You can find a factory OEM part by either going through a dealer. Factory parts are built by the OEM manufacturer to the exact same specifications as the existing parts. New OEM components are generally the most expensive option but often yield the best fit, durability and overall quality. If you own your vehicle and are thinking of reselling, documenting repairs using factory parts can increase the resale value of the vehicle.
To determine the best method of replacing a part, check with you dealer, owners of similar vehicles and on the Internet to determine what option makes sense. You know the new OEM part will work, so read online testimonials to see if aftermarket replacements are worth the cost. You can also gain insight that's helpful in a used search, learning the common defects/attributes of a part before buying it yourself.
Many suppliers offer both OEM and aftermarket parts for a broad range of vehicles. Some specialty parts may not be produced in the aftermarket if demand does not warrant investment. Tracking down these obscure pieces may require consulting a parts specialist. Some dealers have caches of unused factory parts, often called New Old Stock (NOS) or New Old Replacement Stock (NORS). These command high prices especially when out of production.
Like replacement parts, some add-on accessories are factory authorized while others are produced in the aftermarket. Depending on the popularity of a vehicle, a variety of special components exist to modify it. Engine enhancements, body kits, interior pieces, electronics, exhaust systems, wheels and tires are among the many elements that contribute to customization.
