{"product_id":"ngk-laser-iridium-spark-plug-97506-silzkbr8d8s-4-pack-iridium-tip-oem-fit-for-bmw","title":"NGK Laser Iridium Spark Plug 97506 (SILZKBR8D8S) 4-Pack — Iridium Tip, OEM Fit for BMW","description":"\u003cstrong\u003eNGK 97506 (SILZKBR8D8S) Laser Iridium spark plugs are high-performance, long-life replacement plugs designed to match original-equipment specifications for many BMW models.\u003c\/strong\u003e\n\n\u003cp\u003eThese Laser Iridium plugs combine a fine iridium center tip and a platinum ground tip on a copper core to deliver consistent ignition, extended service intervals, and reliable fitment where factory NGK plugs were specified. The 97506 (SILZKBR8D8S) is commonly used across multiple BMW 2-, 3-, 4-, 5-, X- and Z-series model years; check engine and drivetrain compatibility before ordering to ensure correct quantity and fit.\u003c\/p\u003e\n\n\u003ch3\u003eWhich BMW models use the NGK 97506 plug?\u003c\/h3\u003e\n\u003cp\u003eThese plugs are compatible with a broad range of BMW vehicles equipped with compatible engines from roughly 2012–2018. They are commonly fitted to entry-level turbocharged engines used in several 2-, 3-, 4-, 5-, X- and Z-series variants.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e228i (2014–2016) and 228i xDrive (2015–2016)\u003c\/li\u003e\n  \u003cli\u003e320i\/320i xDrive (2012–2018), 328i\/328i xDrive\/GT xDrive (2012–2016)\u003c\/li\u003e\n  \u003cli\u003e428i series including Gran Coupe and xDrive variants (2014–2016)\u003c\/li\u003e\n  \u003cli\u003e528i (2012–2016), X1\/X3\/X4\/X5 model ranges, and Z4 (various years listed)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the Laser Iridium design affect ignition performance?\u003c\/h3\u003e\n\u003cp\u003eNGK’s fine-wire iridium center electrode and square platinum ground tip reduce the voltage required to fire the plug, supporting easier starts and a more consistent spark under varied loads. The long-projection center electrode and fine-wire design focus the spark for stable ignition and smoother throttle response.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium center tip for high-temperature durability and lower wear\u003c\/li\u003e\n  \u003cli\u003eSquare Platinum Electrode (SPE) ground tip for improved ignitability\u003c\/li\u003e\n  \u003cli\u003eCopper core center and ground electrode for rapid heat transfer\u003c\/li\u003e\n  \u003cli\u003ePre-gapped to 0.030 in (0.75 mm) to match OEM expectations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key technical features and dimensions?\u003c\/h3\u003e\n\u003cp\u003eThe 97506 plug is built to match OEM mechanical and electrical specs so it fits properly and performs reliably. It includes a resistor and ceramic insulator, a flat seat, and a 14mm bi-hex hex size for installation with common tools.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePart number: SILZKBR8D8S \/ Stock: 97506; heat range 8\u003c\/li\u003e\n  \u003cli\u003eThread diameter 12.0 mm, reach 26.5 mm (1.043 in), flat seat\u003c\/li\u003e\n  \u003cli\u003eInsulator height 51.0 mm, hex size 14 mm bi-hex, pre-gap 0.030 in\u003c\/li\u003e\n  \u003cli\u003eResistor-equipped, non-removable nut terminal, washer included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I know about lifespan and maintenance?\u003c\/h3\u003e\n\u003cp\u003eIridium and platinum materials extend service life compared with standard copper plugs, but replacement intervals depend on driving conditions and engine tuning. Always follow your vehicle manufacturer’s maintenance schedule and inspect plugs for fouling, electrode wear, or damage when diagnosing misfires or performance issues.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium center and platinum ground extend useful life versus copper-only plugs\u003c\/li\u003e\n  \u003cli\u003eRecommended to verify torque and electrode condition at service intervals\u003c\/li\u003e\n  \u003cli\u003eUse correct quantity and proper gap; research engine-specific requirements before purchase\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Owners and technicians who need direct-fit NGK OEM-equivalent spark plugs for compatible BMW engines seeking reliable starts, steady combustion, and longer replacement intervals. Ideal for routine maintenance, restorations to factory spec, or performance-minded drivers who prefer NGK’s Laser Iridium construction for longevity and stable ignition.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these NGK plugs direct replacements for BMW stock plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — SILZKBR8D8S (97506) is an OEM-equivalent used in many BMW models; verify engine and year compatibility before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What gap should I use for these spark plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They come pre-gapped to 0.030 in (0.75 mm); confirm your vehicle’s service manual before adjusting.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48082751422622,"sku":"B01MQH2QAN","price":113.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-laser-iridium-front-packaging_fde3e3e6-b66f-4c60-873c-bbaad7e61860.jpg?v=1785813115","url":"https:\/\/northtrailauto.ca\/products\/ngk-laser-iridium-spark-plug-97506-silzkbr8d8s-4-pack-iridium-tip-oem-fit-for-bmw","provider":"North Trail Auto","version":"1.0","type":"link"}