About
Four chains run roughly 22,900 US auto-parts stores. They sell the same starter, alternator, battery, and brake pads to millions of drivers, under warranties printed in documents those drivers never see — the proration formula lives in a business-to-business PDF; the lookup system's limits were described by an employee on a garage forum; the database behind the receipt wall is mentioned only in §1.1 of a page whose boldest line demands the receipt. The companies can't publish the honest how-to for fighting their own counters. So we did.
Primary documents only. Every rule on this site traces to a chain's own published warranty document, read in full, with its source named on the page. Where a fact comes from reporting — the employee's lookup account, the complaint corpus — it's labeled reported, with its source and date.
Dates on everything. The dataset was checked Oct 20, 2026 and is re-verified quarterly, because the terms are era-stacked and the chains honor the sale-date terms. Changes are logged in public on the correction log.
Gaps stay gaps. When a cell can't be verified — NAPA's national number, O'Reilly's proration formula — the site prints the flag, not a plausible invention. A warranty site that invents one phone number will invent anything.
Honest grading. The checker says "weak" when a claim is weak — worn-out parts are excluded in every document we read, and no page on this site pretends otherwise. Likely rulings, never promised outcomes.
PartsWarrantyDecoded is an educational product of CLEARDEAL LLC, not affiliated with AutoZone, Advance Auto Parts, O'Reilly Auto Parts, or NAPA. Questions and corrections: help@doogex.com.