{"product_id":"for-peterbilt-air-spring-bag-w01-358-8864-wa01-8864c","title":"For Peterbilt Air Spring Bag – W01-358-8864 \/ WA01-8864C","description":"\u003cp\u003eRestore and upgrade your truck suspension with the \u003cstrong\u003eROADWEST W01-358-8864 Air Spring Bag\u003c\/strong\u003e, engineered as a heavy-duty replacement for selected \u003cstrong\u003ePeterbilt and Kenworth\u003c\/strong\u003e air ride systems. This suspension bag is designed to match cross reference numbers \u003cstrong\u003eW01-358-8864\u003c\/strong\u003e and \u003cstrong\u003eWA01-8864C\u003c\/strong\u003e, ensuring a reliable fit when correctly matched to your existing part.\u003c\/p\u003e\n\u003cp\u003eConstructed from \u003cstrong\u003eimported high-density rubber\u003c\/strong\u003e with multi-ply bellows, the ROADWEST air spring exceeds typical OEM requirements. It offers \u003cstrong\u003ebetter durability, higher load capacity and longer service life\u003c\/strong\u003e than many standard air suspension bags, helping your truck maintain proper ride height and stability under varying loads.\u003c\/p\u003e\n\u003cp\u003eBy effectively \u003cstrong\u003eabsorbing shocks and vibrations\u003c\/strong\u003e, this air spring bag helps reduce physical impact transmitted to the cab and chassis. The result is \u003cstrong\u003eimproved ride comfort, reduced driver fatigue and more stable braking\u003c\/strong\u003e, especially on rough roads or under heavy loads.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect replacement\u003c\/strong\u003e – designed to replace air springs using cross reference numbers \u003cstrong\u003eW01-358-8864\u003c\/strong\u003e and \u003cstrong\u003eWA01-8864C\u003c\/strong\u003e on selected Peterbilt and Kenworth trucks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium air ride construction\u003c\/strong\u003e – high-density rubber bellows and reinforced piston\/base help deliver excellent load support and long-lasting performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety \u0026amp; comfort\u003c\/strong\u003e – air spring bags help prevent harsh collision impacts, reduce the risk of passenger injury and improve braking stability by smoothing road vibrations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter driving experience\u003c\/strong\u003e – smoother ride, less bounce and more controlled handling after worn or leaking air bags are replaced.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy installation\u003c\/strong\u003e – when matched by part number, this bag is designed as a direct replacement, typically without major modifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty support\u003c\/strong\u003e – includes a 1-year warranty and 100% quality assurance for added peace of mind.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eKey air spring structure:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston\u003c\/strong\u003e – the lower section of the air spring, made from aluminium, steel or composite plastic, providing the lower mounting arrangement with threaded holes or studs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGirdle hoop (centre ring)\u003c\/strong\u003e – ring between the convolutions of a convoluted-type air spring that helps maintain shape and stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBellows\u003c\/strong\u003e – the heart of the air spring, built from at least four layers: an inner layer, two plies of cord-reinforced fabric and an outer protective layer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBumper (bump stop)\u003c\/strong\u003e – solid moulded rubber fail-safe device used on many suspension applications to help protect the vehicle and suspension in the event of sudden air pressure loss.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment reminder:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThis is \u003cstrong\u003enot a universal air spring\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eAlways confirm the \u003cstrong\u003epart number on your original air bag\u003c\/strong\u003e or suspension specification before ordering.\u003c\/li\u003e\n\u003cli\u003eOnly purchase if your existing air spring matches one of these numbers: \u003cstrong\u003eW01-358-8864\u003c\/strong\u003e or \u003cstrong\u003eWA01-8864C\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eIf unsure, consult your mechanic or parts manager to verify compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eROADWEST\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Type\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eSuspension Air Spring Bag \/ Air Ride\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVehicle Make\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003ePeterbilt \u0026amp; Kenworth (using listed cross reference numbers)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCross Reference\u003c\/th\u003e\n\u003ctd\u003e\n\u003cstrong\u003eW01-358-8864\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWA01-8864C\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eCross numbers are for reference only – verify before purchase.\u003c\/em\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication Position\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eSuspension air spring (air ride bag)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh-density multi-ply rubber bellows with reinforced piston\/base\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eSupports vehicle load, absorbs shock \u0026amp; vibration, improves ride comfort and braking stability\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFit Type\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eVehicle Specific Fit – match by OE \/ cross reference numbers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor \/ Finish\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eBlack air spring assembly\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded Components\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003e1 × Air Spring Bag (replacement for W01-358-8864 \/ WA01-8864C)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003e1 Year Limited Warranty against manufacturing defects\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIf you are not sure whether this air spring fits your suspension, please confirm your original part number or consult a professional technician before purchasing.\u003c\/p\u003e","brand":"ROADWEST","offers":[{"title":"Default Title","offer_id":41859837689959,"sku":"YY-338-05","price":91.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7612\/3239\/files\/PeterbiltKenworthAirSpringBag_ReplacesW01-358-8864WA01-8864C_4.webp?v=1772171630","url":"https:\/\/roadwesttruckparts.com\/products\/for-peterbilt-air-spring-bag-w01-358-8864-wa01-8864c","provider":"RoadWest Truck Parts","version":"1.0","type":"link"}