Clusters can be repaired, but with some downtime. I may do this at some point in the future when the rig is off the road for awhile.
www.automotivecircuitsolutions.com
Most tire shops can scan all of the sensors via a wireless TPMS tool. When I got 285s a few months ago I had my local tires shop do that as my light was never turning off despite proper inflation. Four out of my five sensors were either non-responsive or had low/dead batteries. I had them replace all four, which was not cheap. I like the TPMS for towing when tire pressure is critical. Bonus is that the new valve stems are much easier to remove when airing down with my Chinese knockoff ARB deflater.

2003-2009 Lexus GX470 Instrument Gauge Cluster Repair
If your Lexus GX470 instrument cluster has faulty gauges, bad backlighting or dim or blank display you may be in need of a repair for your gauge cluster, we have repaired hundreds of these with these issue. Send your cluster to us for a repair. Fits: 2003 2004 2005 2006 2007 Lexus GX470

Most tire shops can scan all of the sensors via a wireless TPMS tool. When I got 285s a few months ago I had my local tires shop do that as my light was never turning off despite proper inflation. Four out of my five sensors were either non-responsive or had low/dead batteries. I had them replace all four, which was not cheap. I like the TPMS for towing when tire pressure is critical. Bonus is that the new valve stems are much easier to remove when airing down with my Chinese knockoff ARB deflater.