Since after 25000 km the engine performance was jerky and the service engine light came on and off. The first dealer could not find the fault until I took the car to the other dealer who found the fault after the second checkup and changed one ignition coil under warranty. Now after the expiration of the warranty I have the same problem, "sevice engine soon" light comes on. I took the car to the dealer, the first time he could not find which coil was defective. He fixed the light and told me to come again if this light comes on again. I went again today on march 08, 2003. The service manager told me that there is an ignition problem and he cannot find which coil out of six is bad. He suggested when one coil is gone ultimately all the coils will go. The cost of repair would be $1500 for parts plus labour. I already paid $36 twice for checking the same fault. I talked to the Nissan complaint center, the Nissan agent replied that if the service manager suggest to replace all six coils you must replace all six coils if you want to repair the car and Nissan will not reimburse the cost as the three years of basic warranty has expired. The three warranty expired on march 31, 2002. The car has done only 57000 km. With reference to service manager diagnostic, when one coil is gone one by one all the coil will go soon. The first coil was gone within warranty period. So the fault started in the warranty period. What should be the servce life of a ignition coil. Would anybody suggest what should be my course of action?