Change your tyres
To
Yokohama Advan DB V552 185/65 R15 available on Tyre point , Metro ,DHA Lahore
Or if
In Karachi from Sheikh Brothers.
Because Bridgestone Ecopia ep150
The OEM tyre on Ciaz is actually a very Hard and Noisy tyre.
Ecopia Produces a strong Humming Noise At 40-60km/hr speed .
And when i bought my ciaz brand new in 2017 i thought that its the noise of bearing but its actually the noise of tyres.
Which i changed as soon as i boight the car and the car becomes soft and noiseless.
Also never ever change the OEM steel wheels on Ciaz with pathetic chinese or thiland rims .
Steel rims performed best on Ciaz