Ignition Coil and Iridium Spark Plugs for Nissan Sentra (2002-2008) 2.5L

Direct-Fit Ignition Coil and Iridium Spark Plug Service Kit for 2002-2008 Nissan Sentra

Direct-fit replacement ignition tune-up kit: Restores factory spark energy, stabilizes idle, and resolves primary ignition misfires across 4-cylinder Nissan applications.

The Stock Sentra Ignition Degradation

The QR25DE engine generates high thermal loads in the cylinder head, leading to premature thermal breakdown of the factory coil-on-plug boots and epoxy insulation. Over continuous heat cycles, secondary winding resistance climbs, causing dielectric breakdown, erratic spark timing, high-load spark blowout, and severe P0300-P0304 misfire codes that compromise fuel efficiency and throttle response.

The Engineering Solution

This service kit pairs four heavy-duty coil-on-plug assemblies featuring high-grade internal copper windings and high-dielectric epoxy with four fine-wire iridium spark plugs. The copper windings provide consistent high-voltage discharge under boost and compression, while the fine-wire iridium electrodes resist thermal erosion, reduce required ionization voltage, and maintain precise gap tolerances across high-RPM operation.

Technical Specifications

Compatibility

• 2002-2006 Nissan Sentra SE-R / SE-R Spec V 2.5L L4 (B15)
• 2003-2006 Nissan Sentra Limited Edition 2.5L L4 (B15)
• 2007-2008 Nissan Sentra SE-R / SE-R Spec V 2.5L L4 (B16)

The Nissan Performance Standard

Engineered to withstand the demanding high-revving nature of tuned naturally aspirated JDM platforms, this ignition kit delivers crisp throttle modulation, clean combustion cycles, and reliable cold-start operation under heavy operational duty.