Used auto parts are car components that have been previously utilized for a different vehicle or application. The failure of major car parts may lead to expensive repairs, and the installation of brand new or original equipment manufacturer (OEM) parts may cost significantly more than used parts. Anyone from the expert mechanic to the complete car novice can benefit from used auto parts.

Vendors sell a variety of parts for many different makes and models of cars online. As long as they are in good condition, reusable parts include:

Body panels, bumpers, carburetors, cigarette lighters, coolant reservoirs, cooling fan, fuel tank, grill, hub caps, power window motor, rear view mirrors, steering wheels, seats, stereo systems, windows, wiper arms, tires, rubber hoses, belts, radiators, oil filters, exhaust systems, engines and transmissions.

The cost of a used auto part will vary depending on what is needed. Those who are looking for a used transmission for a vintage car, for example, may spend a great deal more on the part than those needing a headlight or windshield wipers. 

Aftermarket parts tend to be cheaper since they have not passed compatibility tests for all makes and models. These are auto parts made for a variety of vehicles, however, and can work just as well as name brands.

Used OEM parts are manufactured by the vehicle manufacturer directly. This being the case, these parts will be pricier than aftermarket parts, but cheaper than buying brand new. When purchasing OEM parts, be sure to determine they are the correct parts for your specific vehicle before handing over the cash.

Junkyard parts are taken from clunkers, totaled vehicles, insurance write-offs, salvage cars and junk trucks. These used parts can vary greatly in age and condition, but you are nearly guaranteed to pay nothing over 50 percent below the price of a new part.

PartsHotlines.com and Car-Part.com allow you to perform live searches for used auto parts in your area. 

UNeedAPart.com boasts a network of millions with access to used car parts nationwide. 

No matter where you live, GetUsedParts.com will connect you with hundreds of vendors nationwide when you fill out a form about the part you need on their site.

JunkYardDog.com specializes in used auto parts that are collected from a database of over 5,000 used auto junk yards.

AutoPartsLocatingService.com promises to find you quality used auto parts through their network of 7,000 active junk yards, automotive recyclers and aftermarket dealers. You can also access them via phone at 1-800-918-3715.

For the lowest prices available, check out the Frugal Mechanic.