44773KK030 Toyota HOSE UNION TO CHECK, Price: 7.98$, Weight: 0.059kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Toyota |
44773KK030 |
HOSE UNION TO CHECK |
0 |
0.059 |
2-3 |
7.98$ |
| Not Available | ||||||
Brake Vacuum Union Hose (Check Valve Connector) ?️
This small but critical hose-and-union piece is used in the brake booster vacuum line on many Toyota setups. Its job is to create a tight, leak-free connection between the vacuum source and the one-way check valve, so the booster always has stored vacuum ready for power-assisted braking.
Why this part is needed ✅
Modern brake boosters rely on engine vacuum (or a vacuum pump) to reduce pedal effort. The union hose helps maintain correct vacuum flow and prevents unmetered air leaks that can upset idle and braking feel.
How it works ⚙️
The hose seals onto its fittings and supports the check valve operation by keeping vacuum stable. When engine vacuum drops, the check valve holds vacuum in the booster so you still get assisted braking for a short time.
What happens if it’s broken ?
A cracked or loose hose can cause a hard brake pedal, longer stopping distance, hissing noises, rough idle, and possible lean-condition fault codes. In severe cases, braking assist may be reduced during repeated stops.