1999 Lexus GS300

I AM AN OWNER OF A 1999 LEXUS GS300. I JUST RECENTLY HAD 2 FUEL INJECTORS FAIL AND LEAK GASOLINE IN AND OVER THE ENGINE. I WAS NOTIFIED THAT THIS COULD HAVE BEEN A FATAL FIRE OR EXPLOSION. I WAS NOT COVERED UNDERNEAT WARRANTY FOR THIS ISSUE AS I TOOK THE CAR IN AT 70,000 MILES. WHAT I HAVE SUCH A PROBLEM WITH IS THAT THIS CAR IN PARTICULAR, BEING THAT IT IS A LEXUS, SHOULD NOT HAVE TOO MANY PROBLEMS NOR REPEATING PROBLEMS. THIS TAKES ME TO THE HISTORY OF THE VEHICLE. AT 23,000 MILES THE FUEL INJECTORS WERE REPLACED. THEN AGAIN, 2 YEARS LATER, AT 42,000 MILES, AN ADDITIONAL FUEL INJECTOR HAD TO BE REPLACES. AND NOW AN ADDITIONAL 2 YEARS LATER I HAVE 2 FUEL INJECTOS GO BAD AS WELL. DID I BUY A LEMON? DID I GET A BAD EGG FROM A REPUTABLE CAR MANUFACTURER? I DON'T BELIEVE I SHOULD BE REQUIRED TO PAY FOR THIS ISSUE AND THAT I PURCHASED A CAR WITH PROBLEMS THAT ARE TOO FREQUENT AND "FISHY!" THE MECHANIC AND SALES REP. AT THE CURRENT DEALER I USE SAID THIS IS AS UNIQUE AS IT GETS AND THAT HE RARELY IF EVER SEES PROBLEMS LIKE THIS FROM THIS CAR. PLEASE HELP!!!*AK