Difference between OEM dashcam part numbers

I recently purchased an OEM dashcam, not looking for reviews or opinions on other cameras as I've done my research already and made my decision. I am wondering what the difference is in the 3 different part numbers. I purchased PT949-34222 but there are 2 other part numbers that come up which are PT949-34221and PT949-34220. Does anyone know what changed on the previous 2 part numbers? From what I gathered the dashcams are the same for the tundra, sequoia, and land cruiser.

 

I don't know the difference but all 3 of those part numbers are on the OEM instruction sheet.
I'm not sure what a 'legacy' part number is?

Accessory Installation Instruction Template - 2004 (sparkstoyota.com)



Good luck..

 

Funny thing is that's where I saw the part numbers to ask this question lol.

 

Probably no difference at all.
Toyota is notorious for changing part numbers..
When you search Sparks for PT949-34221, it pulls up PT949-34222.





When you search it for PT949-34220, it pulls up just the camera without the harness.
Tun Camera Unit PT949-34220-AA | Sparks Parts

 

Typically, a legacy part number is one that been superseded. Small changes can cause this, anywhere from a different subcontractor or a different lot of components used to build the camera.
Daisy