I purchased this from ebay about 3 years ago for £29.99 but never installed it as the car failed its MOT badly.

The paperwork which came with it says it will fit S Type Models 1999-2001 only VIN Range L99999, M00001 through to M45254

Part Number XR853606

Compatible part numbers

XW4F-18C830 -AK

XW4F-18C830 -AL

XW4F-18C830 AK

XW4F-18C830 AL

Cartridge is NOT included