{"product_id":"dorman-540-123-suspension-ball-joint-rear-upper","title":"Dorman 540-123 Suspension Ball Joint - Rear Upper","description":"\u003ch2\u003eDorman 540-123 Rear Upper Ball Joint\u003c\/h2\u003e\u003cp\u003eDorman 540-123 is a threaded suspension ball joint built as a standard replacement for the original equipment design on specific vehicles. It is precision-engineered and tested for reliable service on 1999-2004 Jeep Grand Cherokee rear upper suspension applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eStandard replacement suspension ball joint for OE-style service\u003c\/li\u003e\n\u003cli\u003eThreaded design with tapered stud for secure suspension connection\u003c\/li\u003e\n\u003cli\u003eSteel construction with grey finish\u003c\/li\u003e\n\u003cli\u003eDust boot included to help protect the joint area\u003c\/li\u003e\n\u003cli\u003eMounting hardware included\u003c\/li\u003e\n\u003cli\u003eFits 1999-2004 Jeep Grand Cherokee, rear upper\u003c\/li\u003e\n\u003cli\u003ePart number 540-123 for catalog and fitment lookup\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Dorman suspension ball joint is designed for rear upper use on the 1999-2004 Jeep Grand Cherokee. The steel body, threaded mounting style, and tapered stud support a direct replacement approach for worn OE components. Dorman 540-123 also includes a dust boot and mounting hardware, while omitting a grease fitting for a sealed, standard-service design. For buyers searching for a rear upper ball joint for Jeep Grand Cherokee 1999-2004, this part number 540-123 matches the listed application.\u003c\/p\u003e\u003cp\u003eThis part cross-references MOOG Chassis Products K7450 for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Problems It Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eClunking or knocking from the rear suspension\u003c\/li\u003e\n\u003cli\u003eExcessive play in the rear upper suspension joint\u003c\/li\u003e\n\u003cli\u003eUneven tire wear related to suspension looseness\u003c\/li\u003e\n\u003cli\u003eSteering or handling instability caused by worn suspension hardware\u003c\/li\u003e\n\u003cli\u003eNoise from a deteriorated ball joint dust boot area\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the vehicle application before installation: Fits 1999-2004 Jeep Grand Cherokee, rear upper. Confirm the threaded mounting style, stud type, and dimensions against the removed part before pressing or bolting the new joint into place. Use the correct 12 mm wrench size for service operations, and inspect the surrounding suspension components for wear that could affect alignment or joint life. Part number 540-123 should be matched to the exact rear upper position listed in the fitment data.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman states this suspension ball joint is precision-engineered and rigorously tested to provide a reliable OE replacement on the specified vehicles. The part is built to standard suspension grade specifications for direct-fit service on the listed Jeep Grand Cherokee applications.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52763282571445,"sku":"BKKY-540-123","price":53.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_540123_Bac.jpg?v=1783147562","url":"https:\/\/www.partcatalog.com\/products\/dorman-540-123-suspension-ball-joint-rear-upper","provider":"PartCatalog","version":"1.0","type":"link"}