45mm Master Cylinder Bleeder Adapter, Brake Bleeder Adapter for Most European Vehicles, Pressure Brake Bleeder Tool Compatible with Brake Fluid Bleeder Kit

45mm Brake Bleeder Adapter Cap – Designed for select GM vehicles (Cadillac, Buick) as well as Chrysler and Saturn models. Replaces the original reservoir cap for pressure or manual bleeding.Advantages: ✔ Standard 45mm internal thread fits many round filler necks. ✔ Pre-installed one-piece gasket – no extra seals needed. ✔ Matte black finish resists stains and is easy to identify. Note: Clean the reservoir threads before installation and ensure the gasket sits flat. Works with non-pressure bleeders .

• 【45MM PRECISION FIT】This master cylinder bleeder adapter is machined to a true 45mm inner diameter (outer 57mm), matching the reservoir opening of most European vehicles from VW, BMW, Mercedes, Audi, Volvo, Peugeot, Renault, and more. Check your cap size – if it’s 45mm, this adapter fits.
• 【ZERO LEAK – RUBBER SEAL INCLUDED】 A high‑density rubber sealing gasket sits inside the threaded collar. When you screw it onto the reservoir, it compresses into an air‑tight and fluid‑tight barrier. No drips, no air suck‑back, no mess. Works with any brake bleeder adapter kit or pressure brake bleeder.
• 【BRAKE FLUID RESISTANT MATERIALS】The body is molded from high‑strength engineering plastic; the thread ring is alloy metal. The rubber seal is formulated to resist DOT3, DOT4, and DOT5.1 brake fluids. No cracking, swelling, or softening – even after repeated exposure.
• 【HAND‑THREADS IN SECONDS】 No wrench, no tape, no sealant. Simply remove your reservoir cap and screw on this brake bleeder adapter by hand. The built‑in rubber ring creates the seal instantly. Then connect your brake flush kit or manual brake fluid bleeder and start bleeding.
• 【COMPATIBLE WITH ALL POPULAR BLEEDERS】Works with pressure brake bleeders, pneumatic brake bleeders, manual pump bleeders, and even bench bleeding kits. Use it with Schwaben, Motive, Lisle, or any brake bleeder kit that uses a standard quick‑connect hose. One adapter serves multiple tools.