{"product_id":"performance-water-pump-kit-for-subaru-baja-2003-2006-2-5l","title":"Performance Water Pump Kit for Subaru Baja (2003-2006) 2.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Water Pump Kit for 2003-2006 Subaru Baja (BT)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Water Pump Kit refreshes the primary cooling loop on the 2003-2006 Baja to eliminate bearing play, restore continuous fluid velocity, and protect horizontal boxer head gaskets from thermal runaway.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Subaru Baja Cooling Vulnerabilities\u003c\/h3\u003e\n\u003cp\u003eThe naturally aspirated \u003cstrong\u003eEJ25\u003c\/strong\u003e boxer engine runs opposing horizontal cylinder banks that are notoriously vulnerable to uneven thermal expansion. High-mileage factory pumps suffer from unitized bearing fatigue, shaft seal degradation leading to shaft weep leakage, and cavitation-induced impeller wear. Furthermore, the factory wax-pellet thermostat often suffers from hysteresis drift or sticks closed, generating sudden localized boiling in the cylinder heads. Because the water pump is driven directly off the timing belt assembly, mechanical bearing seizure risks catastrophic timing belt failure and total valvetrain destruction.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis cooling refresh assembly features a precision cast-aluminum housing matched precisely to factory coolant galleys to prevent flow restriction and cavitation. Equipped with a heavy-duty unitized shaft seal and precision-ground bearing assembly, it withstands timing belt tension without deflection. Paired with a calibrated mechanical wax-pellet thermostat and precision-molded gasket seals, this kit maintains optimal hydraulic pressure across both cylinder heads, mitigating hot spots and stabilizing coolant operating temperatures under heavy duty cycles.\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\u003c\/li\u003e\n  \u003cli\u003e1 Thermostat Seal\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: solid font-size: min-width:\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;\"\u003e2003-2006 Subaru Baja\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;\"\u003eEJ25 SOHC \/ BT\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;\"\u003e165 hp \/ 166 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;\"\u003e21111AA000, 21111AA001, 21111AA002, 21111AA003, 21111AA004, 21111AA005, 21111AA006, 21111AA007, 21111AA011, 21111AA110, 21200AA071, 21200AA072, AW9223, WP777, US9223, CP9223, NP1487, PA786, VKPC99407\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\u003eSubaru Baja: 2.5L Gas SOHC Naturally Aspirated (2003, 2004, 2005, 2006)\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 BT Baja?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2003-2006 Subaru Baja equipped with the \u003cstrong\u003eEJ25\u003c\/strong\u003e naturally aspirated SOHC engine. \u003cstrong\u003eNote: This kit is strictly for naturally aspirated engines and is not compatible with turbocharged WRX, STI, Baja Turbo, or Legacy GT models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to bleed the cooling system after installing this pump?\u003c\/h4\u003e\n\u003cp\u003eYes, Subaru boxer engines easily trap air in the horizontal cylinder banks; a thorough burping procedure with a spill-free funnel is required to prevent air pockets from triggering head gasket failures.\u003c\/p\u003e\n\n\u003ch3\u003eThe Subaru Boxer Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eSubaru utility vehicles demand rock-solid thermal stability to handle diverse terrain, heavy payloads, and long-haul reliability without compromising the structural integrity of the flat-four powerplant.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67923273875704,"sku":"DS-EWHRO8WTH","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-water-pump-kit-for-subaru-baja-2003-2006-2-5l-1.jpg?v=1793557414","url":"https:\/\/performancechiptuning.com\/de\/products\/performance-water-pump-kit-for-subaru-baja-2003-2006-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}