TL*THE CONTACT OWNS A 2005 NISSAN ALTIMA. THE CONTACT EXPERIENCED ENGINE FAILURE EVER SINCE THE VEHICLE WAS PURCHASED. THE ENGINE FAILED AND HAD TO BE REPLACED TWICE. THE FIRST TIME, THE CONTACT HEARD SOMETHING POP WHILE DRIVING 60 MPH, AND THE VEHICLE BEGAN SMOKING. THE VEHICLE WAS TOWED TO THE DEALER AND WAS REPAIRED UNDER THE EXTENDED WARRANTY. WHEN THE VEHICLE WAS TAKEN IN FOR AN OIL CHANGE, THE CONTACT WAS INFORMED THAT SHE NEEDED ANOTHER ENGINE BLOCK. SHE HAD IT REPLACED, BUT THE VEHICLE STILL BEGAN TO PULL AND HESITATE AS IF IT WOULD LOSE POWER. THE VEHICLE HAS YET TO COMPLETELY SHUT OFF. THE CURRENT MILEAGE WAS 73,866 AND FAILURE MILEAGE WAS APPROXIMATELY 150.