Genuine Mazda Radiator Cap

Cooling Radiator Cap

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41 Radiator Caps found

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Mazda Radiator Cap Part Number: L321-15-205
$7.79 MSRP: $10.39
You Save: $2.60 (26%)
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Product Specifications
- Other Name: Cap, Radiator
Fits the following Mazda Models:
- 6 | 2003-2008 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda Cap Part Number: KL01-15-205
$17.43 MSRP: $23.24
You Save: $5.81 (25%)
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Product Specifications
- Other Name: Cap, Radiator Sub Tank; Cap, Reservoir Cap
Fits the following Mazda Models:
- 626 | 1998-2002 | DX, ES, LX | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
- MPV | 2000-2006 | DX, ES, LX, LX-SV | 6 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS
- Miata | 1999-2003 | 10th Anniversary, Base, LS, SE, Shinsen | 4 Cyl 1.8 L GAS
- Millenia | 1995-2002 | Base, L, Millennium Edition, S | 6 Cyl 2.3 L GAS, 6 Cyl 2.5 L GAS
- Protege | 1999-2003 | DX, ES, LX, Mazdaspeed, MP3 | 4 Cyl 1.6 L GAS, 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L GAS
- Protege5 | 2002-2003 | Base | 4 Cyl 2.0 L GAS
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Mazda Radiator Cap Part Number: PE20-15-205
$19.33 MSRP: $25.77
You Save: $6.44 (25%)
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Product Specifications
- Other Name: Cap, Radiator
Fits the following Mazda Models:
- 3 | 2014-2018 | Grand Touring, i Grand Touring, I Sport, i SV, I Touring, s Grand Touring, s Touring, Sport, Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda Radiator Cap Part Number: LFB7-15-205
$20.75 MSRP: $27.67
You Save: $6.92 (26%)
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Product Specifications
- Other Name: Cap, Radiator; Filler Cap
Fits the following Mazda Models:
- 2 | 2011-2014 | Sport, Touring | 4 Cyl 1.5 L GAS
- 5 | 2012-2015, 2006-2010 | Grand Touring, Sport, Touring | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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Mazda Radiator Cap Part Number: LF21-15-205
$22.35 MSRP: $29.81
You Save: $7.46 (26%)
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Product Specifications
- Other Name: Cap, Radiator
Fits the following Mazda Models:
- 6 | 2006-2007 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda Radiator Cap Part Number: LFH1-15-205
$23.61 MSRP: $31.49
You Save: $7.88 (26%)
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Product Specifications
- Other Name: Cap, Radiator
Fits the following Mazda Models:
- CX-7 | 2007-2012 | Grand Touring, Sport, Touring | 4 Cyl 2.3 L GAS
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Mazda Radiator Cap Part Number: PE01-15-205
$25.84 MSRP: $34.45
You Save: $8.61 (25%)
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Product Specifications
- Other Name: Cap, Radiator
Fits the following Mazda Models:
- 6 | 2014-2017 | Grand Touring, Sport, Touring | 4 Cyl 2.5 L GAS
- CX-3 | 2016-2021 | Grand Touring, Sport, Touring | 4 Cyl 2.0 L GAS
- CX-5 | 2013-2024 | 2.5 S, 2.5 S Carbon Edition, Carbon Edition, Grand Select, Grand Touring, Sport, Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
- CX-9 | 2016-2023 | Carbon Edition, Grand Touring, Signature, Sport, Touring, Touring Plus | 4 Cyl 2.5 L GAS
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Mazda Radiator Cap Part Number: 8871-15-205
$26.54 MSRP: $35.40
You Save: $8.86 (26%)
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Product Specifications
- Other Name: Cap, Radiator
Fits the following Mazda Models:
- RX-7 | 1984-1985 | GS, GSL, GSL-SE, S | 2 Cyl 1.1 L GAS, 2 Cyl 1.3 L GAS
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Mazda Radiator Cap Part Number: SH17-15-205
$27.25 MSRP: $36.34
You Save: $9.09 (26%)
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Product Specifications
- Other Name: Cap, Radiator; Radiator Cap
Fits the following Mazda Models:
- CX-5 | 2019 | Signature | 4 Cyl 2.2 L DIESEL
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Mazda Radiator Cap Part Number: PX35-15-205B
$25.70 MSRP: $34.27
You Save: $8.57 (26%)
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Product Specifications
- Other Name: Cap, Radiator; Filler Cap, Radiator Cap, Reservoir Cap
- Replaces: PX35-15-205, PX35-15-205A
Fits the following Mazda Models:
- 3 | 2019-2024 | 2.0, 2.5 Carbon Turbo, 2.5 S, 2.5 Turbo, 2.5 Turbo Premium Plus, Base, Carbon Edition, Preferred, Premium, Select, Select Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
- 6 | 2019-2021 | Carbon Edition, Grand Touring, Grand Touring Reserve, Signature | 4 Cyl 2.5 L GAS
- CX-30 | 2020-2023 | 2.5 S, 2.5 S Carbon Edition, 2.5 Turbo, Base, Preferred, Premium, Select | 4 Cyl 2.5 L GAS
- CX-5 | 2019-2024 | 2.5 Turbo, 2.5 Turbo Signature, Carbon Edition Turbo, Grand Touring Reserve, Signature | 4 Cyl 2.5 L GAS
- CX-50 | 2023-2024 | 2.5 S, 2.5 Turbo | 4 Cyl 2.5 L GAS
