About Precision Auto Picks

Used OEM automotive parts · inspected, bench-tested, part-number verified

Since 2002, Precision Auto Picks has supplied used OEM automotive parts to DIY owners, independent shops, and dealerships. Every part is selected, inspected, photographed, and packed by hand. Electronics are bench-tested against OEM reference values where testing is possible, and fitment is verified by part number — the part is identified precisely, the condition is stated plainly, and the photos are treated as part of the description. The operation is located near major US carrier hubs, which keeps transit times short across most of the country.

Track record: a Top Rated eBay seller with a 5-star feedback record. The full feedback history is public — read it here.

Who you're buying from

I’m William, and I run Precision Auto Picks as a one-person operation — I pull the parts, test them, photograph them, write the listings, and pack the boxes myself. I come at this from an automotive and engineering background, and that is really the whole difference: I am less interested in moving boxes than in understanding what a part is and proving it works.

The name is deliberate. I pull selectively and test what I sell, rather than stripping a vehicle and listing everything that comes off it. A used part is only worth what you can verify about it, so electronics are bench-tested against OEM reference values before they go up, and where it is honest to do so I record the test on video — you can watch the part work and read its numbers before deciding. I have spent enough time inside control modules, including programming them, to know that the number on the label, not the wording of a title, is what decides whether a part will fit and work.

That is the standard every listing is held to: identify the part precisely, test it where testing is possible, state the condition plainly, and give the buyer enough to make a confident decision before they ever click buy.

How every part is handled

The approach is hands-on and diagnostic. A used part is only as good as what can be verified about it, so the work is built around verification the buyer can check:

Identified by the numbers on the part, not by the listing title. Fitment clues, connectors, mounting style, options, color, and the stamped or printed part number all matter — and the part number on the label is what gets matched, because suffixes and revisions decide whether a part actually fits.
Electronics are bench-tested before they are listed. Modules are powered through their own connector with a current-limited supply — a healthy unit draws normal current, a failed one pulls maximum current immediately — and functional outputs are exercised and watched on a test lamp where the design allows. When a test result depends on a protection behavior built into the module, that behavior is explained rather than hidden.
Condition is stated plainly and photographed. Every part is photographed before it ships, and the photos are treated as part of the description, not decoration. What you see is the unit you receive.
Packed to arrive as photographed. Leather, finish surfaces, button mechanisms, and electrical connectors are protected in transit; parts ship from near major US carrier hubs to keep transit times short.

Why a reference site, not just listings

An eBay listing answers one question: is this specific part for sale right now. It disappears when the part sells. The questions that bring people here outlast any single listing — what a part number is, which vehicles it fits, why it fails, and what an honest test of it looks like. Those answers come from actually pulling, testing, and shipping the parts, year after year, and they belong somewhere permanent.

So the reference pages on this site carry the knowledge: identification by part number, fitment, common failure modes, and the real test procedure — written from hands-on bench work, with the matching part available in the eBay store when there is one in stock. The knowledge stays put; the inventory link rotates.

Questions before you buy

Questions before purchase are welcome through eBay messages. Send a VIN or a clear photo of the original part — especially the part-number label — and I will help compare before you spend anything. A replacement part is not a diagnostic step, and the goal is for the buyer to make a confident decision before clicking buy, with no guessing game on the other end.

Browse current inventory on eBay

Parts reference

Guides written from hands-on bench work:

Volvo Haldex Gen 4 DEM — 5WP33518-03 — fitment, P1889/P0961 failure modes, bench testing