{"product_id":"johnsens-dot-4-brake-fluid-1-gallon-premium-synthetic-high-boiling-point-abs-safe","title":"Johnsen's DOT-4 Brake Fluid 1 Gallon — Premium Synthetic, High Boiling Point \u0026 ABS Safe","description":"\u003cp\u003e\u003cstrong\u003eJohnsen's 5034 is a premium synthetic DOT-4 brake fluid in a one-gallon container engineered to deliver high boiling resistance and reliable performance in disc, drum and ABS systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis one-gallon bottle of Johnsen's 5034 DOT-4 brake fluid is formulated to meet and exceed DOT 3 and DOT 4 specifications while offering extra protection against moisture uptake and vapor lock. It’s designed for modern hydraulic braking systems where higher boiling points and stable pressure transmission matter — including vehicles equipped with anti-lock braking systems. The synthetic base and additive package help maintain braking responsiveness under repeated stops and elevated temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eHow does Johnsen's 5034 protect against vapor lock and moisture?\u003c\/h3\u003e\n\u003cp\u003eThe fluid contains specialized additives that reduce the effects of moisture absorption and raise the wet and dry boiling points. That lowers the chance of vapor formation under heavy braking and preserves pedal feel over time. Regular fluid maintenance combined with this formulation helps limit internal corrosion and preserve system performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpecial additives to reduce vapor formation and gas bubbles\u003c\/li\u003e\n  \u003cli\u003eImproved resistance to moisture-related boiling point reduction\u003c\/li\u003e\n  \u003cli\u003eHelps minimize internal corrosion in hydraulic lines and components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this brake fluid work with my ABS, disc, or drum brakes?\u003c\/h3\u003e\n\u003cp\u003eYes — Johnsen's 5034 is suitable for disc, drum and ABS hydraulic systems. It’s formulated to meet the compatibility needs of modern braking components and the tighter tolerances of ABS modulators. Use it in systems that call for DOT 4 or DOT 3 flu ids, but always follow your vehicle manufacturer’s specification before topping up or replacing fluid.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with ABS modulators and valves\u003c\/li\u003e\n  \u003cli\u003eAppropriate for both disc and drum brake circuits\u003c\/li\u003e\n  \u003cli\u003eMeets or exceeds DOT 3 and DOT 4 requirements for broad compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use and store this one-gallon container?\u003c\/h3\u003e\n\u003cp\u003eUse clean tools and follow standard procedures when bleeding or topping brake systems to avoid contamination. Keep the container sealed when not in use and store it in a cool, dry place away from direct sunlight. Replace brake fluid according to your vehicle maker’s intervals or when moisture content or boiling performance declines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eKeep the cap tightly closed to limit moisture exposure\u003c\/li\u003e\n  \u003cli\u003eStore upright in a cool, ventilated area away from heat sources\u003c\/li\u003e\n  \u003cli\u003eFollow vehicle manufacturer guidelines for fluid change intervals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits can I expect from DOT-4 over DOT-3?\u003c\/h3\u003e\n\u003cp\u003eDOT-4 fluids generally have higher dry and wet boiling points than DOT-3, providing better resistance to fade under heavy braking. Johnsen's 5034 builds on that with synthetic base stocks and anti-corrosion additives for more consistent pedal feel and longevity. For heavier vehicles or performance driving, the extra margin against boiling is especially helpful.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigher boiling point for reduced brake fade during repeated stops\u003c\/li\u003e\n  \u003cli\u003eSynthetic formulation for stable viscosity across temperatures\u003c\/li\u003e\n  \u003cli\u003eEnhanced additive package for corrosion control and system protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Johnsen's 5034 Premium Synthetic DOT-4 Brake Fluid is aimed at DIY mechanics, professional technicians and vehicle owners who need a full-gallon supply for maintenance, fleet servicing or multiple vehicles. It’s a practical choice when your vehicle calls for DOT 4 (or accepts DOT 3) and you want a synthetic, higher-boiling fluid that helps protect ABS systems, discs and drums. Always confirm your vehicle’s recommended brake fluid specification before use and observe safe fluid-handling practices.\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: Is Johnsen's 5034 compatible with DOT 3 systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Johnsen's 5034 exceeds DOT 3 and DOT 4 specifications and can be used where DOT 3 is allowed, but always follow your vehicle manufacturer's guidance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should brake fluid be replaced?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replace brake fluid per your vehicle manual or when testing shows increased moisture or reduced boiling performance, commonly every 1–2 years for many vehicles.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Johnsen's","offers":[{"title":"Default Title","offer_id":55168673808727,"sku":"B001DKPBR8","price":73.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/johnsens-5034-front-label-1g.jpg?v=1790411502","url":"https:\/\/britishgarage.co.uk\/products\/johnsens-dot-4-brake-fluid-1-gallon-premium-synthetic-high-boiling-point-abs-safe","provider":"British Garage","version":"1.0","type":"link"}