- MX-30 EV | 2022-2023 | Base, Premium Plus | BATTERY EV (EV/BEV)
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Mazda Cap Part Number: D316-15-205
$28.48 MSRP: $37.98
You Save: $9.50 (26%)
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Product Specifications
- Other Name: Cap, Radiator; Cap, Reservoir Cap
- Replaces: D316-15-205-PT, N350-15-205
Fits the following Mazda Models:
- 323 | 1986-1994 | Base, DX, LX, SE | 4 Cyl 1.6 L GAS
- 626 | 1988-1992 | DX, GT, LE, LX, Turbo, Turbo 4WS | 4 Cyl 2.2 L GAS
- 929 | 1988-1995 | Base, S | 6 Cyl 3.0 L GAS
- MPV | 1989-1998 | Cargo, DX, ES, L, LX, LXE, Passenger | 4 Cyl 2.6 L GAS, 6 Cyl 3.0 L GAS
- MX-3 | 1992-1995 | Base | 4 Cyl 1.6 L GAS
- MX-6 | 1988-1992 | DX, GT, GT 4WS, LE, LX | 4 Cyl 2.2 L GAS
- Miata | 1990-1997 | Base, LE, M Edition, SE, STO | 4 Cyl 1.6 L GAS, 4 Cyl 1.8 L GAS
- Protege | 1990-1998 | 4WD, Base, DX, ES, LX, SE | 4 Cyl 1.5 L GAS, 4 Cyl 1.8 L GAS
- RX-7 | 1986-1991 | 10th Anniversary, Base, Base 2+2, Convertible, GTU, GTUs, GXL, GXL 2+2, LX, LX 2+2, SE, SE 2+2, Sport, Turbo | 2 Cyl 1.3 L GAS
- RX-8 | 2004-2005 | Base, Shinka | 2 Cyl 1.3 L GAS
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Mazda Cap Part Number: KF01-15-205
$28.63 MSRP: $38.18
You Save: $9.55 (26%)
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Product Specifications
- Other Name: Cap, Radiator; Cap
- Replaces: N323-15-205
Fits the following Mazda Models:
- 626 | 1993-1994 | ES, LX | 6 Cyl 2.5 L GAS
- MX-6 | 1993-1994 | LS | 6 Cyl 2.5 L GAS
- RX-7 | 1993-1995, 1986-1990 | 10th Anniversary, Base, Base 2+2, Convertible, GTU, GTUs, GXL, GXL 2+2, LX, LX 2+2, R1, R2, SE, SE 2+2, Sport, Touring, Turbo | 2 Cyl 1.3 L GAS
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Mazda Cap Part Number: KL11-15-205A
$28.06 MSRP: $37.42
You Save: $9.36 (26%)
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Product Specifications
- Other Name: Cap, Radiator; Cap
- Replaces: KL11-15-205
Fits the following Mazda Models:
- 626 | 1993-1997 | ES, LX | 6 Cyl 2.5 L GAS
- MX-6 | 1993-1997 | LS, M Edition | 6 Cyl 2.5 L GAS
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Mazda Radiator Cap Part Number: PE11-15-205
$31.35 MSRP: $41.81
You Save: $10.46 (26%)
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Product Specifications
- Other Name: Cap, Radiator; Filler Cap
Fits the following Mazda Models:
- 3 | 2014-2018 | Grand Touring, i Grand Touring, I Sport, i SV, I Touring, s Grand Touring, s Touring, Sport, Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
- 6 | 2014-2021 | Grand Touring, Grand Touring Reserve, Signature, Sport, Touring | 4 Cyl 2.5 L GAS
- CX-5 | 2019 | Grand Touring Reserve, Signature | 4 Cyl 2.5 L GAS
- MX-5 Miata | 2016-2023 | 100th Anniversary Special Edition, Club, Grand Touring, RF 100th Anniversary Special Edition, RF Club, RF Grand Touring, RF GT, Sport | 4 Cyl 2.0 L GAS
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Mazda Radiator Cap Part Number: K817-15-205
$30.36 MSRP: $40.49
You Save: $10.13 (26%)
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Product Specifications
- Other Name: Cap, Radiator
- Replaces: N321-15-205
Fits the following Mazda Models:
- MX-3 | 1992-1995 | Base, GS, Precedia, SE | 6 Cyl 1.8 L GAS
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Mazda Filler Neck Part Number: LFB7-15-17YA
$75.18 MSRP: $100.25
You Save: $25.07 (26%)
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Product Specifications
- Other Name: Cap Set, Filler-Radiator; Filler Cap
Fits the following Mazda Models:
- 5 | 2006-2010 | Grand Touring, Sport, Touring | 4 Cyl 2.3 L GAS
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Mazda Radiator Cap Part Number: L3R1-15-205
$4.73 MSRP: $6.31
You Save: $1.58 (26%)
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Product Specifications
- Other Name: Cap, Radiator
Fits the following Mazda Models:
- 6 | 2007-2008 | i | 4 Cyl 2.3 L GAS
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Mazda Radiator Cap Part Number: YF47-15-205
$17.31 MSRP: $23.09
You Save: $5.78 (26%)
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Product Specifications
- Other Name: Cap, Radiator; Radiator Cap
Fits the following Mazda Models:
- MPV | 2006 | ES, LX, LX-SV | 6 Cyl 3.0 L GAS
- Miata | 2004-2005 | Base, LS, Mazdaspeed | 4 Cyl 1.8 L GAS
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Mazda Cap Part Number: KL61-15-205
Product Specifications
- Other Name: Cap, Radiator; Cap
Fits the following Mazda Models:
- 626 | 1995-2002 | ES, LX | 6 Cyl 2.5 L GAS
- MX-3 | 1995 | Precedia | 6 Cyl 1.8 L GAS
- MX-6 | 1995-1997 | LS, M Edition | 6 Cyl 2.5 L GAS
- Millenia | 1995-2002 | Base, L | 6 Cyl 2.5 L GAS
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Mazda Radiator Cap Part Number: 1F71-15-205
Product Specifications
- Other Name: Cap, Radiator; Reservoir Cap
- Replaces: 1F20-15-205, 1F70-15-205
Fits the following Mazda Models:
- B2300 | 2001-2009 | Base, SE, SX | 4 Cyl 2.3 L GAS

