What is the importance of the radiator cap in the cooling system and how does its service and repair contribute to optimal performance on Toyota Celica?

The radiator cap helps maintain the cooling system work correctly so repair and service need understanding how it fits with the overall system. Regularly checking the radiator cap helps keep the cooling system working well and avoids engine overheating issues.

OEM Toyota Radiator Cap

Cooling Radiator Cap

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101 Radiator Caps found

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Toyota Reservoir Cap
Part Number: 16405-28070
$21.74 MSRP: $30.25
You Save: $8.51 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Engine Coolant Reservoir Cap; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- Camry | 2007-2011 | Base, CE, Hybrid, LE, SE, XLE | 4 Cyl 2.4 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.4 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.5 L GAS
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Toyota Reservoir Cap
Part Number: 16405-21040
$22.93 MSRP: $31.92
You Save: $8.99 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Engine Coolant Reservoir Cap; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- Prius | 2004-2009 | Base, Touring | 4 Cyl 1.5 L FULL HYBRID EV-GAS (FHEV)
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Toyota Cap Assembly
Part Number: 16405-75020
$16.84 MSRP: $23.43
You Save: $6.59 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Engine Coolant Reservoir Cap; Radiator Cap; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- 4Runner | 1996-2002 | Base, Limited, SR5 | 4 Cyl 2.7 L GAS, 6 Cyl 3.4 L GAS
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Toyota Reservoir Cap
Part Number: 16405-0T020
$23.53 MSRP: $32.75
You Save: $9.22 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Engine Coolant Reservoir Cap; Radiator Cap; Cap Assembly; Cap; Cap Sub-Assembly, Reserve Tank
- Replaces: 16405-22060
Fits the following Toyota Models:
- Corolla | 2009-2013 | Base, L, LE, S, XLE, XRS | 4 Cyl 1.8 L GAS, 4 Cyl 2.4 L GAS
- Matrix | 2009-2013 | Base, S, XRS | 4 Cyl 1.8 L GAS, 4 Cyl 2.4 L GAS
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Toyota Reservoir Cap
Part Number: 16405-0D030
$31.89 MSRP: $44.39
You Save: $12.50 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Engine Coolant Reservoir Cap; Cap; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- Corolla | 2005-2008 | CE, LE, S | 4 Cyl 1.8 L GAS
- Matrix | 2003-2008 | Base, XR, XRS | 4 Cyl 1.8 L GAS
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Toyota Reservoir Cap
Part Number: 16405-0P030
$26.88 MSRP: $37.41
You Save: $10.53 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reserve Tank; Engine Coolant Reservoir Cap; Cap
Fits the following Toyota Models:
- Tacoma | 2005-2023 | Base, Limited, Nightshade, Pre Runner, SR, SR5, Trail, Trail Special Edition, TRD Off-Road, TRD Pro, TRD Sport, X-Runner | 4 Cyl 2.7 L GAS, 6 Cyl 3.5 L GAS, 6 Cyl 4.0 L GAS
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Toyota Reservoir Cap
Part Number: 16405-25010
$13.49 MSRP: $18.78
You Save: $5.29 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Engine Coolant Overflow Hose; Cap; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- Camry | 2018-2019 | Hybrid LE, Hybrid SE, Hybrid XLE, L, LE, SE, XLE, XSE | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
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Toyota Reservoir Cap
Part Number: 16405-28031
$21.74 MSRP: $30.25
You Save: $8.51 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Engine Coolant Reservoir Cap; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- Camry | 2005-2006 | Base, LE, SE, XLE | 4 Cyl 2.4 L GAS
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Toyota Cap Sub-Assembly, Reserve Tank
Part Number: 16405-22040
$12.06 MSRP: $16.78
You Save: $4.72 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir
Fits the following Toyota Models:
- 4Runner | 2019-2023 | 40th Anniversary Edition, Limited, Nightshade, SR5, SR5 Premium, Trail, TRD Off-Road, TRD Off-Road Premium, TRD Pro, TRD Sport, Venture | 6 Cyl 4.0 L GAS
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Toyota Cap Sub-Assembly, Reserve Tank
Part Number: 16405-F0030
$5.13 MSRP: $7.14
You Save: $2.01 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Cap, Reserve Tank
Fits the following Toyota Models:
- Grand Highlander | 2024 | Hybrid Limited, Hybrid Platinum, Hybrid XLE, Limited, Platinum, XLE | 4 Cyl 2.4 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.4 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
