Exploring the World of Rebuilt, Remanufactured, and Used Auto Parts

Car repairs are always unpleasant. Even minor parts that need to be replaced are an inconvenience because they siphon away your limited time. When your fuel filter, catalytic converter, or alternator fail, the experience becomes far less pleasant. Not only do those components cost more, but the labor involved in replacing them can add hundreds of dollars to the final bill. This is the reason mechanics will often ask whether you would like the failing components replaced with rebuilt, remanufactured, or used auto parts.

There are pros and cons to each. Below, I’ll explain what each option offers and their respective drawbacks. I’ll then explain why OEM (Original Equipment Manufacturer) certified parts are usually the best choice.

What Does “Rebuilt” Mean?

Parts that are rebuilt are a combination of original pieces and those that have been used to replace failing pieces. For example, suppose your alternator shows signs of failing. It is actually made up of multiple individual pieces, including several terminals, a voltage regulator, and a diode rectifier. A failure might be due to a single piece. If that’s the case, you can have the mechanic simply replace the individual piece that failed to get your car back on the road.

Sometimes, mechanics will use a core. This happens when the failing component from your vehicle is worn to the point that  used auto parts  it cannot be rebuilt. The core is taken from another car and the bad pieces are replaced.

One of the drawbacks to rebuilt car parts is that the replacement pieces will be new while the rest of the component will have experienced some wear and tear. The disparity can potentially introduce heat stress and other problems. Moreover, the original alternator (in our example) may still fail in the near future.

Buying Used And Taking Your Chances

A lot of consumers choose used auto parts because they’re less expensive than rebuilts and remans (which we’ll explore in the following section). These components usually come from salvage yards. The advantage is price. Depending on the piece you’re buying, you can expect to save up to 50% from the retail price of a new equivalent.

The downside is that you can never be certain regarding the quality or durability of the piece you’re buying. Depending on the upkeep of the yard, moisture and rust may have caused hidden damage. If you’re only buying a knob for your car stereo or gearshift, there’s very little risk. On the other hand, buying a used alternator is a bad idea – even if it comes with a limited warranty.

Used car parts have their place, especially if you’re purchasing simple pieces. For complex components, stick to rebuilts and OEM-certified remans.


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