{"product_id":"marsauto-d4s-hid-bulbs-66440-42402-42402wx-42402c1-for","title":"Marsauto D4S HID Bulbs, 66440 42402 42402WX (‎42402C1) for","description":"\u003cstrong\u003eMarsauto D4S HID bulbs (42402\/42402WX) are plug-and-play 6000K xenon replacement lamps that deliver crisp cold-white illumination and OEM-fit performance for compatible HID assemblies.\u003c\/strong\u003e\n\n\u003cp\u003eThese Marsauto D4S 35W bulbs (also listed as 66440, 42402, 42402WX, 42402C1) are designed as direct replacements for D4S-type HID headlamps. They produce a clean 6000K cold-white tone, reach usable brightness within seconds, and match factory dimensions so most vehicles accept them without modification. Built with UV-resistant quartz, tightly sealed envelopes, and precision electrodes, they target reliable, long-service lighting for road use.\u003c\/p\u003e\n\n\u003ch3\u003eHow quickly do these bulbs reach full brightness?\u003c\/h3\u003e\n\u003cp\u003eThe Marsauto D4S lamps are engineered to warm up to effective illumination in roughly five seconds, giving near-instant light compared with older designs. That means safer, more consistent visibility when you turn the headlights on at night or in changing light conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFull usable brightness in about 5 seconds\u003c\/li\u003e\n  \u003cli\u003eHigh-efficiency electrodes for fast arc stabilization\u003c\/li\u003e\n  \u003cli\u003eStable color temperature during warm-up: around 6000K\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these fit my vehicle and require extra parts?\u003c\/h3\u003e\n\u003cp\u003eThese bulbs are manufactured in a 1:1 OEM size for D4S HID assemblies, so they typically install without adapters or rewiring. The product is supplied as a pair and labeled plug-and-play to simplify replacement in compatible headlamp housings.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eExact D4S dimensions for direct fitment\u003c\/li\u003e\n  \u003cli\u003ePlug-and-play electrical interface—no ballast change required if your system already uses D4S\u003c\/li\u003e\n  \u003cli\u003eSold as a pack of two for axle pairs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long will the bulbs last and how durable are they?\u003c\/h3\u003e\n\u003cp\u003eMarsauto quotes an expected service life around 3,000 hours thanks to UV-resistant quartz glass and airtight sealing that limits gas loss. Mechanical robustness is improved through laser-welded construction and vibration-resistant assembly to handle daily driving conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEstimated life: roughly 3,000 hours under normal operation\u003c\/li\u003e\n  \u003cli\u003eUV-resistant, heat-tolerant quartz envelope\u003c\/li\u003e\n  \u003cli\u003eLaser-welded structure resists shocks and vibration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat light quality and color can I expect on the road?\u003c\/h3\u003e\n\u003cp\u003eThe bulbs emit a 6000K cold-white beam that emphasizes contrast and gives a modern daylight appearance. Their pure xenon gas fill and APL capsule design aim to reduce dark spots and provide consistent beam patterns when installed in properly aligned reflectors or projectors.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e6000K cold-white color for high-contrast illumination\u003c\/li\u003e\n  \u003cli\u003e99.99% xenon fill with APL capsule for uniform arc\u003c\/li\u003e\n  \u003cli\u003eEngineered for clean beam quality with minimal glare when aligned correctly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? These Marsauto D4S 35W, 6000K bulbs are best for drivers who need a direct, factory-compatible HID replacement with a cool white tone, faster warm-up, and solid mechanical durability. They suit vehicles specified for D4S lamps and owners who prefer plug-and-play upgrades without modifying ballasts or housings. If you require a different color temperature, wattage, or a non-D4S fitment, verify your vehicle’s headlamp specification before purchase.\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 bulbs compatible with my car's HID system?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They fit vehicles that require D4S bulbs and use standard D4S ballasts; confirm your owner's manual or existing bulb label before buying.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these require any coding or ballast changes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No ballast or coding typically needed for vehicles already equipped with D4S HID systems; they are plug-and-play replacements.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Marsauto","offers":[{"title":"Default Title","offer_id":48087457661086,"sku":"B0F475STTK","price":40.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/marsauto-d4s-front-packaging.jpg?v=1785924329","url":"https:\/\/northtrailauto.ca\/products\/marsauto-d4s-hid-bulbs-66440-42402-42402wx-42402c1-for","provider":"North Trail Auto","version":"1.0","type":"link"}