I am looking at buying rims from a 2010 accord and putting them on a 2021 accord (SE). The bolt patterns match. Would those older rims fit with respect to the brake calipers? Would there be odd behaviour like vibration from using those rims (which are in good condition)?. The local dealership was not able to answer this question. Any help would be greatly appreciated!

 

The bolt pattern, rim width, rim diameter, and the off-set of the bolt holes will dictate if they are an exact/close match.

I'd start by looking at the tire size for your 21 accord and the 2010 donor accord to find the rim diameter and the overall circumference of both rim + tires.

As a rule of thumb, I'd say that you can only decrease the rim diameter by 1 inch.

Option B is to stop by a u-pull-it junkyard or any junkyard that has a 2010 accord. Ask if they'd let you can try a 2010 rim on your car to see if it fits.