The NGK Spark Plug Set is a direct-fit replacement for BMW 3 Series and BMW X3 2.0L Turbo Petrol models built from 2016 to 2025. Service life of up to 90,000km is typical in normal conditions. Ribbed insulator construction prevents flashover to the coil boot. The Platinum centre electrode is 4.0mm in diameter, which lowers the voltage needed to jump the gap and improves cold starting. Replacing plugs as a full set keeps cylinder-to-cylinder combustion even and prevents misfire codes. A trivalent metal plating on the shell resists corrosion and seizing in aluminium heads. Supplied new and backed by a 2 Years / 40,000 km warranty.