{"product_id":"performance-water-pump-thermostat-kit-for-jaguar-xj-2013-2019-3-0l","title":"Performance Water Pump \u0026 Thermostat Kit for Jaguar XJ (2013-2019) 3.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Water Pump \u0026amp; Thermostat Cooling Overhaul Kit for 2013-2019 Jaguar XJ (X351)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Water Pump \u0026amp; Thermostat Kit replaces failure-prone plastic cooling conduits and worn pump components on the 2013-2019 Jaguar XJ to eliminate catastrophic coolant loss and maintain critical engine operating temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Jaguar XJ Cooling System Failure Points\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAJ126\u003c\/strong\u003e 3.0L supercharged V6 under the hood of the \u003cstrong\u003eX351\u003c\/strong\u003e chassis generates intense underhood thermal loads. Factory cooling systems rely on multi-piece molded plastic coolant crossover pipes routed beneath the supercharger. Over continuous heat cycles, these plastic passages degrade, embrittle, and rupture along their ultrasonic welded seams. Compounding this risk, factory water pump shaft seals are prone to weeping, and brittle plastic bleeder screws frequently shear during routine service, causing rapid loss of cooling pressure and catastrophic cylinder head warping.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive cooling overhaul kit permanently resolves OEM vulnerabilities by replacing brittle plastic cooling bridges with rigid aluminum coolant crossover pipes engineered to withstand severe thermal expansion without cracking. The direct-fit replacement water pump features reinforced bearing assemblies and upgraded shaft seals to handle continuous high-RPM water jacket pressures. A brand-new thermostat assembly with an integrated sensor ensures immediate, accurate thermal regulation, while durable copper bleeder hardware and copper hose fittings replace brittle OEM plastic connectors for permanent, leak-free reliability.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Water Pump\u003c\/li\u003e\n  \u003cli\u003e1x Thermostat with Integrated Temperature Sensor\u003c\/li\u003e\n  \u003cli\u003e1x Upgraded Aluminum Coolant Crossover Pipe Assembly\u003c\/li\u003e\n  \u003cli\u003e1x Thermostat Outlet Hose with Copper Fittings\u003c\/li\u003e\n  \u003cli\u003e1x Copper Bleeder Screw \u0026amp; Crossover Plug\u003c\/li\u003e\n  \u003cli\u003e1x Heater Outlet Hose\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;\"\u003e2013-2019 Jaguar XJ\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;\"\u003e\n\u003cstrong\u003eAJ126\u003c\/strong\u003e 3.0L Supercharged V6 \/ \u003cstrong\u003eX351\u003c\/strong\u003e\n\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;\"\u003e340 hp \/ 332 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;\"\u003e\n\u003cstrong\u003eAJ812119\u003c\/strong\u003e, \u003cstrong\u003eAJ813909\u003c\/strong\u003e, \u003cstrong\u003eC2D20660\u003c\/strong\u003e, \u003cstrong\u003eLR090630\u003c\/strong\u003e\n\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\u003e2013-2019 Jaguar XJ 3.0L V6 Supercharged (X351)\u003c\/li\u003e\n  \u003cli\u003eFits AJ126 3.0L Supercharged V6 and select AJ133 5.0L Supercharged V8 applications matching listed OEM references\u003c\/li\u003e\n  \u003cli\u003eDoes not fit naturally aspirated engine variants\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 X351 XJ?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2013-2019 Jaguar XJ equipped with the \u003cstrong\u003eAJ126\u003c\/strong\u003e 3.0L Supercharged V6 engine. \u003cstrong\u003eThis kit does not fit naturally aspirated engines; always verify that your original part numbers match before installation.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eIs vacuum-assisted coolant bleeding required after installation?\u003c\/h4\u003e\n\u003cp\u003eYes, due to the complex cooling jacket routing beneath the supercharger on the \u003cstrong\u003eAJ126\u003c\/strong\u003e, a vacuum refill and thorough cooling system bleed are required to prevent trapped air pockets from causing localized hot spots.\u003c\/p\u003e\n\n\u003ch3\u003eThe Jaguar Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to exact European performance tolerances, this upgraded cooling kit delivers absolute thermal stability, zero check-engine warnings, and complete peace of mind on the highway or in heavy traffic.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67545307414776,"sku":"DS-EEF977HQA","price":246.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-water-pump-thermostat-kit-for-jaguar-xj-2013-2019-3-0l-1.jpg?v=1790721347","url":"https:\/\/performancechiptuning.com\/products\/performance-water-pump-thermostat-kit-for-jaguar-xj-2013-2019-3-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}