{"id":26884,"date":"2026-10-04T22:53:59","date_gmt":"2026-10-05T06:53:59","guid":{"rendered":"https:\/\/tesvx.com\/?post_type=product&p=26884"},"modified":"2026-10-04T23:09:20","modified_gmt":"2026-10-05T07:09:20","slug":"tesla-12v-lead-acid-auxiliary-battery-1129182-00-b-model-3-y","status":"publish","type":"product","link":"https:\/\/tesvx.com\/de\/product\/tesla-12v-lead-acid-auxiliary-battery-1129182-00-b-model-3-y\/","title":{"rendered":"12V Lead-Acid Low-Voltage Battery 1129182-00-B for Tesla Model 3 \/ Model Y"},"content":{"rendered":"
\n
\n

12V 45Ah Lead-Acid Auxiliary Battery for Model 3 and Model Y<\/h3>\n

This 12V 45Ah lead-acid battery replaces the auxiliary battery on compatible early Model 3 and Model Y vehicles. It serves the low-voltage electrical system and installs in the front trunk battery position. It replaces original battery reference 1129182-00-B.<\/p>\n

    \n
  • 12V<\/li>\n
  • 45Ah<\/li>\n
  • Lead-acid<\/li>\n
  • Reference 1129182-00-B<\/li>\n<\/ul>\n<\/section>\n
    \n

    Hauptmerkmale<\/h4>\n
      \n
    1. \n
      12V Lead-Acid Design<\/h5>\n

      A replacement auxiliary battery for vehicles originally equipped with the matching 12V lead-acid system.<\/p>\n<\/li>\n

    2. \n
      45Ah Capacity<\/h5>\n

      The specified capacity is 45Ah.<\/p>\n<\/li>\n

    3. \n
      Reference Number<\/h5>\n

      Replaces original battery reference 1129182-00-B.<\/p>\n<\/li>\n

    4. \n
      Low-Voltage Supply<\/h5>\n

      Serves the vehicle low-voltage electrical system, including control modules, locks and lighting.<\/p>\n<\/li>\n

    5. \n
      Original Battery Position<\/h5>\n

      Installed in the front trunk battery location using the correct vehicle procedure and retaining hardware.<\/p>\n<\/li>\n

    6. \n
      Lead-Acid Vehicles Only<\/h5>\n

      Fits vehicles with a factory lead-acid low-voltage battery. Does not fit lithium-ion low-voltage systems.<\/p>\n<\/li>\n<\/ol>\n<\/section>\n

      \n

      Highlights<\/h4>\n
      \"Low-Voltage
      \n
      Low-Voltage Battery Replacement<\/h5>\n

      A single lead-acid auxiliary battery for the matching factory system. The battery supplies low-voltage vehicle equipment; replacing it does not increase high-voltage traction battery capacity or driving range.<\/p>\n<\/figcaption><\/figure>\n

      \n
      Original Battery Position<\/h5>\n

      Replaces the original 1129182-00-B battery in the front trunk battery position.<\/p>\n<\/figcaption><\/figure>\n

      \n
      Battery Type<\/h5>\n

      Open Controls > Software > Additional Vehicle Information to see the low-voltage battery type. This battery replaces lead-acid batteries only.<\/p>\n<\/figcaption><\/figure>\n

      \n
      Installation for the Exact Vehicle<\/h5>\n

      Battery access and power-isolation procedures vary with vehicle equipment and production version.<\/p>\n<\/figcaption><\/figure>\n<\/section>\n

      \n

      Kompatibilit\u00e4t<\/h4>\n
      \n\n\n\n\n\n\n
      Modell<\/th>\nYears \/ Version<\/th>\nHinweise<\/th>\n<\/tr>\n<\/thead>\n
      Model 3<\/td>\n2017\u20132021<\/td>\nFactory lead-acid version only; replaces reference 1129182-00-B.<\/td>\n<\/tr>\n
      Model Y<\/td>\n2020\u20132021<\/td>\nFactory lead-acid version only; replaces reference 1129182-00-B.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      Production transitions vary by factory. Fits factory lead-acid versions only. Excludes lithium-ion low-voltage systems, Model 3 Highland, Model Y Juniper, Model S and Model X.<\/p>\n<\/section>\n

