Standard/OEIn stock
$17.18
10 items in stock
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14-WC370094• Rear• Drum Brake Wheel Cylinder
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GeoBrakes carries OEM-grade drum brake wheel cylinders confirmed to fit the Mercury Mariner, the hydraulic actuators at the top of each drum brake assembly that convert brake fluid pressure into the mechanical force that pushes the Mariner shoes against the drum. Available in new and remanufactured options for your Mariner, every cylinder is bored to OEM specifications
Standard/OE$17.18
10 items in stock
Select your vehicle to see compatible products and accurate pricing
The drum brake wheel cylinder on the Mercury Mariner is the hydraulic component that actuates your Mariner drum brake shoes every time you press the brake pedal. Brake fluid pressure from the master cylinder enters the Mariner wheel cylinder and acts equally on two opposed pistons, pushing them outward simultaneously toward each shoe on the Mercury Mariner. A leaking Mariner wheel cylinder actively bleeds hydraulic pressure from the brake circuit and contaminates the brake shoes with fluid, both of which directly compromise your ability to stop the Mercury Mariner.
Mercury Mariner drum brake wheel cylinders are particularly vulnerable to corrosion in American road salt conditions. Salt water penetrates the dust boots over time on the Mariner, attacking the cylinder bore surface. Once the Mercury Mariner bore is pitted, new piston cup seals cannot maintain a leak-free seal. Internally corroded Mariner cylinders must be replaced, not rebuilt. Vehicles in high-salt urban environments often require Mariner wheel cylinder replacement on the same service interval as brake shoes.
GeoBrakes stocks both new OEM-specification wheel cylinders and quality remanufactured units for the Mercury Mariner. New cylinders are the stronger choice for Mariner vehicles in high-corrosion environments. Remanufactured units offer excellent value for Mercury Mariner vehicles in moderate conditions where the original bore was sound. Our vehicle selector confirms the correct Mariner cylinder, right bore diameter, port location, and mounting configuration, for your Mariner drum brake assembly before purchase.
Can I drive my Mercury Mariner with a leaking wheel cylinder?
No. A leaking Mariner cylinder actively loses hydraulic pressure from the brake circuit, reducing stopping force on your Mercury Mariner over time. Brake fluid that reaches the Mariner shoes renders the friction material ineffective. A leaking Mercury Mariner wheel cylinder is an immediate safety concern that requires urgent attention.
Should I replace both wheel cylinders on my Mercury Mariner at the same time?
Yes. If one Mariner cylinder has leaked or seized due to age and corrosion, the cylinder on the opposite side of the Mercury Mariner has experienced identical conditions and is at a similar stage of deterioration. Replacing both ensures balanced hydraulic pressure on your Mariner and avoids a second service call within months.
Do I need to bleed the brakes on my Mercury Mariner after replacing a wheel cylinder?
Yes. Replacing a Mariner wheel cylinder opens the hydraulic circuit, allowing air to enter. After installation on the Mercury Mariner, the entire rear brake circuit must be bled to remove all air and restore a firm, consistent brake pedal on your Mariner.