How to drain and flush a cooling system and check Radiator Cap on Toyota Yaris?

To begin with, to drain the cooling system, you can remove the expansion tank and radiator cap, letting the coolant drain. If the coolant is clean, it can be reused. Also, remove the thermostat and flush the engine until you see clean water. When refilling, secure all hoses and clips. You can use an antifreeze mixture and fill the system. If overheating occurs, squeeze the coolant hoses to release air. Check the radiator top hose for heat and release trapped air. Replace the pressure cap if damaged.

Genuine Toyota Yaris Radiator Cap

Cooling Radiator Cap

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7 Radiator Caps found

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Toyota Yaris Radiator Cap Sub-Assembly
Part Number: 16401-31480
$17.48 MSRP: $24.43
You Save: $6.95 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cap Sub-Assy, Radiator
- Replaces: 16401-02421, 16401-28430, 16401-28280
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2009-2013 Toyota Yaris | RS, STD | 4 Cyl 1.5L | 1NZFE; NCP131L-AGMRKA, NCP131L-AGMRKK, NCP131L-AGMVKK, NCP131L-AGPRKA, NCP131L-AGPRKK, NCP131L-AGPVKK, NCP131L-AHMRKA, NCP131L-AHMRKK, NCP131L-AHMVKK, NCP131L-AHPRKA, NCP131L-AHPRKK, NCP131L-AHPVKK, NCP91L-AGMRKA, NCP91L-AGMRKK, NCP91L-AGMVKK, NCP91L-AGPRKA, NCP91L-AGPRKK, NCP91L-AGPVKK, NCP91L-AHMRKA, NCP91L-AHMRKK, NCP91L-AHMVKK, NCP91L-AHPRKA, NCP91L-AHPRKK, NCP91L-AHPVKK, NCP93L-BEMRKA, NCP93L-BEMRKK, NCP93L-BEPRKA, NCP93L-BEPRKK
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Toyota Yaris Radiator Cap Sub-Assembly
Part Number: 16401-36020
$16.89 MSRP: $23.61
You Save: $6.72 (29%)
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Product Specifications
- Other Name: Cap Sub-Assy, Radiator; Filler Cap, Radiator Assembly Cap, Radiator Cap
- Manufacturer Note: TYPE C:REFER ILLUST.
- Replaces: 16401-31520, 16401-31792, 16401-62100
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2006-2018 Toyota Yaris | RS, STD | 4 Cyl 1.5L | 1NZFE; NCP131L-AGMRKA, 1NZFE; NCP131L-CGMRKA, 1NZFE; NCP91L-AGMRKA, NCP131L-AGMRKK, NCP131L-AGMVKK, NCP131L-AGPRKA, NCP131L-AGPRKK, NCP131L-AGPVKK, NCP131L-AHMRKA, NCP131L-AHMRKK, NCP131L-AHMVKK, NCP131L-AHPRKA, NCP131L-AHPRKK, NCP131L-AHPVKK, NCP131L-CGMRKA, NCP131L-CGMRKK, NCP131L-CGMSKK, NCP131L-CGPRKA, NCP131L-CGPRKK, NCP131L-CGPSKK, NCP131L-CHMRKA, NCP131L-CHMRKK, NCP131L-CHMSKK, NCP131L-CHPRKA, NCP131L-CHPRKK, NCP131L-CHPSKK, NCP91L-AGMRKK, NCP91L-AGMVKK, NCP91L-AGPRKA, NCP91L-AGPRKK, NCP91L-AGPVKK, NCP91L-AHMRKA, NCP91L-AHMRKK, NCP91L-AHMVKK, NCP91L-AHPRKA, NCP91L-AHPRKK, NCP91L-AHPVKK, NCP93L-BEMRKA, NCP93L-BEMRKK, NCP93L-BEPRKA, NCP93L-BEPRKK
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Toyota Yaris Radiator Cap Sub-Assembly
Part Number: 16401-62100
$16.89 MSRP: $23.61
You Save: $6.72 (29%)
ADD TO CART
Product Specifications
- Other Name: Cap Sub-Assy, Radiator
- Replaced by: 16401-36020
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2006-2010 Toyota Yaris | RS, STD | 4 Cyl 1.5L | 1NZFE; NCP91L-AGMRKA, NCP91L-AGMRKK, NCP91L-AGMVKK, NCP91L-AGPRKA, NCP91L-AGPRKK, NCP91L-AGPVKK, NCP91L-AHMRKA, NCP91L-AHMRKK, NCP91L-AHMVKK, NCP91L-AHPRKA, NCP91L-AHPRKK, NCP91L-AHPVKK, NCP93L-BEMRKA, NCP93L-BEMRKK, NCP93L-BEPRKA, NCP93L-BEPRKK
View related parts
