EDITORIAL GUIDES
Used Auto Parts Articles
Practical information for identifying and sourcing used replacement components.
GUIDE
How to Find an OEM Part Number on Your Vehicle or Auto Part
Learn where to look for an OEM part number, how to tell it from casting and serial numbers, and what to verify before sourcing a replacement.
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Used Engine Inspection Checklist: What to Check Before You Buy
Use this practical checklist to review a used engine's identity, visible condition, fluids, history and included components before buying.
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How to Identify a Transmission for a Replacement Match
Learn how to identify an automatic or manual transmission using the VIN, tags, case markings, drivetrain layout and physical details.
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How to Match Used Body Panels for the Right Fit
Learn how to match a used door, fender, hood or bumper by body style, production details, option codes, mounting points and included parts.
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How to Read Auto Glass Markings and Match Replacement Glass
Learn how to read windshield and car window markings, distinguish laminated from tempered glass, and document features for a replacement match.
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Radiator vs. A/C Condenser: How to Tell the Difference
Learn how a radiator and A/C condenser differ, where each is located, which connections identify it, and what to compare when sourcing a used replacement.
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How to Test an Alternator Before Replacing It
Learn basic alternator voltage tests, visual checks, and warning signs that can help separate a charging problem from a weak battery, loose belt, or poor connection.
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Used Wheel Fitment Measurements: A Practical Compatibility Guide
Learn how to compare wheel diameter, width, bolt pattern, offset, center bore, and clearance before choosing a used replacement wheel.
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CV Axle vs. CV Joint: What Is the Difference?
Learn how a CV axle, inner and outer CV joints, boots, and related parts work together, plus what to identify when matching a replacement.
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Headlight Assembly Fitment Guide: How to Match a Used Replacement
Learn how to match a used headlight assembly by side, housing, bulb technology, connectors, mounting points, features, and part numbers.
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