{"product_id":"front-left-lower-control-arm-w-ball-joint-bushing-cast-iron-fit","title":"Front Left Lower Control Arm w Ball Joint \u0026 Bushing - Cast Iron Fit","description":"\u003cp\u003eIn this review the Metrix Premium Front Left Lower Control Arm is assessed for owners of older BMW models who need a durable, direct-replacement suspension component. Our review finds the part best for DIY mechanics and independent shops because it is supplied pre-greased, built from cast iron, and specified to match OE fitment across a wide range of 1992 to 2002 BMW models. The single biggest reason to consider this control arm is its stated adherence to higher manufacturing standards, with IATF 16949 and ISO 9001 certifications that suggest reliability over a plain aftermarket alternative.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide model compatibility:\u003c\/strong\u003e Covers many BMW sedans, coupes, convertibles and Z3 models from 1992 through 2002, reducing the chance of fitment surprises for older chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-greased assembly:\u003c\/strong\u003e Shipped pre-greased to save installation time and help ensure smooth initial movement and reduced break-in wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCast iron construction:\u003c\/strong\u003e Offers a robust, heavy-duty material choice that resists bending under normal road loads for the chassis types listed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOE interchange numbers included:\u003c\/strong\u003e Matches known OE references such as RK80531 and 31121094275, which aids cross-referencing with factory or service manuals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality certifications:\u003c\/strong\u003e Manufactured under IATF 16949 and ISO 9001 processes so purchasers can expect consistent build standards versus unverified parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty backing:\u003c\/strong\u003e Comes with a 3 year \/ 36,000 mile limited warranty from installation for added peace of mind on wear-related issues.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis control arm is aimed at owners of older BMW models listed in the compatibility notes who want a long-lasting, direct-replacement suspension arm with a pre-greased ball joint and bushing. It suits DIY enthusiasts comfortable with front suspension work and independent garages performing routine chassis refreshes.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include owners of modern BMWs outside the listed years or drivers seeking lighter-weight aftermarket performance arms; the cast iron construction favors durability over weight savings or track-focused geometry changes.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood fitment across many BMW models, minimizing the need to hunt for an exact match.\u003c\/li\u003e\n\u003cli\u003ePre-greased ball joint and bushing reduce installation prep time and initial wear.\u003c\/li\u003e\n\u003cli\u003eManufactured to IATF 16949 and ISO 9001 standards, indicating consistent quality control.\u003c\/li\u003e\n\u003cli\u003eThree year \/ 36,000 mile limited warranty provides coverage after installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCast iron construction increases weight compared with some aftermarket aluminum options, which may be a concern for performance-focused builds.\u003c\/li\u003e\n\u003cli\u003eNot intended for vehicles outside the listed fitment, so verification before purchase is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eMETRIX PREMIUM CHASSIS PARTS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCast Iron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity in box\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOE \/ Interchange\u003c\/td\u003e\n\u003ctd\u003eRK80531, CMK80531, 520-739, 31121094275\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility highlights\u003c\/td\u003e\n\u003ctd\u003eBMW 318i\/318is\/318ti, 320i, 323i\/323is\/323iC, 325i, 328i\/328is\/328iC, Z3 (1992-2002)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eIATF 16949, ISO 9001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e3 Year \/ 36,000 miles Limited Warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Metrix Premium front left lower control arm is a practical, value-oriented replacement for owners of compatible BMWs who need a reliable OE-style part that arrives pre-greased and backed by quality certifications. It is a sensible buy for routine chassis repairs and restoration work where durability and correct fit matter more than weight savings or performance tuning adjustments.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my 1999 BMW 328i convertible?\u003c\/strong\u003e\u003cbr\u003eYes, the control arm lists compatibility with the 1999 BMW 328i convertible as one of the covered models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the ball joint pre-greased?\u003c\/strong\u003e\u003cbr\u003eYes, the assembly is supplied pre-greased to aid installation and reduce initial wear.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat warranty does this part include?\u003c\/strong\u003e\u003cbr\u003eMetrix provides a 3 year \/ 36,000 mile limited warranty from the date of installation.\u003c\/p\u003e","brand":"METRIX PREMIUM CHASSIS PARTS","offers":[{"title":"Default Title","offer_id":48609809891547,"sku":"B09316XW3M","price":81.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/615FGBNmr_L._AC_SL1500.jpg?v=1778399937","url":"https:\/\/gearmusthave.com\/products\/front-left-lower-control-arm-w-ball-joint-bushing-cast-iron-fit","provider":"GearMustHave","version":"1.0","type":"link"}