{"product_id":"bmw-rear-differential-bearing-seal-rebuild-kit-restores-differential-performance-eliminates-drivetrain-noise-e38-e39-e46-stc4690","title":"BMW Rear Differential Bearing \u0026 Seal Rebuild Kit – OEM Drivetrain Rebuild Replacement for E38, E39 \u0026 E46 Models | Fits STC4690 Applications","description":"\u003cp class=\"p1\"\u003e\u003cstrong\u003eRestore smooth and reliable rear differential operation with this premium Rear Differential Bearing and Seal Rebuild Kit for select BMW 3 Series, 5 Series, and 7 Series models. Designed for differential overhaul and repair applications, this kit includes the essential bearings, seals, and service components needed to rebuild worn rear differential assemblies and restore proper drivetrain performance.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eOver time, differential bearings and seals can wear due to mileage, heat, load stress, and fluid contamination. Common symptoms include whining noises, vibration, gear noise during acceleration or deceleration, fluid leaks, and excessive drivetrain play. Replacing worn differential components helps restore smooth operation, reduce noise, and extend the service life of the differential assembly.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eManufactured to OEM-style specifications, this rebuild kit is engineered for precise fitment, durability, and dependable performance. The included bearings and seals are designed to withstand demanding operating conditions while maintaining proper gear alignment and lubrication.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eWhether you are performing a complete differential rebuild, repairing drivetrain noise, or restoring rear axle performance, this comprehensive kit provides the essential components required for a professional-quality repair.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eComplete Rear Differential Bearing and Seal Rebuild Kit: Includes the essential service components needed to rebuild and refresh worn rear differential assemblies.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eRestores Differential Performance and Reliability: Helps bring back smoother operation and improved drivetrain stability.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eHelps Eliminate Differential Whining and Drivetrain Noise: Ideal for addressing common wear-related rear-end noise and vibration.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eSupports Proper Gear Alignment and Operation: Fresh bearings and seals help maintain correct internal differential function.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eHelps Prevent Differential Fluid Leaks: Replacing worn seals helps protect the differential from oil loss and contamination.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eOEM-Style Fitment and Quality: Designed for dependable fitment and rebuild performance on compatible BMW applications.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDurable Bearing and Seal Construction: Built to withstand heat, load, and long-term drivetrain stress.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eIdeal for Differential Rebuilds and Repairs: A smart solution for noisy, leaking, or aging rear axle differentials.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFITMENT:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBMW 3 Series – E46 (1999–2006)\u003cbr\u003eCompatible with 320i, 323i, 325i, 328i, and 330i models.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eBMW 5 Series – E39 (1996–2003)\u003cbr\u003eCompatible with 520i, 523i, 525i, 528i, and 530i models.\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eBMW 7 Series – E38 (1994–2001)\u003cbr\u003eCompatible with 728i, 730i, and 740i models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003ePosition:\u003c\/strong\u003e Rear Axle Differential Assembly\u003c\/p\u003e\n\u003cp class=\"p1\"\u003ePlease verify your vehicle fitment, differential type, and existing component configuration before purchasing.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eFits Reference:\u003c\/strong\u003e\u003cbr\u003eSTC4690\u003cbr\u003eST4690-3\u003c\/p\u003e","brand":"BAVMODS®","offers":[{"title":"Default Title","offer_id":47689357164734,"sku":null,"price":121.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/8788\/1150\/files\/S8992a57331e74d81ac0ecf757ea199eaq_jpg_960x960q75_jpg.avif?v=1782356396","url":"https:\/\/bavmods.com\/products\/bmw-rear-differential-bearing-seal-rebuild-kit-restores-differential-performance-eliminates-drivetrain-noise-e38-e39-e46-stc4690","provider":"BAVMODS®","version":"1.0","type":"link"}