulty catalytic converter, you will notice a few symptoms. A failing cat can affect engine performance because exhaust flow can be restricted (if there's a clog) or a leak in the case it's cracked. Power, acceleration, and fuel economy can be adversely affected, so the performance of your vehicle can tell you that the catalytic converter needs to be checked. You may also hear a rattling noise if there is damage to the cat's internal parts, such as collapsed or broken honeycombs. The Check Engine light can also alert you to an issue with the 2005 Cadillac STS catalytic converter before it has more effects on your car, if the compute detects the part is not operating the way it should.

How a Catalytic Converter Works

The cat provides emissions control by converting toxic gases and other polluting elements into substances that are safe for the environment. An oxidation and reduction reaction is catalyzed as exhaust passes through a ceramic monolith built into a honeycomb structure inside the device. The catalytic materials are dispersed over a larger surface area by a washcoat, and consist of palladium, platinum, and rhodium. The location of the 2005 Cadillac STS V6 catalytic converter, for example, is behind the exhaust manifold where temperatures are hot enough for the reaction to occur and the air/fuel mixture can be accurately monitored.

How Do You Replace a Catalytic Converter?

Replacing a cat is a highly-specialized job. The car needs to be level and raised on a jack. It must be cool. When you locate the catalytic converter, you can see if it is attached or damaged. The O2 sensor needs to be removed first. Rusted or corroded bolts can be loosened with penetrating oil and then removed. Welded in converters must be cut out. Instructions, tools, and expertise are needed to install the new part, which is why you are better off with a professional mechanic doing the work.

How Much Is a Catalytic Converter?

Despite there not being a 2006 Cadillac STA catalytic converter recall, you may still experience problems. A bad 2006 Cadillac STS V6 catalytic converter can be replaced for $511 to $985. Parts represent the greatest proportion of the bill, at up to $800. PartsGeek.com can offer an opportunity to save over a brick and mortar store, because our products are sold exclusively online and our overhead is low. The same savings is passed on to customers like you. Resolving a catalytic converter problem is therefore a repair you can afford.


Some of our Customer Reviews
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Reviewer: Lackman

Great products and services beat and store thanks.

2005 Cadillac STS Catalytic Converter


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