{"product_id":"performance-water-pump-kit-for-mercedes-benz-m-class-2012-2015-3-5l","title":"Performance Water Pump Kit for Mercedes Benz M-Class (2012-2015) 3.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Water Pump and Accessory Drive Kit for 2012-2015 Mercedes Benz M-Class (W166)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Water Pump Kit replaces the complete cooling and front accessory drive system on the 2012-2015 Mercedes Benz M-Class to prevent catastrophic engine overheating, eliminate coolant leaks, and restore belt drive stability.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz M-Class Cooling System Degradation\u003c\/h3\u003e\n\u003cp\u003eIn the \u003cstrong\u003eW166\u003c\/strong\u003e chassis paired with the naturally aspirated \u003cstrong\u003eM276\u003c\/strong\u003e 3.5L V6, prolonged thermal cycling severely degrades the factory cooling assembly. The stock mechanical water pump commonly suffers from internal shaft bearing play and weep-hole seal degradation past 75,000 miles. Concurrently, the composite thermostat housing distorts under heat soak, producing persistent seal weepage. When leaking ethylene glycol contaminates the serpentine drive, it accelerates rubber rot across the drive belts, causing tensioner damper failure and idler pulley bearing seizure that can strand the vehicle.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis service kit provides a comprehensive front-engine overhaul for the \u003cstrong\u003eM276\u003c\/strong\u003e platform. The replacement mechanical water pump utilizes a high-strength cast alloy housing, a cavitation-resistant impeller, and heavy-duty mechanical shaft seals built to handle prolonged high-RPM operating temperatures. A factory-matched thermostat housing assembly with integrated thermal sensor maintains strict coolant metering. Paired with a new spring-damped belt tensioner, precision-bearing idler pulley, and dual EPDM serpentine belts, this system eliminates accessory belt slip and prevents thermal runaway under heavy load.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Mechanical Water Pump Assembly\u003c\/li\u003e\n  \u003cli\u003e1 Water Pump Gasket\u003c\/li\u003e\n  \u003cli\u003e1 Engine Coolant Thermostat Housing Assembly with Thermostat\u003c\/li\u003e\n  \u003cli\u003e1 Serpentine Belt Tensioner Assembly\u003c\/li\u003e\n  \u003cli\u003e1 Idler Pulley with Mounting Hardware\u003c\/li\u003e\n  \u003cli\u003e2 Serpentine Drive Belts\u003c\/li\u003e\n  \u003cli\u003e1 O-Ring\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;\"\u003e2012-2015 Mercedes Benz M-Class\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;\"\u003eM276 (3.5L V6) \/ W166\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;\"\u003e302 hp \/ 273 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;\"\u003e2762001301, 276200130180, 276200130187, US8173, 147-2360\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\u003e2012-2015 Mercedes Benz M-Class (ML350) 3.5L V6 Gas Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003e2012-2015 Mercedes Benz M-Class (ML350) 3.5L V6 Flex Fuel Naturally Aspirated\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 W166 M-Class?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2012-2015 Mercedes Benz M-Class equipped with the \u003cstrong\u003eM276\u003c\/strong\u003e naturally aspirated 3.5L engine. \u003cstrong\u003eThis kit does not fit turbocharged V6 (ML400), V8 models (ML550\/ML63), or Bluetec diesel variants.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to vacuum bleed the cooling system after installation?\u003c\/h4\u003e\n\u003cp\u003eYes, refilling the \u003cstrong\u003eM276\u003c\/strong\u003e engine requires a cooling system vacuum bleeder to purge trapped air pockets that lead to localized hot spots.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to exact German technical specifications, these components restore factory operating temperatures and factory accessory drive balance without triggering diagnostic trouble codes or instrument cluster warnings.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67923740360952,"sku":"DS-ENMPP44KK","price":174.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-water-pump-kit-for-mercedes-benz-m-class-2012-2015-3-5l-1.jpg?v=1793569029","url":"https:\/\/performancechiptuning.com\/es\/products\/performance-water-pump-kit-for-mercedes-benz-m-class-2012-2015-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}