Toyota Yaris Radiator Cap Sub-Assembly
Part Number: 16401-31520
$16.89 MSRP: $23.61
You Save: $6.72 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Cap Sub-Assy, Radiator
- Manufacturer Note: TYPE B:REFER ILLUST.
- Replaced by: 16401-36020
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2010-2017 Toyota Yaris | RS, STD | 4 Cyl 1.5L | 1NZFE; NCP131L-AGMRKA, NCP131L-AGMRKK, NCP131L-AGMVKK, NCP131L-AGPRKA, NCP131L-AGPRKK, NCP131L-AGPVKK, NCP131L-AHMRKA, NCP131L-AHMRKK, NCP131L-AHMVKK, NCP131L-AHPRKA, NCP131L-AHPRKK, NCP131L-AHPVKK, NCP131L-CGMRKA, NCP131L-CGMRKK, NCP131L-CGMSKK, NCP131L-CGPRKA, NCP131L-CGPRKK, NCP131L-CGPSKK, NCP131L-CHMRKA, NCP131L-CHMRKK, NCP131L-CHMSKK, NCP131L-CHPRKA, NCP131L-CHPRKK, NCP131L-CHPSKK, NCP93L-BEMRKA, NCP93L-BEMRKK, NCP93L-BEPRKA, NCP93L-BEPRKK
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Toyota Yaris Reserve Tank Cap Sub-Assembly
Part Number: 16471-23030
$4.75 MSRP: $6.64
You Save: $1.89 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cap Sub-Assy, Reserve Tank; Cap, Reservoir Cap
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2006-2018 Toyota Yaris | RS, STD | 4 Cyl 1.5L | 1NZFE; NCP131L-AGMRKA, NCP131L-AGMRKK, NCP131L-AGMVKK, NCP131L-AGPRKA, NCP131L-AGPRKK, NCP131L-AGPVKK, NCP131L-AHMRKA, NCP131L-AHMRKK, NCP131L-AHMVKK, NCP131L-AHPRKA, NCP131L-AHPRKK, NCP131L-AHPVKK, NCP131L-CGMRKA, NCP131L-CGMRKK, NCP131L-CGMSKK, NCP131L-CGPRKA, NCP131L-CGPRKK, NCP131L-CGPSKK, NCP131L-CHMRKA, NCP131L-CHMRKK, NCP131L-CHMSKK, NCP131L-CHPRKA, NCP131L-CHPRKK, NCP131L-CHPSKK, NCP91L-AGMRKA, NCP91L-AGMRKK, NCP91L-AGMVKK, NCP91L-AGPRKA, NCP91L-AGPRKK, NCP91L-AGPVKK, NCP91L-AHMRKA, NCP91L-AHMRKK, NCP91L-AHMVKK, NCP91L-AHPRKA, NCP91L-AHPRKK, NCP91L-AHPVKK, NCP93L-BEMRKA, NCP93L-BEMRKK, NCP93L-BEPRKA, NCP93L-BEPRKK
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Toyota Yaris Vane Pump Oil Reservoir Cap Sub-Assembly
Part Number: 16405-WB001
$30.31 MSRP: $42.37
You Save: $12.06 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cap Sub-Assy, Radiator Reserve Tank; Cap, Reservoir Cap
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2019-2020 Toyota Yaris | Base, Entry, High | P5 | P5; DADW-NAA, DADW-NAB, DADW-NAC, DAEA-NAA, DAEA-NAB, DAEA-NAC, DAEA-NAD, DAEA-NAE, DAEB-NAC, DAEC-NAC, DAEC-NAD, DAEC-NAE, DAEC-NAF, DAED-NAA, DAEE-NAA, DAEE-NAB, DDF4-NAA, DDF4-NAB, DDF4-NAC, DDF4-NAD, DDF5-NAA, DDF5-NAB, DDF5-NAC, DDF5-NAD, DDF5-NAE, DDF5-NAF, DDF5-NAG, DDF8-NAA, DDF9-NAA, DDF9-NAB, DM0S-NAA, DM0S-NAB, DM0S-NAC, DM0T-NAA, DM0T-NAB, DM0T-NAC, DM0T-NAD, DM0T-NAE, DM0V-NAA, DM0W-NAA, DM0W-NAB
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Toyota Yaris Radiator Cap Sub-Assembly
Part Number: 16401-WB001
$27.45 MSRP: $38.37
You Save: $10.92 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Cap Sub-Assy, Radiator; Radiator Cap
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2019-2020 Toyota Yaris | Base, Entry, High | P5 | P5; DADW-NAA, DADW-NAB, DADW-NAC, DAEA-NAA, DAEA-NAB, DAEA-NAC, DAEA-NAD, DAEA-NAE, DAEB-NAC, DAEC-NAC, DAEC-NAD, DAEC-NAE, DAEC-NAF, DAED-NAA, DAEE-NAA, DAEE-NAB, DDF4-NAA, DDF4-NAB, DDF4-NAC, DDF4-NAD, DDF5-NAA, DDF5-NAB, DDF5-NAC, DDF5-NAD, DDF5-NAE, DDF5-NAF, DDF5-NAG, DDF8-NAA, DDF9-NAA, DDF9-NAB, DM0S-NAA, DM0S-NAB, DM0S-NAC, DM0T-NAA, DM0T-NAB, DM0T-NAC, DM0T-NAD, DM0T-NAE, DM0V-NAA, DM0W-NAA, DM0W-NAB