- Highlander | 2020-2023 | Hybrid Bronze Edition, Hybrid LE, Hybrid Limited, Hybrid Platinum, Hybrid XLE, L, LE, Limited, Platinum, XLE, XSE | 4 Cyl 2.4 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 6 Cyl 3.5 L GAS
- RAV4 | 2019-2023 | Adventure, Hybrid LE, Hybrid Limited, Hybrid SE, Hybrid XLE, Hybrid XLE Premium, Hybrid XSE, LE, Limited, TRD Off-Road, XLE, XLE Premium | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
- Sienna | 2021-2023 | 25th Anniversary Edition, LE, Limited, Platinum, XLE, XSE | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
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Toyota Reservoir Cap
Part Number: 16405-0D060
$31.66 MSRP: $44.06
You Save: $12.40 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Engine Coolant Reservoir Cap; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- Corolla | 2005-2006 | XRS | 4 Cyl 1.8 L GAS
- Matrix | 2005-2006 | XRS | 4 Cyl 1.8 L GAS
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Toyota Reservoir Cap
Part Number: 16471-AA010
$6.92 MSRP: $9.63
You Save: $2.71 (29%)
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Product Specifications
- Other Name: Cap, Radiator Reserve; Engine Coolant Reservoir Cap; Cap; Cap Sub-Assembly, Reserve Tank
- Replaces: 16471-0A010
Fits the following Toyota Models:
- Avalon | 2000-2012 | Base, Limited, Touring, XL, XLS | 6 Cyl 3.0 L GAS, 6 Cyl 3.5 L GAS
- Camry | 2002-2011 | Base, CE, Hybrid, LE, SE, XLE | 4 Cyl 2.4 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.4 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L GAS, 6 Cyl 3.5 L GAS
- Solara | 2004-2008 | SE, SE Sport, SLE, Sport | 4 Cyl 2.4 L GAS, 6 Cyl 3.3 L GAS
- Venza | 2009-2015 | Base, LE, Limited, XLE | 4 Cyl 2.7 L GAS, 6 Cyl 3.5 L GAS
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Toyota Cap
Part Number: 16475-WAA02
$11.39 MSRP: $15.85
You Save: $4.46 (29%)
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Product Specifications
- Other Name: Cap, Reserve Tank; Engine Coolant Reservoir Cap; Radiator Cap; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- GR Supra | 2020-2024 | 45th Anniversary Edition, A91 Edition, A91-MT Edition, Base, Launch Edition, Premium | 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L GAS
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Toyota Radiator Cap
Part Number: 16401-76021
$18.99 MSRP: $26.43
You Save: $7.44 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Radiator; Cap
- Replaces: 16401-76020
Fits the following Toyota Models:
- Previa | 1991-1997 | DX, LE | 4 Cyl 2.4 L GAS
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Toyota Radiator Cap
Part Number: SU003-10341
$11.17 MSRP: $15.55
You Save: $4.38 (29%)
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Product Specifications
- Other Name: Cap Assembly; Cap; Cap Sub-Assembly, Radiator
- Replaces: SU003-01184
Fits the following Toyota Models:
- 86 | 2017-2020 | Base, GT, Hakone Edition, Special Edition, TRD Special Edition | 4 Cyl 2.0 L GAS
- GR86 | 2022-2023 | 10th Anniversary Special Edition, Base, Premium | 4 Cyl 2.4 L GAS
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Toyota Cap
Part Number: 16405-74171
$37.76 MSRP: $52.56
You Save: $14.80 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Radiator Cap
Fits the following Toyota Models:
- Camry | 1992-1994 | DLX, DX, LE, XLE | 4 Cyl 2.2 L GAS
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Toyota Radiator Cap
Part Number: 16401-WB001
$27.57 MSRP: $38.37
You Save: $10.80 (29%)
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Product Specifications
- Other Name: Cap Sub-Assembly, Radiator
Fits the following Toyota Models:
- Yaris | 2019-2020 | L, LE, XLE | 4 Cyl 1.5 L GAS
- Yaris iA | 2017-2018 | Base | 4 Cyl 1.5 L GAS
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Toyota Reservoir Cap
Part Number: 16405-0D010
$31.62 MSRP: $44.01
You Save: $12.39 (29%)
Ships in 1-3 Business Days
Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Engine Coolant Reservoir Cap; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- Corolla | 1998-2002 | CE, LE, S, VE | 4 Cyl 1.8 L GAS
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Toyota Reservoir Cap
Part Number: 16405-15100
$14.45 MSRP: $20.11
You Save: $5.66 (29%)
Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- Corolla | 1996-1997 | Base, CE, DX, LE | 4 Cyl 1.6 L GAS, 4 Cyl 1.8 L GAS
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Toyota Reservoir Cap
Part Number: 16405-28020
$18.87 MSRP: $26.26
You Save: $7.39 (29%)
Ships in 1-3 Business Days
Product Specifications
- Other Name: Cap Sub-Assembly, Reservoir; Engine Coolant Reservoir Cap; Cap; Cap Sub-Assembly, Reserve Tank
Fits the following Toyota Models:
- RAV4 | 2001-2005 | Base, L, Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS, BATTERY EV (EV/BEV)

