I work in a senior position in a Tata group company. Bought Tata Manza(Diesel) on 17th August 2011. The engine collapsed in November and since then every possible part in the company has been changed - Cluth, gear, brakes, coolant tank, digital display, the automatic window controller unit et al.
In an email communication the dealer has officially acknowledged that they have sold me a defective car. An independent 3rd party review of the car also indicated a highly defective car. During the last 4 years I have spent more than 70K in repairs on top of all the free repairs under warranty. I reached out to almost every possible top management at Tata Motors but in vain.
Unfortunately I had to sue Tata Motors in the Consumers Forum in 2012. After battling for almost 3 years, I have won the case in the lower court and now fighting it in the National Forum. Avoid buying any Tata car if you love you hard earned money.