Toyota Yaris Radiator Cap

The Toyota Yaris Radiator Cap protects the small hatchback's cooling system by holding the coolant under accurate pressure for the motor to stay at the right temperature during every drive. The Radiator Cap acts like a spring-loaded valve that keeps roughly sixteen pounds per square inch in the radiator. This pushes the coolant's boiling point higher so heat can be pulled away without vaporizing. When pressure exceeds that limit, the Radiator Cap allows some fluid to escape into an overflow bottle before sucking it back in when it cools down, creating a full, air-free circuit. From one model year to the next, the basic two-way Radiator Cap design employed on every Toyota Yaris has remained consistent. Therefore, owners will not find separate high-pressure racing or twist-lock variants in factory trim, only the standard cap which threads onto the filler neck. The variations are confined to the seals, gasket materials, or colors of the labels, so every Toyota operator can anticipate precisely the same steadfast functionality in any Yaris engine bay. Just keep the Radiator Cap clean and tightly fitted to maintain steady coolant pressure.

If you are in demand for superior quality and affordable OEM Toyota Yaris Radiator Cap, then shop with us! We own a wide range of the reduced-priced genuine Toyota Yaris Radiator Cap. You can purchase in confidence as all parts come with a manufacturer's warranty. Any issues with our products? No need to worry as we have a hassle-free return policy to guide you every step of the way.

Toyota Yaris Radiator Cap Parts Questions & Experts Answers

Radiator Cap Sub-Assembly
16401-31480
Q: How to drain and flush a cooling system and check Radiator Cap on Toyota Yaris?
A:
To begin with, to drain the cooling system, you can remove the expansion tank and radiator cap, letting the coolant drain. If the coolant is clean, it can be reused. Also, remove the thermostat and flush the engine until you see clean water. When refilling, secure all hoses and clips. You can use an antifreeze mixture and fill the system. If overheating occurs, squeeze the coolant hoses to release air. Check the radiator top hose for heat and release trapped air. Replace the pressure cap if damaged.