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January 23, 2025 Service bulletin

When certain vehicle ECUs are replaced, the ECU Security Key must be written in order for that ECU to...

Lexus technical service bulletin L-SB-0035-22 Rev2 for 2023-2025 Lexus RX, 2023-2025 Lexus RX Hybrid and 2023-2025 Lexus NX and others.

Bulletin number
L-SB-0035-22 Rev2 (L-SB-0035-22 Rev2)
Component
Electrical system
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.

Owners of these vehicles have filed 89 complaints in the electrical category.

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