@tausifs, I really appreciate your information and the awareness that you have created about this unit. Hats off to you! 
I wanted to ask you something about the faulty previous unit.
The cars that have the older, faulty unit factory fitted in them; can the unit be changed from TW for the same amount of difference you paid them keeping in mind that the car is a 2014 or even 2013 model (9th Gen Civic)? If a Civic has that unit installed, will TW replace it at Rs. 85,000 or at Rs. 15,000 as difference by giving them the previous unit?
I would appreciate your feedback! 
Thank you!