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Yes, but make sure you get an OEM type converter and not a universal converter.
That would depend on the type of vehicle. If it is a low emissions vehicle you have to go with the oem catalytic converter.
none as they are pattern copys
Cats cost around $150 for an aftermarket one. Not sure for dealer oem price
A OEM converter should bolt in exactly like the original, an after market may have to be cut and welded in.
Just ask any auto parts store for an OEM style converter.
It could be true, if the aftermarket converter is not as efficient as the OEM.
A factory catalytic convertor can be mounted to the exhaust manifolds and muffler pipe through hardware fittings. Original Equipment Manufacturer (OEM) catalytic converters will be a direct replacement and not requiring the cutting or welding of the exhaust system. In contrast, aftermarket "universal" catalytic convertors may have to be welded in or mechanically fastened on through screw-tensioned clamps.
You do not fix a defective Catalytic Converter, you replace it. A replacement converter will cost from $250 to $400 depending on brand and quality. OEM will be around $300. Labor costs are not included.
The aftermarket industry makes a converter that will suffice, However you CANNOT, I REPEAT CANNOT, reuse a converter of of a another vehicle that has been used. The EPA will fine you at the very least 5000 dollars for doing so. Get a hold of Catco, or goelrich (not sure about the spelling on that one) and they should have a suitable replacement that will pass emissions testing, and not get you into trouble with the EPA.
Yes unless the car came from the factory without it (post 1972 vehicles almost ALWAYS had one OEM)
I'd like to expand on your question concerning the catalytic converter on your 2002 Tacoma. Not to be argumentative with the person who responded and he is partially correct. OEM does mean original equipment manufacturer, but there are aftermarket cats that are OE type. There is nothing wrong with OE type aftermarket products, we buy them every day. Oil Filters, Brake Pads and Shoes, Front End Parts, Exhaust Systems, Batteries and so on. There are quality aftermarket catalytic converter manufacturers here in the US that make bolt on direct fit units to fit your vehicle. In addition there is really no such thing as a high flowing catalytic converter and the so called test pipe bit the dust some 12 years ago. In most states it is strictly against the law to tamper with a vehicles emission system and with 1996 and above OBDII systems you'd be crazy to even attempt it. Besides voiding any existing warranty on the vehicle you run the absolute certainty of the on board computer lighting up like a slot machine. Anyway to answer your question more completely check out the link below. http://www.discountconverter.com/catalytic_converters_news/news_page.cfm?Key=catalytic_converter-&News=2