Product Overview The Front Left Lower Rearward Control Arm LR078478 is a Genuine OE-grade suspension component engineered for the for Land Rover Range Rover (L405) from 2013 onwards. Also known as a wishbone or lower rear control arm, this left-hand arm connects the front wheel hub carrier to the vehicle subframe, controlling wheel geometry while absorbing lateral and longitudinal loads generated through suspension travel and cornering. LR034218 is the original part number;