Standard/OEIn stock
$16.71
10 items in stock
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14-WC370143• Rear• Drum Brake Wheel Cylinder
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GeoBrakes carries OEM-grade drum brake wheel cylinders confirmed to fit the Toyota Sienna, the hydraulic actuators at the top of each drum brake assembly that convert brake fluid pressure into the mechanical force that pushes the Sienna shoes against the drum. Available in new and remanufactured options for your Sienna, every cylinder is bored to OEM specifications
Standard/OE$16.71
10 items in stock
Select your vehicle to see compatible products and accurate pricing
The drum brake wheel cylinder on the Toyota Sienna is the hydraulic component that actuates your Sienna drum brake shoes every time you press the brake pedal. Brake fluid pressure from the master cylinder enters the Sienna wheel cylinder and acts equally on two opposed pistons, pushing them outward simultaneously toward each shoe on the Toyota Sienna. A leaking Sienna 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 Toyota Sienna.
Toyota Sienna drum brake wheel cylinders are particularly vulnerable to corrosion in American road salt conditions. Salt water penetrates the dust boots over time on the Sienna, attacking the cylinder bore surface. Once the Toyota Sienna bore is pitted, new piston cup seals cannot maintain a leak-free seal. Internally corroded Sienna cylinders must be replaced, not rebuilt. Vehicles in high-salt urban environments often require Sienna 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 Toyota Sienna. New cylinders are the stronger choice for Sienna vehicles in high-corrosion environments. Remanufactured units offer excellent value for Toyota Sienna vehicles in moderate conditions where the original bore was sound. Our vehicle selector confirms the correct Sienna cylinder, right bore diameter, port location, and mounting configuration, for your Sienna drum brake assembly before purchase.
Can I drive my Toyota Sienna with a leaking wheel cylinder?
No. A leaking Sienna cylinder actively loses hydraulic pressure from the brake circuit, reducing stopping force on your Toyota Sienna over time. Brake fluid that reaches the Sienna shoes renders the friction material ineffective. A leaking Toyota Sienna wheel cylinder is an immediate safety concern that requires urgent attention.
Should I replace both wheel cylinders on my Toyota Sienna at the same time?
Yes. If one Sienna cylinder has leaked or seized due to age and corrosion, the cylinder on the opposite side of the Toyota Sienna has experienced identical conditions and is at a similar stage of deterioration. Replacing both ensures balanced hydraulic pressure on your Sienna and avoids a second service call within months.
Do I need to bleed the brakes on my Toyota Sienna after replacing a wheel cylinder?
Yes. Replacing a Sienna wheel cylinder opens the hydraulic circuit, allowing air to enter. After installation on the Toyota Sienna, the entire rear brake circuit must be bled to remove all air and restore a firm, consistent brake pedal on your Sienna.