Driving home earlier this week I noticed the AFS light was flashing on the dashboard of my 2007 RX400h.
A little googling led me to suspect the linkage on the height sensor behind the rear right wheel.
Sure enought the lower ball joint on the linkage had seized and the linkage had snapped in the middle.
The linkage alone is not available from Lexus and the local Lexus dealer quoted over £400 to supply and fit the sensor, arm, and linkage (89407-48030) as a unit.
Toyota however do supply an identical linkage (48906-35020) for about £80 from a dealer or £40 from eBay.
Still pricey I know but I didn't fancy fabricating a linkage using Rapid Electronics Modelcraft Swivel head Ball Joints and the ball joints are sealed and the link is easily adjustable with the Toyota part. Two nuts to remove and replace and all is well.
Hope it helps someone in the future if you are looking for an equivalent replacement for the link.