The brake wheel cylinder is a critical hydraulic component found inside the rear drum brakes of many vehicles, particularly hatchbacks, bakkies, and older sedans. When you press the brake pedal, hydraulic fluid is forced into the cylinder, pushing two small pistons outward. These pistons then shove the brake shoes against the inside of the spinning drum to create the friction needed to stop your car. Because they are tucked away inside the drum, wheel cylinders are often forgotten until they start leaking. In South Africa’s hot and often dusty conditions, the rubber seals inside these cylinders are under constant stress, and a failure here can lead to a "sinking" pedal and a dangerous loss of rear braking power.
Note: These prices generally include the call-out fee (if mobile), two new wheel cylinders, fresh brake fluid, and labor. If the brake shoes are also "fluid-soaked" and need replacement, expect the cost to increase by R600 – R1,200.
It is a good idea to get the brake wheel cylinders inspected once every year. You should get your brake system inspected immediately if the brake warning light is on.
When you depress your brake pedal, the brake wheel cylinder applies pressure to the brake shoe. This pressure pushes the brake shoe into contact with the brake drum, creating friction that allows your vehicle to slow down and stop. When the brake wheel cylinder stops working, it can no longer exert enough force onto the brake shoe, and your car will not be able to brake as effectively as it should.