Buick Regal Spark Plug Iridium Platinum 91026 91970 ILNAR8A8G 1.5T/1.4T

Buick LaCrosse 1.5T and 1.4T iridium-platinum spark plugs; OEM numbers 91026, 91970, ILNAR8A8G; installed in the cylinder head to ignite the mixture and ensure combustion efficiency and power output. Suitable for LaCrosse 1.5T and 1.4T versions; replacement complexity medium; time about 1 hour; torque with a standard wrench. If idle jitter, weak acceleration, increased fuel consumption or starting difficulties occur, electrode wear or heavy carbon buildup; replace promptly.