Renault OEM Replacement Spark Plug 7700500180 Rainbow Coating SCTB459 Stable Ignition

Renault Clio, Megane, Laguna and many post-2000 models use the iridium spark plug 7700500180 with rainbow coating, which enhances high-temperature oxidation resistance and electrode wear; real-world ignition stability is better than most similarly priced replacements. OEM number 7700500180, resistance 6 kΩ, thread size M14x1.25, reach 26.5 mm; direct replacement with no adjustment. Installation difficulty medium; torque to spec on opposing sides with a torque wrench to ensure seal and performance.