Nissan Iridium Spark Plug 7700500155 B2401-00QAA OEM Direct Replacement

Nissan iridium spark plug 7700500155 (B2401-00QAA) directly replaces original parts, fits 2000 onwards X-Trail, Tiida, Sunny and other 1.6L–2.0L engines with no modification. Its role is to ignite the air-fuel mixture in cylinders to ensure complete combustion and stable power. Installation difficulty medium; torque wrench recommended to original torque; labor about 30–60 minutes. Symptoms include cold-start difficulties, rough idle, or weak acceleration indicating worn spark plugs.