Suraksha does a good job.
Bimal in Bannerghatta Road and Kankpura Road is also good.
The total estimate will be around 7-8 K as per Varun and it must be alright.
You have not given the age and model of the vehicle ,so show it to the MASS.
Dont worry they cannot rip you off for just showing the car.
Take it to any of the MASS and lets see what they are quoting.