Tata Motors — About my 6 & half yr. old vista quadrajet jst 48000 kms old.

Address:	Patna, Bihar, 800020
Website:	www.consumercomplaints.in

Sir i purchased tata vista quadrajet aura in oct.2009, my car no.Br01ar 9137, just 48000 kms old, single handedly used my me, all services done on time, all at one place aastha motors(Kumar distributers pvt.Ltd.), kankarbagh bypass, patna, emitting excessive smokes, when the examined my car, they found some rough surface on 4th piston ring.My only question is who is respondible for such an early damage, its authorised service centre, the manufacturer i.E.Tata motors or the buyer who purchased wrong car?
P.N.Verma