Hello everyone,
I recently purchased a fully-optioned 2018 LS500 in White Pearl with Chestnut interior, with 62,000 kms. Overall, I am extremely impressed with the vehicle’s refinement, build quality, and drivetrain. My only reservation relates to ride comfort over uneven and coarse road surfaces,
an area where the pre-facelift LS500 is known to be somewhat firmer than previous LS generations.
As part of my investigation, I connected Techstream to review the air suspension parameters and noted that the rear-left (RL) height control sensor was reporting a value approximately 18 mm different to the other three corners.
Following the standard mechanical adjustment procedure in a video I found on these forums for the LS460, I adjusted the RL sensor linkage and successfully reduced the variance to approximately 5 mm relative to the other corners. However, after the adjustment, I have observed that the RL sensor body and linkage now sit visibly higher than the rear-right (RR) sensor, despite Techstream now reporting only a ~5 mm variance.
I would appreciate any insight from members who have encountered similar sensor offset behaviour, particularly in relation to whether the visual asymmetry is expected once electrical values are normalised, or whether further mechanical realignment is recommended prior to performing a zero-point calibration.
Thank you in advance for your guidance.

 

I think I see your problem. "Following the standard mechanical adjustment procedure in a video I found on these forums for the LS460"

You followed the procedure for the LS460. You own an LS500. The two are different.

It's more likely that you have a bad sensor, as well as limited knowledge how to diagnose and repair your car. Take it to a specialist.

 

How was the left rear corner sitting compared to the other 3 before you adjusted the link? With a used car I would be more concerned about how the car is sitting than I would be about what the numbers are telling me...to a point.
The rear adjustment is simple but if you raise one side it will lower the other and vice versa, for example sometimes if one side is lower it's better to lower the high side than raise the low side and use small adjustments till you get what you want. You also need to cycle height high a few times between adjustments. It's also best to check for any damage to the sensor itself and linkage before adjusting.
Your concern about rough riding might be due to air shocks or suspension bushing wear so that could be contributing to or causing the difference in the techstream numbers as well.