Dealer has advised replacing one of these under warranty as a cure for a knocking noise on uneven roads, should these not really be replaced in pairs? I was thinking of having both sides done even if I have to pay for 1 side. Currently on 36,000 miles
Advice welcome, thanks. MY19 SDV8 Autobiography

2007 Defender 90 XS (Gone)
2014 Discovery HSE Lux (Gone)
2011 Discovery HSE (Gone)

They're not critical enough to need replacing in pairs as they don't have any effect on alignment or ride height; but in practice I always do both on my cars as they're cheap and easy to replace and if one's gone the other's normally not far behind. 2012 (L322) 4.4TDV8 Vogue SE, RSE, Fuji White over Arabica.
Previous V8s: BMW 645Ci, P38 4.6, P38 4.0, Merc CL500
Previous others: Honda x1, Volvo x7, Rover x6, BMW x6, Ford x1, Mercedes x2, Skoda x3, VW x2, Renault x2, Citroen x1, Mazda x3, Nissan x1, Audi x3, Kia x1, Fiat x4, Subaru x3, Austin x2, Triumph x2, Jeep x2, Hyundai x2, Lexus x1, Mitsubishi x1, Saab x2... and some others I've forgotten!

Thanks, that was pretty much my thinking that I'd be back soon having the other side done. MY19 SDV8 Autobiography

2007 Defender 90 XS (Gone)
2014 Discovery HSE Lux (Gone)
2011 Discovery HSE (Gone)

I suggest replacing the sway bar bushings at the same time. The bushings are likely most of the issue. Replace both in pairs.

I replaced my end links and it helped. Replacing the bushings cured the problem. Dan. 🇨🇦 2013 L405 5.0 SCV8

Thanks Bora that was my initial feel too but seeing as it's warranty work they have to get approval at every stage and this is all that's got the green light, if I was paying my independent I'd just do the whole lot. MY19 SDV8 Autobiography

2007 Defender 90 XS (Gone)
2014 Discovery HSE Lux (Gone)
2011 Discovery HSE (Gone)