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    DIESEL EMISSIONS FLUID (DEF) CAPS

    If your diesel powered vehicle model is from 2010 or later, your vehicle likely needs a Diesel Exhaust Fluid (DEF) automotive cap from Gates. Gates DEF hoses, components and assemblies are specially designed and manufactured for DEF system conveying, with DEF caps engineered to keep your emission fluids inside the tank without leaks, contamination, or cracks.

    The product images shown are Illustrative only and may not be an exact representation of the product.

    DEF Tank Caps

    Gates Non-Locking DEF Caps prevents diesel exhaust fluid from leaking or spilling through the filler neck, while keeping dirt and debris out. The distinctive blue cap color is designed to help automotive technicians clearly identify the DEF tank filler neck, preventing frustrating and costly repairs that result from foreign fluids in the DEF tank. Conduct simple tank cap replacements with Gates.

    • Direct replacement for an OE-equivalent fit.
    • Meets or exceeds all regulatory requirements.
    • Constructed from high-quality, heat-resistant materials for a long service life.
    • Vehicle try-on testing and vibration testing have been conducted on this part to ensure trouble-free performance.
      Thermostats and Caps

    All Parts

    Part # Product # Description Type Cam Type Locking Venting Neck Diameter Cap Depth

    Keep your Cap in Top Condition

    If your DEF cap wears, even with the slightest leak or crack, you'll end up wasting fluids due to evaporation or, even worse, you can damage your vehicle systems. If dirt or debris gets into your DEF, it will likely settle into the catalytic converter, making your emissions systems less efficient.

    We engineer and test our tank caps for a long-lasting, leak-free fit, as a trusted replacement for OE and aftermarket tank caps.

    OE Quality for the Aftermarket.

    Our long-standing partnerships with automotive OEMs on production vehicles enable us to produce aftermarket parts of superior quality, durability, and performance. That experience goes into every Gates aftermarket engine component and accessory, bringing a range of solutions for virtually every fluid power and power transmission vehicle applications.

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