{"product_id":"xiaoyudou-serpentine-belt-drive-kit-for-bmw-3-0l-l6-2006-2013-tensioner-idler-pulley-belt-bolt-reinforced-bearings","title":"Xiaoyudou Serpentine Belt Drive Kit for BMW 3.0L L6 (2006–2013) — Tensioner, Idler Pulley, Belt \u0026 Bolt, Reinforced Bearings","description":"\u003cp\u003e\u003cstrong\u003eXiaoyudou complete drive kit replaces worn belt tensioner, idler pulley, serpentine belt and tensioner bolt for BMW 3.0L L6 engines (2006–2013) to restore reliable accessory drive operation.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis all-in-one replacement set contains a belt tensioner, idler pulley, serpentine belt and tensioner bolt engineered to match the fit and function required by many BMW 3.0L inline-six applications. Each component is built from reinforced materials and inspected before shipping to reduce vibration, limit belt slip and return consistent accessory drive tension. The kit replaces multiple OE numbers so you can quickly swap a single package for common worn parts during scheduled service or when diagnosing drive‑belt noise and wear.\u003c\/p\u003e\n\n\u003ch3\u003eWhich BMW models and part numbers does this kit replace?\u003c\/h3\u003e\n\u003cp\u003eThis kit is designed to fit BMW 3.0L L6 models from the mid-2000s through early 2010s, covering many variations of the 1-, 3-, 5-series and X3 with that engine. It directly replaces several original equipment numbers for tensioners, idler pulleys, the belt and the mounting bolt for straightforward interchangeability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible models include BMW 128i (2008–2013), 323i (2006–2011), 325i\/325xi (2006), 328i\/328xi (2007–2013), 330i\/330xi (2006), 525i\/525xi\/528i\/528xi\/530i\/530xi (2006–2010) and X3 (2007–2010) with 3.0L L6 engines.\u003c\/li\u003e\n  \u003cli\u003eReplaces tensioner numbers: 39112, 11288624196, 11287530314, 28708, 305399, 89399.\u003c\/li\u003e\n  \u003cli\u003eReplaces idler numbers: 11287535860, 89163, 36369; belts: 6K1990, 11287628650, 11287549150, W01331681440, W01331779583.\u003c\/li\u003e\n  \u003cli\u003eTensioner bolt replacement: 11287530315.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the kit improve drive-belt performance and noise?\u003c\/h3\u003e\n\u003cp\u003eReplacing worn tensioners and idler pulleys restores correct belt alignment and tension, reducing slippage and uneven wear that commonly cause squeal and vibration. The reinforced construction and quality bearings lower noise and help maintain steady accessory operation under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNew tensioner restores proper spring tension and preload for the belt system.\u003c\/li\u003e\n  \u003cli\u003eSmooth idler pulley bearings reduce wobble and drivetrain vibration.\u003c\/li\u003e\n  \u003cli\u003eFresh serpentine belt with correct rib profile improves grip and accessory drive efficiency.\u003c\/li\u003e\n  \u003cli\u003eTensioner bolt ensures secure mounting and correct torque retention.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s included and what should I inspect during installation?\u003c\/h3\u003e\n\u003cp\u003eThe package supplies everything needed to refresh the belt drive: one tensioner, one idler pulley, one serpentine belt and a tensioner bolt. During installation check pulley alignment, belt routing, accessory pulleys and engine mounts for wear to prevent premature return of symptoms.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncluded in box: belt tensioner, idler pulley, serpentine belt, tensioner bolt.\u003c\/li\u003e\n  \u003cli\u003eInspect alternator, A\/C compressor and water pump pulleys for roughness or play.\u003c\/li\u003e\n  \u003cli\u003eVerify belt routing and rib alignment before torquing the new tensioner bolt.\u003c\/li\u003e\n  \u003cli\u003eReplace any cracked hoses or worn mounts found during access for long-term reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable is the Xiaoyudou kit and what warranty is offered?\u003c\/h3\u003e\n\u003cp\u003eComponents are produced from reinforced materials and undergo testing to reduce vibration and runout; proper installation helps achieve expected service life comparable to aftermarket standards. Xiaoyudou supports the kit with a two-year warranty against manufacturing defects—contact customer service for replacement guidance if issues arise.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReinforced materials and pre-shipment testing to control vibration.\u003c\/li\u003e\n  \u003cli\u003eTwo-year warranty for defects, with replacement support from the brand.\u003c\/li\u003e\n  \u003cli\u003eRecommended to follow service intervals and inspect associated components for best longevity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This kit is aimed at owners and independent technicians servicing BMWs with the 3.0L inline-six who need a single, vehicle-specific package to replace worn belt-drive components. It’s a practical choice for routine maintenance, restoring proper belt tension after pulley failure, or performing preventative replacement during larger engine or front-end service intervals.\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: Will this kit fit my BMW 328i 2010 with the 3.0L L6 engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit lists compatibility with BMW 328i models from 2007–2013 with the 3.0L L6 engine.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the package include the serpentine belt and bolt?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes the serpentine belt, belt tensioner, idler pulley and the tensioner bolt.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Xiaoyudou","offers":[{"title":"Default Title","offer_id":48084074758302,"sku":"B0FH22XCRG","price":79.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/xiaoyudou-kit-front-packaging.jpg?v=1785845505","url":"https:\/\/northtrailauto.ca\/products\/xiaoyudou-serpentine-belt-drive-kit-for-bmw-3-0l-l6-2006-2013-tensioner-idler-pulley-belt-bolt-reinforced-bearings","provider":"North Trail Auto","version":"1.0","type":"link"}