Greetings and a Happy Friday from the US...
The ABS booster on my daily driver 2001 P38 has started running almost continuously. For example, at a stoplight with my foot on the brake it won't stop running until I take my foot off the brake. Otherwise I hear it about every 2nd brake push. Looking at the PO's receipt box the accumulator has about 90k (miles) on it so that's likely the cause but it could also be the switch.
I also have a 99 P38 that I need to dispose of finally so I'm thinking I could rebuild that one's ABS booster and swap it in to my 2001. On eBay I see a guy selling 'rebuilt' ABS boosters for $800 USD. https://www.ebay.com/itm/STC2783-RANGE-ROVER-P38-ABS-BOOSTER-PUMP-REBUILT-COMPLETE-UNIT-95-02/
This caught my eye and the reason why I'm asking: "PUMP IS REBUILT WITH NEW SEALS, RACES, PISTONS, SPRINGS ETC." I notice the accumulator he's using has a flat finish so it's definitely aftermarket.
Is that something I can do myself? Replacing with an OEM accumulator, pressure switch and the motor would run me about $400 USD.