2010-13 RX 350s have a notorious dashboard top leather peeling/cracking issue, particularly in hot climates like Arizona and Texas. Lexus extended the warranty for this in some regions; many owners had dashes replaced free under TSB. Check Lexus dealer for warranty coverage before paying out of pocket.
Inspect the top of the dashboard near the windshield and HVAC vents in good light. Cracking, bubbling, peeling, or sticky tackiness = the known defect. Phoenix-area cars are especially affected.
Est. cost: $0-$2,500 (free under extended warranty / $1,500-$2,500 if out of warranty)
Source: Lexus TSB + Phoenix/Texas market pattern