Lexus LS 2023–2024 — technical service bulletin
Bulletin L-SB-0035-22 Rev1 · NHTSA communication 11003622 · issued Apr 11, 2024
Technical service bulletin
communication type
Electrical System
component
2023–2024
model years
17
vehicle entries
Official summary
When certain vehicle ECUs are replaced, the ECU Security Key must be written in order for that ECU to communicate on the vehicle network. The GTS+ Software Health Check Results screen has been enhanced to help identify if a replacement ECU requires an ECU Security Key. REVISION NOTICE April 11, 2024 Rev1: •Applicability has been updated to include 2023 – 2024 model year LS 500, LS 500h, LX 600, NX 250, NX 350, NX 350h, NX 450h+, RX 350, RX 350h, RX 450h+, RX 500h, and RZ 450e and 2024 model year RZ 300e, TX 350, TX 500h, and TX 550h+ vehicles. •The entire bulletin has been updated to represent
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.