NGK COP Ignition Coil Stock # 48668

The NGK COP Ignition Coil Stock # 48668 (MPN U5027) is a coil-on-plug pencil-type ignition coil engineered to OEM specifications for direct replacement on compatible engines. This single-unit ignition coil pack delivers the spark timing precision necessary for reliable engine combustion, cold-start performance, and consistent fuel economy across all load conditions.

Coil-on-plug design positions the ignition coil directly above each spark plug, eliminating long secondary ignition wires and reducing electrical losses that occur in older distributor-based systems. The pencil-type form factor is compact and mounts cleanly in modern engine bays. NGK's OE-specification construction ensures the coil output voltage, current, and dwell timing match the vehicle's engine control module parameters precisely. This compatibility is critical—ignition coils not matched to OEM specs can cause spark knock, misfire codes, and degraded emissions control performance.

This coil replacement is intended for technicians and owners maintaining or restoring vehicles equipped with COP ignition systems. It addresses ignition system aging, wear-related voltage drop, or failure in one coil pack without requiring full system replacement. At 0.61 lbs and compact dimensions, installation follows OEM procedures and requires no modifications to engine bay components or wiring harnesses.

NGK is the original equipment supplier for ignition systems across major automotive manufacturers. COP ignition technology has been industry standard since the 1990s and remains the predominant ignition architecture in modern vehicles. Choosing OE-equivalent coils ensures spark plug firing occurs at the precise moment engine load and speed demand it, preserving combustion efficiency and protecting catalytic converter longevity.