Cross-aggregated views of the indexed genuine parts catalogs — a different angle on parts commonality than the model or part pages.

Rankings

• Commonality Ranking Fasteners (bolts, nuts, clips, washers) dominate the top of the list, so they are excluded by default.

Model-code pairs

• Most shared part numbers Different models from the same manufacturer that still share many genuine part numbers — a good starting point for interchange.
• Shared across manufacturers Different manufacturers that share parts, revealing OEM supply deals and sibling models.
• Nearly identical parts lists Ranked by how much the two parts lists overlap. These likely share a platform.
• Same model, different code Different model codes of the same model — shows how much is shared across years and grades.

Overall trends

• Model-specific parts ratio Share of part numbers used only on this model code. A higher figure means more bespoke parts and generally harder sourcing.
• Donor-car suitability How many part numbers are shared with other model codes. A high figure means one car can supply parts for many others.
• Parts commonization by manufacturer Share of part numbers shared with other model codes, across all indexed models per manufacturer.
• Commonization trend by decade Share of shared part numbers aggregated by the decade of the model year.