{"id":822,"date":"2026-11-11T09:05:41","date_gmt":"2026-11-11T14:05:41","guid":{"rendered":"https:\/\/www.masonsautostore.com\/part\/genuine-subaru-thermostat-for-2015-2019-subaru-outback-2-5l-boxer-4-fb25-oem-21210aa260\/"},"modified":"2026-11-11T09:39:00","modified_gmt":"2026-11-11T14:39:00","slug":"genuine-subaru-thermostat-for-2015-2019-subaru-outback-2-5l-boxer-4-fb25-oem-21210aa260","status":"publish","type":"product","link":"https:\/\/www.masonsautostore.com\/es\/part\/genuine-subaru-thermostat-for-2015-2019-subaru-outback-2-5l-boxer-4-fb25-oem-21210aa260\/","title":{"rendered":"Genuine Subaru Thermostat for 2015\u20132019 Subaru Outback 2.5L boxer 4 (FB25) (OEM 21210AA260)"},"content":{"rendered":"<h2>Genuine Thermostat for the 2015\u20132019 Subaru Outback with the 2.5L boxer 4 (FB25)<\/h2>\n<p>This is a new, genuine Subaru thermostat with OEM part number <strong>21210AA260<\/strong>, engineered for the <strong>2.5L boxer 4 (FB25)<\/strong> engine in the 2015\u20132019 Subaru Outback. A thermostat stuck open causes slow warm-up and poor heat; stuck closed, it overheats the engine. The genuine part opens at the factory temperature this engine\u2019s management expects. Mason\u2019s Auto Store sells it 31% below the manufacturer\u2019s suggested retail price and ships it across the USA from our Battle Creek, Michigan warehouse.<\/p>\n<p><strong>Catalog fitment notes:<\/strong> 2.5L. Legacy, Outback.<\/p>\n<h3>Specifications<\/h3>\n<table class=\"spec-table\">\n<tr>\n<th>Part type<\/th>\n<td>Thermostat<\/td>\n<\/tr>\n<tr>\n<th>OEM part number<\/th>\n<td>21210AA260<\/td>\n<\/tr>\n<tr>\n<th>Brand<\/th>\n<td>Subaru Genuine<\/td>\n<\/tr>\n<tr>\n<th>Engine<\/th>\n<td>2.5L boxer 4 (FB25)<\/td>\n<\/tr>\n<tr>\n<th>Fits<\/th>\n<td>2015\u20132019 Subaru Outback<\/td>\n<\/tr>\n<tr>\n<th>Condition<\/th>\n<td>New OEM (genuine factory part)<\/td>\n<\/tr>\n<tr>\n<th>Warranty<\/th>\n<td>12 months (manufacturer parts warranty)<\/td>\n<\/tr>\n<\/table>\n<h3>Will it fit my Subaru Outback?<\/h3>\n<p>Engine, trim, drivetrain and production date all affect the correct part number. Confirm your engine on the emissions label under the hood or from the 8th character of your VIN, compare the OEM number 21210AA260 with your old part, or add your 17-digit VIN at checkout \u2014 we verify fitment for free before shipping. Shops and fleets can send a <a href=\"\/es\/bulk-inquiry\/\">bulk inquiry<\/a> for one combined quote.<\/p>\n<h3>Why buy from Mason\u2019s<\/h3>\n<ul>\n<li>Family parts business serving drivers since 1936<\/li>\n<li>Genuine OEM part number and engine shown on every listing<\/li>\n<li>Pay by card, Afterpay, Zelle, Cash App or bank transfer \u2014 ships once payment is confirmed<\/li>\n<li>Optional shipping insurance and 30-day returns on unused parts<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Genuine Subaru thermostat (OEM 21210AA260) for the 2.5L boxer 4 (FB25) in the 2015\u20132019 Subaru Outback. New \u2014 31% below MSRP. Free VIN fitment check.<\/p>","protected":false},"featured_media":949,"comment_status":"open","ping_status":"closed","template":"","meta":{"pagelayer_contact_templates":[],"_pagelayer_content":""},"product_brand":[230],"product_cat":[98,95],"product_tag":[295,108,231,164],"mas_vehicle":[42,41],"mas_condition":[84],"mas_source":[89],"class_list":["post-822","product","type-product","status-publish","has-post-thumbnail","product_brand-subaru-genuine","product_cat-cooling-ac","product_cat-engine-parts","product_tag-engine-2-5l-boxer-4-fb25","product_tag-oem","product_tag-subaru-outback","product_tag-thermostat","mas_vehicle-subaru-outback","mas_vehicle-subaru","mas_condition-oem-new","first","instock","sale","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/product\/822","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/comments?post=822"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/media\/949"}],"wp:attachment":[{"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/media?parent=822"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/product_brand?post=822"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/product_cat?post=822"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/product_tag?post=822"},{"taxonomy":"mas_vehicle","embeddable":true,"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/mas_vehicle?post=822"},{"taxonomy":"mas_condition","embeddable":true,"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/mas_condition?post=822"},{"taxonomy":"mas_source","embeddable":true,"href":"https:\/\/www.masonsautostore.com\/es\/wp-json\/wp\/v2\/mas_source?post=822"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}