What year S-type or possibly X-type seats will fit my 2001 S V8?

 

Probably only S-Type 99-02 (before VIN M45255) but beware of power/heat/etc options

 

Check your local Craigslist postings. There should be plenty of donor S-Types, same generation, maybe exact year as yours. +1 on the options. In the south, heated seats are uncommon. Engine type should not matter.

Good luck.