{"product_id":"delphi-tc3991-suspension-control-arm-and-ball-joint-assembly-front-left-lower","title":"Delphi TC3991 Suspension Control Arm and Ball Joint Assembly - Front Left Lower","description":"\u003ch2\u003eDelphi TC3991 Front Left Lower Control Arm\u003c\/h2\u003e\u003cp\u003eDelphi TC3991 is a front left lower suspension control arm and ball joint assembly built for the 2018-2021 Honda Accord. It combines an aluminum control arm, pre-greased components, and a bolt-in ball joint for a direct replacement on the front left lower position.\u003c\/p\u003e\u003cp\u003eEngineered with Delphi OE-focused dimensional and material analysis, this part is built for accurate fitment on the Honda Accord and consistent steering and suspension performance. The Delphi TC3991 is a practical choice when replacing worn front suspension components on 2018-2021 Honda Accord models.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits 2018-2021 Honda Accord, front left lower\u003c\/li\u003e\n\u003cli\u003ePart number: TC3991\u003c\/li\u003e\n\u003cli\u003eAluminum control arm with casting\/forged construction\u003c\/li\u003e\n\u003cli\u003eBall joint included with threaded stud and bolt-in mounting type\u003c\/li\u003e\n\u003cli\u003ePre-greased with bushings, dust boot, and mounting hardware included\u003c\/li\u003e\n\u003cli\u003eBlack rubber bushings and chloroprene rubber dust boot\u003c\/li\u003e\n\u003cli\u003ePremium grade, uncoated finish, gray control arm color\u003c\/li\u003e\n\u003cli\u003eNon-adjustable design for direct replacement service\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eDelphi TC3991 is a suspension control arm and ball joint assembly for the front left lower position on the 2018-2021 Honda Accord. It uses an aluminum arm with a forged\/cast construction, two mounting holes, and a bolt-in ball joint design to match the original suspension layout. The assembly is pre-greased and includes bushings, a dust boot, mounting hardware, and a locking nut for service replacement.\u003c\/p\u003e\u003cp\u003eDelphi applies OE-level dimensional and material analysis to help maintain proper alignment geometry and part compatibility. This part cross-references MOOG Chassis Products RK623747 and Mevotech Supreme CMS601270 for the same application. Search terms such as Honda Accord front left lower control arm, 2018-2021 Honda Accord suspension control arm assembly, and Delphi TC3991 front suspension replacement all point to this direct-fit component.\u003c\/p\u003e\u003ch2\u003eCommon Replacement Reasons\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eClunking or knocking from the front suspension\u003c\/li\u003e\n\u003cli\u003eExcessive play in the lower control arm or ball joint\u003c\/li\u003e\n\u003cli\u003eUneven tire wear caused by worn suspension joints\u003c\/li\u003e\n\u003cli\u003eSteering looseness or wandering on the road\u003c\/li\u003e\n\u003cli\u003eCracked bushings or damaged dust boot material\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eInstall on the front left lower position only. Verify thread direction, mounting hole size, and bushing dimensions against the original part before installation. Because this assembly is non-adjustable, a professional alignment should be performed after replacement on the Honda Accord.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDelphi subjects steering and suspension components to extreme temperature testing below -40 degrees C and above 120 degrees C, along with 720 hours of salt spray exposure. These validation steps support OE-style durability for the Delphi TC3991 on 2018-2021 Honda Accord applications.\u003c\/p\u003e","brand":"Delphi","offers":[{"title":"Default Title","offer_id":52435692388533,"sku":"BBMX-TC3991","price":161.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DE_TC3991_FRO.jpg?v=1777861737","url":"https:\/\/www.partcatalog.com\/products\/delphi-tc3991-suspension-control-arm-and-ball-joint-assembly-front-left-lower","provider":"PartCatalog","version":"1.0","type":"link"}