The warranty is based on a label at the bottom of the seat. If yours still has it you should be able to get warranty, using a serial number that's on the label.

The warranty is based on a label at the bottom of the seat. If yours still has it you should be able to get warranty, using a serial number that's on the label. Source: previously owned a used aeron. currently have an embody. Never had to use the warranty, but looked up this info when purchasing a previously owned chair.