Start with the diagnosis.
A harsh shift does not automatically mean a failed ECU. Wiring, solenoids, hydraulic controls and internal transmission faults can produce similar behavior. Share fault codes, diagnostic results and the work already performed.
Our hard-shift ECU repair.
Our team developed this hard-shift ECU repair and tests repaired units. Send the exact ECU details and vehicle diagnostic findings so we can review whether the service fits the concern.
Supported Lexus applications.
Our focus includes LS430, IS250, IS350, GS350 and GS430 ECUs. Exact coverage depends on the vehicle year and module part number. Ask us about other Toyota and Lexus applications.
Describe the shift.
Tell us which upshifts or downshifts are affected, whether the car is cold or warm, and how consistently the problem appears. Include the ECU label and any history of water damage or previous repairs.
Can I mail in my Lexus ECU?
Yes, for supported applications, including international enquiries. Send the year and model, a clear ECU-label photo, symptoms, fault codes and diagnostic results. We review those details and confirm shipping instructions before you send the unit.
Service-specific warranty.
The published warranty for this ECU hard-shift repair is for the life of the vehicle. It excludes transmission hard-part faults and problems caused by lack of upkeep. Confirm the applicable written terms when arranging your repair.
Arrange your mail-in repair
Once the workshop confirms support, follow our module packing and repair intake guide. For examples of our board-level work, see the ECU repair case studies.
Your next step.
Send your vehicle details, symptoms and module part number. Our team will explain support, assessment and current arrangements before you commit to shipping or an appointment.