      \n

      Technische Daten<\/h4>\n
      \n\n\n\n\n\n\n\n\n\n\n
      Produkttyp<\/th>\nLow-voltage auxiliary battery<\/td>\n<\/tr>\n
      Compatible Models<\/th>\nModel 3 2017\u20132021 and Model Y 2020\u20132021, factory lead-acid versions only<\/td>\n<\/tr>\n
      Position \/ Location<\/th>\nFront trunk battery position<\/td>\n<\/tr>\n
      Kapazit\u00e4t<\/th>\n45Ah<\/td>\n<\/tr>\n
      Spannung<\/th>\n12V<\/td>\n<\/tr>\n
      Lieferumfang<\/th>\n1 \u00d7 low-voltage battery<\/td>\n<\/tr>\n
      Battery Chemistry<\/th>\nLead-acid<\/td>\n<\/tr>\n
      Reference Part Number<\/th>\n1129182-00-B<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
      \n

      What's in the Box<\/h4>\n
        \n
      • 1\u00d7<\/b>12V low-voltage battery<\/li>\n<\/ul>\n<\/section>\n
        \n

        Installation<\/h4>\n
          \n
        1. Prepare access and isolate vehicle power using the procedure for the exact vehicle configuration; use appropriate protective equipment and prevent terminal short circuits.<\/li>\n
        2. Remove and replace the battery following that procedure, retaining the correct hold-down and restoring the required vent hose and plug arrangement.<\/li>\n
        3. Restore vehicle power and panels as specified.<\/li>\n<\/ol>\n<\/section>\n
          \n

          Gut zu wissen<\/h4>\n
          \n
          \n
          Achtung<\/span><\/h5>\n
            \n
          • Use only on a matching factory lead-acid low-voltage system; do not substitute it for a lithium-ion battery.<\/li>\n
          • Keep the battery upright, protect its terminals and recycle the old battery through an appropriate collection facility.<\/li>\n<\/ul>\n<\/div>\n
            \n
            Pflege<\/span><\/h5>\n
              \n
            • Keep the battery upright when handling or transporting it, and protect its terminals from contact with tools or metal objects.<\/li>\n
            • Follow battery handling instructions and local recycling requirements; use a battery collection facility for the old battery.<\/li>\n
            • A low-voltage warning can have several causes. Diagnose the vehicle before assuming a replacement battery will resolve every wake-up, locking or charging problem.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n
              \n

              FAQ<\/h4>\n
              \nWill it fit every 2021 Model 3 or Model Y?<\/summary>\n

              No. It fits 2021 vehicles with a factory lead-acid low-voltage battery only. Vehicles with lithium-ion low-voltage batteries require a different replacement.<\/p>\n<\/details>\n

              \nIs this a lithium-ion conversion?<\/summary>\n

              This is a 12V lead-acid replacement for a matching factory lead-acid system. It is not a conversion kit for another low-voltage architecture.<\/p>\n<\/details>\n

              \nWhat if the vehicle has no low-voltage power?<\/summary>\n

              Hood-release power connections are not battery-charging connections.<\/p>\n<\/details>\n

              \nWill this increase driving range?<\/summary>\n

              It replaces the low-voltage auxiliary battery. It does not add capacity to the high-voltage traction battery.<\/p>\n<\/details>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"

              12V 45Ah Lead-Acid Auxiliary Battery for Model 3 and Model Y This 12V 45Ah lead-acid battery replaces the auxiliary battery on compatible early Model 3 and Model Y vehicles. It serves the low-voltage electrical system and installs in the front trunk battery position. It replaces original battery reference 1129182-00-B. 12V 45Ah Lead-acid Reference 1129182-00-B Key […]<\/p>\n","protected":false},"featured_media":17995,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":""},"product_brand":[127],"product_cat":[734],"product_tag":[369,370,260,261,262,263,264,371,276,278,303],"class_list":["post-26884","product","type-product","status-publish","has-post-thumbnail","product_brand-autoboss","product_cat-accessories-battery","product_tag-1129182-00-b","product_tag-12v-lead-acid-battery","product_tag-260","product_tag-261","product_tag-262","product_tag-263","product_tag-264","product_tag-lead-acid","product_tag-model-3","product_tag-model-y","product_tag-parts","first","instock","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/tesvx.com\/de\/wp-json\/wp\/v2\/product\/26884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tesvx.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/tesvx.com\/de\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/tesvx.com\/de\/wp-json\/wp\/v2\/comments?post=26884"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tesvx.com\/de\/wp-json\/wp\/v2\/media\/17995"}],"wp:attachment":[{"href":"https:\/\/tesvx.com\/de\/wp-json\/wp\/v2\/media?parent=26884"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/tesvx.com\/de\/wp-json\/wp\/v2\/product_brand?post=26884"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/tesvx.com\/de\/wp-json\/wp\/v2\/product_cat?post=26884"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/tesvx.com\/de\/wp-json\/wp\/v2\/product_tag?post=26884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}