Richard Lawn

Thanks Bob, but I have tried something similar. When I first saw warning light I read up on others experience and most problems seem to have been due to sensor in rear suspension - it picks up a lot of wet crud from the road here. So I bought a clone replacement, very similar if not the same as your recommendation and replaced it. No change, so looking at front sensor next, I could see it had received a knock and on removal found it seized. So having now got the old rear sensor which since no change, assumed to be OK and looks identical, I put it in place of the front one. But still error light (and no movement of headlights when switched on). Next two thoughts, are front and rear sensors identical (I found out from Lexus that they have different part numbers - though they would not tell me what these part nos are, but they do include the rods etc for mounting which could explain that)? Also when you mention clockwise and anti versions, does that mean if the wrong one is used the spindle would not rotate at all in the right direction when in position?

Having problem with headlight levelling system - namely warning lamp (Is this an MOT failure?) and front sensor at left front wheel arch seized. Anyone know of a clone replacement for SC, most on eBay, of which there are a lot, seem to exclude this one model? Reluctant to pay full Lexus spare price - this is after all just a simple carbon-track potentiometer.

Try one of these. Yes it's made of plastic so needs handling gently but it incorporates a bluetooth chip so needs no wires. Connects to your android phone via app called 'Torque' (get from Play Store). Follow instructions to link the two, then put in make and model of vehicle and power up device in ODB2 socket (ignition on) and hey presto translation of faults reads out. All sorts of parameters can be monitored (and vehicles) live too. All this for £7.99 !! The intelligence of the system is in the software which is free. https://www.ebay.co.uk/itm/Mini-OBD2-V2-1-Bluetooth-Car-Scanner-Android-Torque-Auto-Scan-Diagnostic-Tool-/164737761741?hash=item265b22c1cd