{"product_id":"ppnzqaut-windshield-washer-reservoir-for-peterbilt-1989-2007-replacement-tank-with-pre-installed-pump-cap-heavy-duty-fit","title":"PPNZQAUT windscreen washer reservoir for Peterbilt 1989–2007 — replacement tank with pre-installed pump \u0026 cap, heavy-duty fit","description":"\u003cp\u003e\u003cstrong\u003eThe PPNZQAUT 603-5404 is a heavy-duty replacement windshield washer reservoir assembly—complete with pump and cap—designed to restore washer function on compatible Peterbilt trucks.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your Peterbilt’s washer system no longer holds fluid, sprays poorly, or has a cracked tank, this aftermarket replacement restores the reservoir, pump, and cap in one unit. Built to match the fit and connection points of the original equipment, it replaces part numbers 603-5404, 6035404, and R86-6001 to get your washer system back in working order without sourcing multiple components separately.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this reservoir fit my specific Peterbilt model?\u003c\/h3\u003e\n\u003cp\u003eThis PPNZQAUT reservoir is manufactured to match the fit and mounting points of specified Peterbilt models so it installs in place of the original tank. Fitment covers select years and models—always verify year, make, and model before purchase to ensure compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with 1989–2007 Peterbilt 357\u003c\/li\u003e\n  \u003cli\u003eCompatible with 1989–1999 Peterbilt 375\u003c\/li\u003e\n  \u003cli\u003eCompatible with 1989–2007 Peterbilt 377 and 379\u003c\/li\u003e\n  \u003cli\u003eReplaces OEM part numbers 603-5404, 6035404, R86-6001\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat components come with this replacement assembly?\u003c\/h3\u003e\n\u003cp\u003eThe unit ships as a ready-to-install assembly including the molded reservoir, an electric washer pump, and a matching cap. That reduces the need to buy separate pump modules or gaskets and helps simplify the repair process.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-installed washer pump for immediate operation\u003c\/li\u003e\n  \u003cli\u003eMatching threaded cap for a secure seal\u003c\/li\u003e\n  \u003cli\u003eMolded tank body shaped to original mounting locations\u003c\/li\u003e\n  \u003cli\u003eElectrical connector and hose attachment points aligned to OEM layout\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and reliable is this aftermarket replacement?\u003c\/h3\u003e\n\u003cp\u003ePPNZQAUT designs this reservoir from durable materials intended for heavy-duty truck environments. While it is an aftermarket (non-genuine) part, it’s manufactured and tested for fit and performance on the listed Peterbilt applications to ensure long-term service under normal use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRigid molded construction resists cracking and warping\u003c\/li\u003e\n  \u003cli\u003eCorrosion-resistant pump and fittings for extended life\u003c\/li\u003e\n  \u003cli\u003eTested for correct fit and sealed connections\u003c\/li\u003e\n  \u003cli\u003eDesigned to withstand standard road vibration and temperature ranges\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation and what should I prepare?\u003c\/h3\u003e\n\u003cp\u003eInstallation requires removing surrounding components and unfastening the old reservoir’s mounts, hoses, and wiring; the new unit installs in reverse order. If you’re comfortable working with basic truck electrical and fluid lines, you can perform the swap, but professional installation is recommended if you lack tools or experience.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended tools: basic hand tools, pliers, and possibly a small jack or lift\u003c\/li\u003e\n  \u003cli\u003eDrain fluid and disconnect electrical connector before removal\u003c\/li\u003e\n  \u003cli\u003eInspect hoses and nozzles—replace if brittle or clogged\u003c\/li\u003e\n  \u003cli\u003eTest pump and spray pattern after installation to confirm operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this replacement assembly for? This PPNZQAUT 603-5404 reservoir assembly is intended for fleet owners, owner-operators, and mechanics servicing older Peterbilt trucks (1989–2007 models listed) who need a one-piece, ready-to-install washer tank with pump and cap. It’s a practical, cost-effective alternative to sourcing separate parts or locating scarce OEM components—ideal when the original reservoir is cracked, leaking, or the pump has failed and you want a durable aftermarket solution that restores washer functionality quickly.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this reservoir include the pump and cap?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the assembly ships with the washer pump and matching cap preinstalled.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will it fit my 2000 Peterbilt 379?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it fits Peterbilt 379 models from 1989 through 2007; confirm your exact configuration before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"PPNZQAUT","offers":[{"title":"Default Title","offer_id":55170645950807,"sku":"B0FN7LH1PV","price":108.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/ppnzqaut-reservoir-front-view_492c3c53-a3bb-4bd9-9f2b-380fb703f1ad.jpg?v=1790432325","url":"https:\/\/britishgarage.co.uk\/products\/ppnzqaut-windshield-washer-reservoir-for-peterbilt-1989-2007-replacement-tank-with-pre-installed-pump-cap-heavy-duty-fit","provider":"British Garage","version":"1.0","type":"link"}