Fuel Injector problems of the 1999 Toyota Avalon

Vehicle had a sudden loss of power, began running rough, followed by engine check" light coming on. Dealer determined there was a bad fuel injector and said Toyota recommended replacing all six injectors to repair. I asked if these were defective injectors and was told no. Called Toyota customer service and was told same thing. If there is no defect, why would I replace all six injectors? this would cost me nearly 5 times as much. Either there is a known defect requiring replacement of all injectors or this is a ruse to get unsuspecting customers to pay more for service. The customer does not have sufficient information to make a decision on the appropriate repair. I was not told at the time of purchase that this car may contain defective parts. If Toyota knows of a manufacturing defect with these injectors they should replace them when a failure occurs, not the customer.

While driving engine check light came on. Vehicle taken to dealer who determined that fuel injectors needed to be replaced.