There is a difference between aftermarket and OEM supplier, when Toyota designs a vehicle or re-designed the 3rd gen 4R, Toyota engineered/designed the new parts needed if they could not reuse the parts from the previous Generation that had been proven to work through previous R&D, they went to 1 or more manufactures and had components built to Toyota specs in partnership with supplier and put them through tests to insure they would meet the manufactures requirements and QC, aftermarket companies built there parts using data from the original supplier and have no R&D, Toyota and the OE supplier has years of R&D and is using the best combination of metals, rubber, grease, hardware ect, for application. And what any non oem supplier is using is anyone's best guess. Now the problem exists where we don't know if we are buying repackaged Aisin, denso, NOK, Koyo, Sumitomo, mitsuboshi, Bando from who knows where unless we go to a Toyota dealer or known good vendor. I know I've had this in my cart for awhile but worried it might not be as advertised. I use my local dealer usually, got burnt a few times doing things twice going aftermarket, buy once cry once.

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