Bosch OE Fine Wire Double Platinum Spark Plugs use a platinum firing pin and ground electrode inlay to deliver up to 3x longer life than standard copper plugs. The 360-degree, continuous laser welded fine-wire platinum firing pin design provides improved corrosion resistance, ignitability, and overall performance. Nickel-plated rolled threads offer superior corrosion resistance and do not require anti-seize during installation. Pre-gapped at the factory, these plugs are ready to install straight out of the box; gap adjustment is not required prior to installation. Meets or exceeds manufacturer design requirements for OE fit, form, and function in modern gasoline engines. Compatible with select BMW models: - 11-13 135i, 13 135is, 14 235i, 11-15 335i, 14-16 335i GT xDrive, 11-15 335i xDrive, 14-16 435i - 15-16 435i Gran Coupe, 14-16 435i xDrive, 15-16 435i xDrive Gran Coupe, 11-16 535i, 10-17 535i GT, 11-17 535i GT xDrive, 11-16 535i xDrive, 11-13 550i, 10-12 550i GT, 10-12 550i GT xDrive, 11-13 550i xDrive, 12-18 640i - 13-19 640i Gran Coupe, 14-18 640i xDrive, 14-19 640i xDrive Gran Coupe, 12 650i, 12 650i xDrive, 13-15 740i, 13-15 740Li, 13-15 740Li xDrive, 09-12 750i, 10-12 750i xDrive, 09-12 750Li, 10-12 750Li xDrive, 10-15 760Li Note: engine affects fitment. Verify specific fitment details with Amazon's confirmed fit checker. Use scenarios: - Routine maintenance on BMW gasoline engines listed to restore smooth idle, responsiveness, and overall efficiency. - High-mileage BMW engines that benefit from longer life and reduced maintenance frequency. - During scheduled tune-ups or repairs where a reliable, OEM-style spark plug replacement is desired to maintain factory performance.