{"product_id":"inmotion-ws473823-axle-differential-seal-front-rear-or-rear-inner","title":"InMotion WS473823 Axle Differential Seal - Front, Rear or Rear Inner","description":"\u003ch2\u003eAxle Differential Seal for BMW and More\u003c\/h2\u003e\u003cp\u003eThe InMotion WS473823 axle differential seal is built with nitrile sealing material to help maintain a secure barrier at the differential pinion area. It is engineered to reduce fluid leakage and keep contaminants such as moisture and debris out of sensitive internal components.\u003c\/p\u003e\u003cp\u003eWith precise dimensions and broad vehicle coverage, this differential pinion seal supports rear differential service on select BMW applications, along with additional transmission and axle applications across Suzuki, Chevrolet, Nissan, Mazda, Ford, Kia, and Geo models.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eNitrile sealing material for dependable fluid control\u003c\/li\u003e\n\u003cli\u003eInside diameter: 1.378 in.\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 2.172 in.\u003c\/li\u003e\n\u003cli\u003eThickness and width: 0.315 in.\u003c\/li\u003e\n\u003cli\u003eHousing bore: 2.165 in.\u003c\/li\u003e\n\u003cli\u003eShaft diameter: 1.378 in.\u003c\/li\u003e\n\u003cli\u003eDesigned for rear differential pinion sealing and select rear inner applications\u003c\/li\u003e\n\u003cli\u003ePart number: WS473823\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Overview\u003c\/h2\u003e\u003cp\u003eInMotion WS473823 is a precision-fit axle differential seal intended for service work where a tight seal is critical to drivetrain reliability. The nitrile construction helps resist fluid seepage while maintaining contact around the shaft and housing bore dimensions listed above. For BMW rear differential service, this seal is listed for applications including BMW 188K and BMW 188N differential configurations, making it a practical choice for common rear differential repairs on models such as the BMW 323i, 328i, 335i, X3, X5, Z4, and related vehicles.\u003c\/p\u003e\u003cp\u003eThis part number, WS473823, also appears in transmission and axle-related fitments such as the Aisin 03-72LE transmission and rear inner seal applications. If you are servicing a BMW 328i rear differential seal, BMW X5 rear differential seal, or a Nissan Pathfinder rear inner seal, confirm the differential or transmission configuration before installation.\u003c\/p\u003e\u003ch2\u003eCommon Problems This Seal Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDifferential fluid leaking from the pinion area\u003c\/li\u003e\n\u003cli\u003eContamination entering the differential housing\u003c\/li\u003e\n\u003cli\u003eSeal wear from age, heat, or fluid breakdown\u003c\/li\u003e\n\u003cli\u003eMoisture intrusion around drivetrain sealing surfaces\u003c\/li\u003e\n\u003cli\u003eService replacement during differential maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the differential type, housing bore, and shaft diameter before installation. Clean the sealing surface thoroughly and inspect the pinion area for wear, scoring, or contamination that could affect seal life. Proper installation depth and alignment are important for a reliable seal on BMW rear differential applications and other listed fitments.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with select BMW 188K and 188N differential applications\u003c\/li\u003e\n\u003cli\u003eAlso listed for Aisin 03-72LE transmission and rear inner seal service\u003c\/li\u003e\n\u003cli\u003eConfirm year, make, model, position, and notes against the vehicle before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eInMotion manufactures this seal with precision-focused construction and high-quality nitrile material to support consistent sealing performance in drivetrain service. The design emphasizes contaminant resistance and leak control for long-term differential protection.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFits 2006-2009 BMW 323i, rear, with BMW 188K Differential\u003c\/li\u003e\n\u003cli\u003eFits 2007-2009 BMW 328i, rear, with BMW 188K Differential\u003c\/li\u003e\n\u003cli\u003eFits 2007-2009 BMW 335i, rear, with BMW 188N Differential\u003c\/li\u003e\n\u003cli\u003eFits 2004-2009 BMW X3, rear, with BMW 188K Differential\u003c\/li\u003e\n\u003cli\u003eFits 2000-2009 BMW X5, rear, with BMW 188K Differential\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"InMotion","offers":[{"title":"Default Title","offer_id":52409522553013,"sku":"HKKS-WS473823","price":10.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/WJ_WS473823_Fro.jpg?v=1777783515","url":"https:\/\/www.partcatalog.com\/products\/inmotion-ws473823-axle-differential-seal-front-rear-or-rear-inner","provider":"PartCatalog","version":"1.0","type":"link"}