My brother's 1st gen Vios is having an unsolved issue since 2 years ago. Went to so many workshops, non of the mechanics can rectify the problem. The car will vibrate a little every time you accelerate the car from parking. You can feel the vibration at the front passenger side once the car reaching ~40kmh and stop vibrating once it's moving over 60kmh.
Over the past 2 years he changed both lower arms, all tyres, both tie rods.
Any suggestions for this case?