The Laser Tools 4875 is a pen-style tester that provides an instant diagnostic of brake fluid quality by measuring moisture content. Brake fluid is hygroscopic and absorbs water over time, which can lead to brake fade and internal corrosion. This tool uses LED indicators to show if the fluid is safe (Green), needs changing soon (Yellow), or must be replaced immediately (Red). It is a vital upsell tool for UK service centres. For a complete fluid service, use after a flush with the Pneumatic Bleeder.
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