Set of 4 Iridium Spark Plugs & Ignition Coils for Nissan Serena C25 NC25 (Part Numbers 22401-ED815, 22448-1KT0A, Etc.)

These aftermarket spark plugs and ignition coils are compatible with the Nissan Serena C25/NC25 (May 2005 - November 2010) and feature an MR20DE engine. This set includes four spark plugs and four ignition coils. OEM part numbers: Spark Plugs 22401-CK81B, 22401-ED815, 22401-JA01B / Ignition Coils 22448-JA00C, 22448-ED000, 22448-EN200, 22448-1KT0A. The ignition coil is an internal combustion engine's ignition device that directly supplies the generated current to the spark plug. Its short distance from the ignition coil to the spark plug minimizes voltage loss. This system offers better combustion efficiency than a mechanical system that uses a distributor, resulting in stronger torque and improved fuel economy. Because it works hard to keep your car running, we recommend replacing it with a new one around 100,000 km to avoid any issues. If the ignition coil isn't working properly, the following symptoms may occur: Stuttering or sluggish acceleration, unstable idling or stalling, and difficulty starting the engine even when there are no problems with the battery or starter motor. In a cramped engine compartment, aging can increase the resistance of the copper wire wound inside, preventing it from generating high voltage or causing it to break, leading to breakdowns. If you suspect a malfunction, we recommend replacing the entire assembly with a new one. While many people opt for expensive manufacturer-supplied parts, you can reduce costs with high-quality, affordable aftermarket parts. Proper maintenance will make you love your car even more and make you want to keep it for years to come.