What do part grades A, B, and C mean?

Grade A parts are tested, low-mileage, and stock-condition from a clean donor. Grade B parts are functional but show wear or higher mileage and are sold as-is. Grade C parts are sold for repair, rebuild, or core exchange — no guarantee they work as-is.

Grading is set by the seller at listing time. Reputable yards measure mileage, run a basic function test (compression for engines, shift quality for transmissions), and inspect for damage before assigning a grade. BustnFound does not verify grades — buyers should confirm condition in person or by independent agent before paying.

Grade A typically means under 60,000 miles for engines or 80,000 for transmissions, no visible damage, and the part was pulled from a vehicle with a clean (non-flood, non-fire) donor history. Expect to pay 60–80% of new OEM price.

Grade B covers parts that work but have higher mileage, cosmetic wear, light surface corrosion, or were pulled from vehicles with minor secondary damage. Often 30–50% of new price. Most marketplace volume sits here.

Grade C is core-exchange or rebuild material. The part may turn over, the unit may be intact, but you should plan to send it to a rebuilder or use it for sub-component harvest. Typically 10–20% of new price.

Frequently asked

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