4430535020 Toyota CAP SUB-ASSY, VANE PUMP OIL RESERVOIR, Price: 14.91$, Weight: 0.029kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Toyota |
4430535020 |
CAP SUB-ASSY, VANE PUMP OIL RESERVOIR |
1 |
0.029 |
2-3 |
14.91$ |
Compatibility
| Description | Model | Options | Prod Period | Diagram |
|---|---|---|---|---|
| KZN165,190,KDN,LN,RZN,YN,VZN14#,15#,16#,17#,19# | RZN147R-TRMDSN | ATM,MTM: MANUAL TRANSMISSION; Building Condition: COMPLETELY BUILT UNIT; Cab: SINGLE CAB; Driver's Position: RIGHT-HAND DRIVE VEHICLES; Grade: DLX TYPE; Fuel Induction: CARBURETOR SYSTEM; Engine: (1RZ) 2000CC; Destination: SOUTH AFRICA | 07.1998 - 04.2005 | View |
| Description | Model | Options | Prod Period | Diagram |
|---|---|---|---|---|
| LF50,RZF50 | LF50R-HRMRSD | Grade: STANDARD TYPE; Engine: (2L) 2400CC DIESEL | 12.1999 - 12.2004 | View |
Power Steering Pump Oil Reservoir Cap & Seal
This replacement cap set is designed to close the power steering fluid reservoir on vane-type pumps and keep the system sealed under heat and vibration. It’s a small part, but it protects the whole steering hydraulic circuit ✅.
Why this part is needed
The reservoir must stay airtight to prevent foaming, contamination, and fluid loss. A correct cap maintains proper fluid level control and helps the pump pull clean, bubble-free oil for smooth steering assist .
How it works
The cap locks onto the reservoir neck and compresses its gasket to form a tight seal. Many designs also allow safe pressure equalization while blocking dust and moisture. With a good seal, the pump can circulate fluid without cavitation and keep steering effort consistent.
What happens if it’s broken
A cracked or loose cap can cause leaks, low fluid level, and air entering the system. You may notice whining noise, stiff steering when parking, jerky assist, or fluid sprayed around the pump area. Long-term driving like this can overheat the pump and damage internal vanes ⚠️.
Best practice
Replace the cap if the seal is hard, swollen, or missing, and always use the correct steering fluid for your vehicle.