{"product_id":"performance-drive-belt-tensioner-kit-for-toyota-4runner-2003-2009-4-0l","title":"Performance Drive Belt Tensioner Kit for Toyota 4Runner (2003-2009) 4.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Drive Belt Tensioner \u0026amp; Idler Pulley Kit for 2003-2009 Toyota 4Runner (N210)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Drive Belt Tensioner Kit replaces worn tensioner assemblies and idler pulleys on the 2003-2009 Toyota 4Runner to restore proper serpentine belt tension, eliminate drive slip, and prevent accessory drive failure.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Toyota 4Runner Accessory Drive Weakness\u003c\/h3\u003e\n\u003cp\u003eOver high heat and continuous mileage, the factory mechanical dampener on the \u003cstrong\u003eN210\u003c\/strong\u003e platform's accessory drive loses hydraulic or internal spring tension. The sealed bearings inside the OEM idlers dry out, causing high-friction thermal breakdown, belt squeal, harmonic vibrations, and catastrophic belt throw. Under demanding load or off-road conditions, slack in the drive belt causes inconsistent alternator charging, reduced water pump flow, and steering assist loss on the \u003cstrong\u003e1GR-FE\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement drive belt kit restores structural rigidity and factory-spec dampening to the serpentine drive system. Constructed with precision-machined heavy-duty alloy castings and premium sealed roller bearings, each component resists grease extrusion and contaminants under extreme thermal stress. The high-torsion internal coil spring provides continuous dynamic tension, counteracting cyclical crank pulses and reducing belt slap across high-rpm power bands.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Drive Belt Tensioner Assembly (Replaces \u003cstrong\u003e16620-31013\u003c\/strong\u003e \/ \u003cstrong\u003e16620-31012\u003c\/strong\u003e)\u003c\/li\u003e\n  \u003cli\u003e1x Idler Pulley (Replaces \u003cstrong\u003e16603-31040\u003c\/strong\u003e \/ \u003cstrong\u003e16603-0P030\u003c\/strong\u003e)\u003c\/li\u003e\n  \u003cli\u003e2x Upper\/Lower Idler Pulleys (Replaces \u003cstrong\u003e16604-31020\u003c\/strong\u003e \/ \u003cstrong\u003e16604-0P011\u003c\/strong\u003e)\u003c\/li\u003e\n  \u003cli\u003e1x Serpentine Drive Belt (Replaces \u003cstrong\u003e90916-A2001\u003c\/strong\u003e \/ \u003cstrong\u003e90916-02571\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2003-2009 Toyota 4Runner\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1GR-FE 4.0L V6 \/ N210\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e245 hp \/ 282 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1662031013, 1662031012, 1660331040, 166030P030, 1660431020, 166040P011, 90916A2001, 9091602571\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003-2009 Toyota 4Runner 4.0L 1GR-FE V6 (SR5, Sport Edition, Limited)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the N210 4Runner?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2003-2009 Toyota 4Runner equipped with the \u003cstrong\u003e1GR-FE\u003c\/strong\u003e 4.0L V6 engine; it does not fit 4.7L 2UZ-FE V8 models.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to replace all idlers when installing a new tensioner?\u003c\/h4\u003e\n\u003cp\u003eYes, replacing all idler pulleys concurrently ensures uniform rotational resistance and prevents premature belt failure on the front accessory drive.\u003c\/p\u003e\n\n\u003ch3\u003eThe Toyota Off-Road Standard\u003c\/h3\u003e\n\u003cp\u003eWhen overlanding, rock crawling, or hauling heavy payloads, belt drive reliability is critical to prevent sudden overheating or loss of power steering deep in the backcountry.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67545396117752,"sku":"DS-ESJVOVRSM","price":80.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-drive-belt-tensioner-kit-for-toyota-4runner-2003-2009-4-0l-1.jpg?v=1790722908","url":"https:\/\/performancechiptuning.com\/products\/performance-drive-belt-tensioner-kit-for-toyota-4runner-2003-2009-4-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}