Repair of 'e-CVT noise' issues on Toyota/Lexus Hybrid

Hybrid Toyota and Lexus vehicles equipped with an e-CVT transmission may sometimes develop a humming or whining noise during driving or acceleration. From our experience one of the most common causes is worn internal bearings inside the hybrid transmission. The e-CVT system uses a planetary gear set together with electric motors MG1 and MG2, and when these bearings begin to wear a constant humming sound can appear and often increases with vehicle speed. At FIX SERVICE in New York we regularly diagnose these types of hybrid system issues to accurately locate the source of the noise. Our technicians inspect internal bearings, the planetary gear mechanism, and the operation of MG1 and MG2 electric motors. After proper diagnostics we determine the exact cause of the problem and recommend the appropriate repair solution. In some cases the sound may originate from related hybrid drivetrain components rather than the transmission itself, which is why accurate diagnosis is essential.