2002 2003 2004 2005 2006 Nissan Altima 2.5 Manifold Catalytic Converter for Sale

Price: $249

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Fits the following vehicles:


· models: 2002, 2003, 2004, 2005, 2006

· all models with 4 cylinders, 2.5 liter engine

· all models: Base, SL, S

This product set is the best aftermarket value and performance, direct fit, replacement for the catalytic converter and oxygen sensors that were originally installed in your car.

The catalytic converter is factory equipped with a high performance perforated stainless steel heat shield to provide adequate converter cooling (*). The perforated, stainless steel heat shield fully replaces inefficient back heat shield of the original converter.

All stainless steel construction, with brackets for the original front manifold heat shield.

Full hardware installation kit included ($60 value):

· OEM quality, stainless steel, manifold gasket (1)

· converter exit pipe sealing ring / gasket (1)

· threaded studs (2, welded-in)

· tension springs (2)

· self locking nuts (7)

Our catalytic converters are all designed for a simple and quick installation. They are guaranteed to fit the engine manifold and components of the exhaust system without welding, modifications or adjustments.

All our catalytic converters are robotically assembled and welded.

All our catalytic converters undergo gass pressure tests for converter shell integrity and weld leaks.

The high quality, long life ceramic catalytic block complies with EPA guidelines and specifications.

The converter body fully complies with the Federal EPA warranty durability requirements for aftermarket catalytic converters. The manufacturer warrants the external converter shell, including the end pipes for five (5) years or 50,000 miles (whichever comes first) from the date of installation.A warranty application card must be returned to the converter manufacturer and include the vehicle owner's name and address, phone number, the make, model, year and mileage of the vehicle, the date of installation, the installing dealer's name and address and the part number(s) installed.

It is highly recommended to replace Oxygen Sensors at least every 100,000 milesas well aswhen installing a new catalytic converter.

A worn-out oxygen sensor:

· Wastes precious fuel

· Will cause engine performance problems, such as surging and hesitating

· Is the number one cause of excessive exhaust emissions

· Considerably accelerates catalytic converter damage

Replacing a worn-out oxygen sensor:

· Saves money in fuel costs

· Improves engine performance

· Reduces air pollution

· Prevents premature failure of the catalytic converter

Oxygen sensor may fail due to a normal aging process. The oxygen sensors may also fail prematurely if they become contaminated with oil combustion products or traces of decomposing engine gaskets or engine sealants or the leaking engine coolant.

A defective sensor prevents the car's computer from adjusting air-fuel mixture properly, resulting in the air-fuel mixture becoming too rich. The final effect is incomplete fuel combustion, high fuel consumption and increased emissions. The unburned fuel may pass to the catalytic converter and ignite inside the converter. This will cause the converter to overheat. When the converter overheats the catalyst substrate inside the converter may melt or disintegrate forming a partial or complete blockage. The result will be a drastic drop in engine performance or engine stalling due to a buildup of backpressure in the exhaust system.

A malfunctioning oxygen sensor may cause severe damage to the catalytic converter. Too rich fuel mixture makes the catalytic converter to run much hotter than normal.

Please install new Oxygen Sensors when you install your new catalytic converter.

We currently offer high quality Oxygen Sensors for Nissan Altima models 2002 and 2003.

Please see our listing: Nissan Altima 2.5 (2002, 2003) Oxygen Sensor Kit

This product is not for California Emission vehicles.

This product is not legal to use in California.

This product cannot be shipped to address in California


Weship to Alaska, Hawaii. Please contact us for shipping rates.

We ship to Puerto Rico, US Virgin Islands.Please contact us for shipping rates.

No sales tax on shipment to USA.

Buyers from Canada will be charged GST / HST sales tax before the order is shipped. A separate sales tax invoice will be emailed to Canadian buyers and it must be paid before the order is shipped. Shipping in Canada by Fedex Ground. Canadian orders shipped from Canada. No cross-border fees !

Overnight delivery options are available. Please contact us for overnight shipping rates.

Always in stock. The same day, free shipping.


(*) - Insufficient Converter Cooling and poor design are the main reasons for the failure of the original catalytic converter installed in 2002-2006 Nissan Altima 2.5 models. Check "Technical Resources" section of our website for information about problems with the original Nissan Altima catalytic converters. You may still avoid a serious engine damage resulting from malfunction of the old converter. Our new converter may save you thousands of dollars in engine repair costs.

(**) - Oxygen Sensors may fail due to the normal aging process and it is recommended to replace them occasionally. The oxygen sensors may also fail prematurely if exposed to leaded gasoline, diesel fuel, combustion products from excessive oil consumption, internal engine coolant or decomposing engine gasket. Oxygen sensor may also be damaged road splash, salt, oil and dirt, mechanical stress or mishandling.

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