For those of us with hydraulic anti roll bars (Dynamic Response), according to the service schedule, the reservoir is required to be replaced every 5 years or 80k miles. This is because it contains an integral filter.

From a dealer, this part is around the £95 mark.

Someone is selling a few brand new, genuine LR ones for £25.99

https://www.ebay.co.uk/itm/NEW-Expansion-C...3716435830

Only one left! Grab yourself a bargain  Kev

2014 L405 RR Vogue SE 4.4 SDV8 in Corris Grey
2010 L320 RRS HSE 3.0 TDV6 in Stornoway Grey