16 ES300 — NEW FEATURES Ignition Coil A compact and cylindrical ignition coil with a built- in igniter has been adopted. Shaped in such a way that it can be placed directly over the spark plug, the ignition coil is installed in the spark plug hole of the cylinder head. As a result, the high-tension cords are no longer necessary and high-voltage loss and electromagnet- ic interference have been reduced. Igniter Ignition Coil Plug Cap 161ES45 Spark Plug As in the ’98 LS400, the iridium-tipped spark plugs are used. Their center electrode is made of iridium, which excels in wear resistance. As a result, the center electrode is made with a smaller diameter and improved the ignition performance.
Recommended Spark Plugs 0.7 mm Iridium Tip Platinum Tip 151EG39 DENSO SK20R11 NGK IFR6A11 Plug Gap 1.0 − 1.1 mm (0.0394 − 0.0433 in.)