I'v owned a Santro Club GV since 2006 and there was never a major problem but i'v heard the newer santro primes have some issues. I once had a faulty viper problem which i reported to my dealer (Hyundai Twin City, Islamabad), they made a case for warranty replacement but for some reason, dewan rejected the case. I wrote an "angry" email to Dewan motors complaining about this and within 2 hours i got a call from their Regional Sales Manager asking what had happened. He was being very apologetic about the whole episode and assigned their regional service manager to this task who the next day took me with him to twin city and got my problem resolved so i was a happy bunny once again. I can post the email that i wrote and the reply that i got from them here if i find it since it was 2 years back but i hope you have your problems resolved by now.