2025 LEXUS LS Seats Problems

My 2025 Lexus LS500, with only 500 miles, has two serious defects in the front passenger seat, creating a safety hazard. The massage function is non-functional, grayed out in the infotainment system, and the seat belt fails to tighten or retract, leaving significant slack when buckled. Issues appeared during normal city driving (dry conditions, <10 mph, no accidents or modifications). The seat belt, when pulled and buckled, remains loose with several inches of slack, failing to secure an occupant. This was tested 5+ times, stationary and moving. The massage feature (part of the 28-way adjustable seat package) is grayed out, indicating a system fault, likely in the seat’s control module or air bladders. No warning lights (e.g., SRS) are on, and no diagnostic codes are retrieved yet. The loose belt poses a severe risk in a collision, as it cannot restrain the occupant, increasing chances of ejection or injury (e.g.,...