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Toyota Radiator Cap

OEM parts deliver unmatched quality you can rely on. They pass extensive quality control inspections. Toyota produces them to the official factory specifications. This process helps prevent defects and imperfections. So you can get exceptional lifespan and a flawless fit. Need new OEM Toyota Radiator Cap? You'll love our wide selection of genuine options. Shop in minutes and skip the hunt. Our prices are unbeatable, you'll save time and money. It's easy to shop and find the right piece. Our committed customer service team gives professional help from start to finish. Every part includes a manufacturer's warranty. We ship quickly, your parts will arrive fast at your door.

The Toyota Radiator Cap ensures the hot water stays locked allowing the driver to maintain cooling without any boil over drama, which reflects the same production logic Toyota has pushed forward since starting in 1937. Toyota was born in Japan and shook the world market with the lean production, waste cutting and the flexible TNGA floor that trickled into every platform. Modern milestones like the 2022 Hybrid Synergy Drive and the 2024 RAV4 Plug-in Hybrid with 42 electric miles show that this innovative spirit percolates into the Radiator Cap. This small part regulates the entire thermal loop of the vehicle. The Radiator Cap is a metal and rubber lid located on the radiator, is designed to guide the water, maintain the pressure, minimize leaks, and shield the neck against vibration. This lid is easily swapped after the Toyota seal is wiped and the gasket is inspected for splits using a bright light. Never open a hot system to avoid steam burns. Yank the old cap off the neck and wipe out the grit and residue from the sealing ring. Install the new Radiator Cap, align the lugs and secure the cap clockwise until the Radiator Cap is seated firmly. Check for drips, start the Toyota, and hear a quiet hiss, which means you have succeeded.

Toyota Radiator Cap Parts and Q&A

Radiator Cap
16475-28140
Q: What is the importance of the radiator cap in the cooling system and how does its service and repair contribute to optimal performance on Toyota Celica?
A:
The radiator cap helps maintain the cooling system work correctly so repair and service need understanding how it fits with the overall system. Regularly checking the radiator cap helps keep the cooling system working well and avoids engine overheating issues.