Yes. That's what I was referring to.You mean like what parts are made by what sub-suppliers?
FWIW, People will argue against this, but buying parts via the OEM suppliers (IE Denso instead of Toyota/Lexus, Aisin instead of Toyota/Lexus, etc...) is not getting you the exact same part at the same quality level as the genuine stuff. It's close and the next best thing, but it is not identical. It may come from the same tooling specifications and it may share some quality standards, but for most parts the Toyota/Lexus component will have higher quality standards and verifications than the sub-supplier direct parts. I say this as someone that's received multiple DOA sub-supplier parts and felt the sting of wasted labor over the last 10-15 years. I'm also a manufacturing engineer that's worked for multiple corporations that use a similar sub-supplier/rebranded relationship. Sometimes (but rarely) items are just reboxed. In my experience more often, they are not. There's more to it. Quality standards are altered. 4 thou +/- is loosened to 10 thou +/-, etc... Acceptance criteria is widened or restricted. Lot tracking is held to higher standards. ISO 9000 standards are taken more seriously. On and on and on. Manufacturing, particularly extremely high reliability items like most auto parts, can be done a hundred different ways even if you're using the same tooling to do the job. Maintaining Toyota manufacturing standards is very difficult. So difficult, Toyota's mindset on quality control is an entire educational topic of its own. The Denso parts that are so reliable in Toyota vehicles are not as good as they are because Denso wants to make good parts. The Denso parts are so reliable and consistent because Toyota demands it. That does not apply to the aftermarket parts sold from Denso/Aisin/etc..., but it does apply to the parts that end up being "genuine" Toyota/Lexus.
Didn't mean for that to turn into a large paragraph, but there ya go.
I'm not a manufacturing expert and I know not all the parts are equal, but was wondering if there are certain parts that meet the quality criteria.
Some of the parts mentioned here look like they are made for Toyota, just re-boxed in the manufacturer's box.
Perhaps I misunderstood.
This is an excellent explanation. Thank you.