What causes the failure of the Sagitar's brake assist system?
2 Answers
The failure of the Sagitar's brake assist system refers to issues with the vacuum booster (or electric booster in some models). If the brake assist system fails, the brake pedal will feel noticeably heavier when pressed. This could be due to a malfunction in the vehicle's brake booster, air leaks in the pipelines, or issues with the vacuum pressure sensor. The reasons for brake failure caused by the Sagitar's brake assist system malfunction are as follows: 1. Improper operation leading to mechanical failure: For example, prolonged downhill driving can cause the brake pads to overheat, the brake drums to carbonize, and the braking function to completely fail. 2. Lack of necessary maintenance for the brake system: Excessive impurities in the brake master cylinder, poor sealing, failure of the vacuum booster pump, contaminated brake fluid or mixing different types of brake fluid causing vapor lock when heated, leakage in the brake master cylinder or wheel cylinders, or air leaks in the air reservoir or pipeline connections.
With over a decade of car repair experience, I can tell you the Sagitar's brake booster failure requires thorough disassembly. That car relies on a vacuum booster pump – if the pedal suddenly gets stiff, there's an 80% chance it's an air leak. First check vacuum hose cracks by applying soapy water to joints and listening for hissing sounds. If the booster diaphragm is torn, the entire assembly must be replaced – oil stains on the inner wall during disassembly are definitive proof. A stuck one-way valve can also drain vacuum, which can be tested by pinching the soft hose. Oh, and for older cars, always inspect the alternator belt – slippage causes insufficient vacuum pump RPM. Once had a customer who forced it for three kilometers until the brake pads smoked, nearly causing a rear-end collision. If this happens, pull over immediately, don't even use the jack – calling a tow truck is the only safe option.
