The
Lower Radiator Hose for Toyota 12R (OEM Part Nos. 16572-31010, 16572-31011) is a high-quality
engine cooling system component that connects the
radiator lower outlet to the engine water pump inlet. Designed to meet
Toyota OEM specifications, this hose provides
reliable coolant transfer, excellent heat resistance, and long service life — even under demanding driving conditions.
This lower radiator hose is crafted with carefully engineered bends and reinforced construction to maintain stable coolant flow and resist cracking or bulging due to heat cycles and pressure fluctuations.
OEM Part Numbers
- 16572-31010 — Standard lower radiator hose
- 16572-31011 — Alternate length or routing variant for specific Toyota 12R cooling layouts
These variants correspond to differences in cooling system routing and accessory arrangements on Toyota vehicles equipped with the 12R engine series.
Vehicle Application
The lower radiator hoses with OEM Part Nos. 16572-31010 and 16572-31011 are typically used in Toyota vehicles fitted with the 12R petrol engine, including:
- Toyota Corolla (12R petrol variants)
- Toyota Celica (12R petrol variants)
- Toyota Corona / Mark II (12R petrol variants)
- Toyota Hilux / Pickup (older carbureted 12R petrol versions)
- Toyota LiteAce / TownAce (select 12R petrol variants)
Final applicability depends on model year, radiator layout and cooling circuit design. Always confirm OEM part number and engine variant with the VIN or parts catalogue before installation.
Function & Application
- Transfers coolant from the radiator lower outlet into the engine water pump inlet
- Maintains proper coolant circulation throughout the engine cooling system
- Helps regulate engine temperature under load
- Works in conjunction with the upper radiator hose and thermostat to maintain optimal heat control
Construction & Design
- Material: High-grade, heat-resistant rubber compound
- Reinforcement: Multi-layer synthetic fiber braid for strength and pressure resistance
- Finish: Smooth inner bore for unobstructed coolant flow
- Shape & Bends: Engine-specific contours designed for secure routing
- Ends: OEM-style bead/flare ends for secure clamp engagement
Performance Benefits
- Excellent resistance to engine heat, coolant chemicals and ageing
- Long service life with reduced risk of cracks, leaks or deformation
- Stable coolant flow under a range of operating temperatures
- Maintains correct engine temperature and prevents overheating
Installation & Service Notes
- Confirm the correct OEM part number (16572-31010 vs 16572-31011) based on vehicle model and routing
- Ensure proper hose routing that matches factory layout
- Use fresh hose clamps and inspect mating surfaces for corrosion before assembly
Replacement Recommendation
Replace the lower radiator hose when:
- Cracks, bulges or soft spots develop
- Coolant leakage is observed at hose ends
- Hose rubber shows signs of ageing, hardening or abrasion
- Cooling system service (e.g., water pump / thermostat change) is performed
Timely replacement helps preserve cooling system efficiency and engine protection.
Why Choose VINSON
Choosing VINSON ensures OEM-matched fitment, high-quality materials, and dependable cooling performance — helping reduce coolant leaks, prevent overheating, and minimize maintenance downtime.
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