Standard/OEIn stock
$11.71
10 items in stock
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14-WC370103• Rear• Drum Brake Wheel Cylinder
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GeoBrakes carries OEM-grade drum brake wheel cylinders confirmed to fit the Pontiac G3, the hydraulic actuators at the top of each drum brake assembly that convert brake fluid pressure into the mechanical force that pushes the G3 shoes against the drum. Available in new and remanufactured options for your G3, every cylinder is bored to OEM specifications
Standard/OE$11.71
10 items in stock
Select your vehicle to see compatible products and accurate pricing
The drum brake wheel cylinder on the Pontiac G3 is the hydraulic component that actuates your G3 drum brake shoes every time you press the brake pedal. Brake fluid pressure from the master cylinder enters the G3 wheel cylinder and acts equally on two opposed pistons, pushing them outward simultaneously toward each shoe on the Pontiac G3. A leaking G3 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 Pontiac G3.
Pontiac G3 drum brake wheel cylinders are particularly vulnerable to corrosion in American road salt conditions. Salt water penetrates the dust boots over time on the G3, attacking the cylinder bore surface. Once the Pontiac G3 bore is pitted, new piston cup seals cannot maintain a leak-free seal. Internally corroded G3 cylinders must be replaced, not rebuilt. Vehicles in high-salt urban environments often require G3 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 Pontiac G3. New cylinders are the stronger choice for G3 vehicles in high-corrosion environments. Remanufactured units offer excellent value for Pontiac G3 vehicles in moderate conditions where the original bore was sound. Our vehicle selector confirms the correct G3 cylinder, right bore diameter, port location, and mounting configuration, for your G3 drum brake assembly before purchase.
Can I drive my Pontiac G3 with a leaking wheel cylinder?
No. A leaking G3 cylinder actively loses hydraulic pressure from the brake circuit, reducing stopping force on your Pontiac G3 over time. Brake fluid that reaches the G3 shoes renders the friction material ineffective. A leaking Pontiac G3 wheel cylinder is an immediate safety concern that requires urgent attention.
Should I replace both wheel cylinders on my Pontiac G3 at the same time?
Yes. If one G3 cylinder has leaked or seized due to age and corrosion, the cylinder on the opposite side of the Pontiac G3 has experienced identical conditions and is at a similar stage of deterioration. Replacing both ensures balanced hydraulic pressure on your G3 and avoids a second service call within months.
Do I need to bleed the brakes on my Pontiac G3 after replacing a wheel cylinder?
Yes. Replacing a G3 wheel cylinder opens the hydraulic circuit, allowing air to enter. After installation on the Pontiac G3, the entire rear brake circuit must be bled to remove all air and restore a firm, consistent brake pedal on your G3.