NHTSA Complaint #10158185 — 2000 MAZDA MILLENIA

THE IGNITION COILS IN MY CAR ARE GOING BAD. ONE RIGHT AFTER THE OTHER. MAZDA TOLD ME THAT THE HEAT OF THE ENGINE (MILLER CYCLE) IS CAUSING THIS. I THINK THE ENGINE WAS POORLY DESIGNED. THERE ARE 6 COILS & I HAVE REPLACED 3 SO FAR, 1 IN 12/04 & 2 IN 4/06 ALONG WITH ALL THE PLUGS. THIS PROBLEM STARTED IN 2002 WHEN CYLINDER #4 WAS MISFIRING. MAZDA REPLACED THE SPARK PLUG. THE COIL IN CYLINDER #4 WAS THE FIRST COIL TO GO BAD. THE ORIGINAL PLUGS WERE CHAMPION. I WAS TOLD THESE WERE THE WRONG PLUGS ESPECIALLY FOR THIS TYPE OF HIGH PERFORMANCE ENGINE. MAZDA SAID TO EXPECT TO REPLACE THE OTHER 3 COILS. & THEN WHAT? DO WE START OVER AGAIN? MY CAR ONLY HAS 32,000 MILES ON IT. BOTH CATALYTIC CONVERTERS HAVE BEEN REPLACED. I THINK MAZDA SHOULD DO SOMETHING TO CORRECT THE DESIGN OF THIS ENGINE TO ALLOW THE COILS MORE AIR. *JB