Subaru 26402AG04A Vacuum BSTR Assembly LH

You can Select Your Vehicle to check if 26402AG04A fits your vehicle.

Symptoms indicating potential brake system defects include the vehicle pulling to one side when the brake pedal is pressed, squealing or dragging noises when brakes are applied, excessive brake pedal travel, pedal pulsations, or brake fluid leaks, usually onto the inside of the tire or wheel.

To check the operation, depress the brake pedal several times with the engine off and ensure there is no change in the pedal reserve distance. Then, depress the pedal and start the engine. If the pedal goes down slightly, operation is normal.

The process for inspecting brakes involves loosening the wheel lug nuts, raising the vehicle on jackstands, and removing the wheels. For disc brakes, the inspection includes checking pad thickness, measuring disc thickness, and examining the condition of the discs for scoring, gouging, or burned spots. Brake lines and hoses are inspected for damage, wear, leaks, and other issues. For drum brakes, the parking brake must be off, and the brake drums are removed for cleaning and inspection. The thickness of lining material on brake shoes is measured and compared to specifications. All brake assembly springs are checked, and components are inspected for signs of fluid leakage. The brake drum's interior is cleaned and checked for imperfections, and the procedure is repeated for the remaining wheel.

If the booster is defective, replace it with a new or rebuilt unit.