Every fitment number on this site earns its place the same way. This page documents that process, because a parts site that cannot show its work is just another listing scraper.
Four catalogs, cross checked
The backbone is four independent printed application catalogs from major bearing manufacturers: a 2,377 row chassis catalog, a 1990 onward bearing and seal application catalog, a full line bearing and seal reference, and a wheel hub assembly, bearing and seal catalog. Each vehicle page has its numbers checked across at least two of the four before publication.
Coverage does not run to the present day. The newest of the four catalogs reaches model year 2020, and its wheel hub chapters thin out well before that: broad through 2018, partial at 2019, sparse at 2020. Many models stop earlier still.
Where a vehicle sits past that horizon, the page says so rather than guessing. Some newer numbers are verified instead by confirming the same number across multiple independent retail listings, and the page states plainly when that is the source.
Disagreements get recorded, not averaged
Sometimes the sources conflict: an index contradicts its own application pages, two catalogs assign different numbers to one fitment, or left and right get swapped between lists. When that happens we publish the disagreement and tell you how to settle it for your vehicle, usually by VIN or by matching the old part. Several pages on this site exist partly to document exactly such conflicts.
The traps are the point
Mid-year design changes, ABS splits, stud counts, handed left and right parts, trim-specific hubs, sensor clip types, build-country differences: these details are where wrong orders come from, and finding them is most of our research time. If a vehicle has a trap, its page leads with it.
What we refuse to do
We do not guess numbers for vehicles our sources cannot verify, we do not present a single number where the truth splits, and we do not claim hands-on testing we have not done. Where data does not exist, the page says so and gives you the mechanism to find your answer instead.
Corrections
If a number here disagrees with what came off your vehicle, we want to know. Reach us through the contact page with the vehicle, the number, and ideally a photo of the old part’s markings, and we will chase it against the sources.