This compressor is replaced by following KCid's

68796388 for seats produced after 2021-09-01

68796309 for seats produced before 2021-09-01

For 9000 and 7000 series you’ll find the product label with production date on the lefthand side of the seat underneath the bellows.

For 3000 series you’ll find the product label on the backhand side of the backrest, under the upholstery. One product label is applied on the scissor underneath the seat.