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Mazda Radiator Cap

The Mazda Radiator Cap ensures that the engine coolant is maintained at exact pressure, protecting all vehicles in the lineup from overheating while making daily driving a worry-free experience. Mazda started making a name for itself in 1931 and soon after excited drivers with the high revving rotary engine, then pushed the envelope for efficiency with Skyactiv powertrains that cut fuel consumption without sacrificing performance. The company embraces Kodo Soul of Motion styling so that each curve looks ready to leap and complements that energy with i-Activsense aids that watch lanes, read traffic and inspire confidence. Mazda is also experimenting with electric drive, mild hybrids, and rugged i-Activ AWD tests at rough tracks to ensure that fun handling is not lost when the weather turns foul. Matching that philosophy, the Radiator Cap employs a sealed spring valve, which holds roughly 16 PSI, raises the boiling point, but sends excess coolant to an overflow tank when things get too hot, before pulling it back once things cool off. This simple component prevents messy coolant loss, prevents air pockets from forming and keeps the entire Mazda family in a constant state of thermal balance so that engines, pumps and hoses are protected. Replacing a worn Radiator Cap restores factory pressure instantly, allowing each and every spirited Mazda to continue to cruise confidently through traffic or twisty back roads.

You'll get great performance and real durability when you pick genuine OEM Radiator Cap. Mazda builds these using high-quality materials and official factory methods to ensure they hold up mile after mile. You deserve that Mazda reliability without the headache of cheap knockoffs. It is easy to find exactly what you need in our huge inventory of genuine parts. Plus, every OEM part carries a real manufacturer's warranty for your peace of mind. You will love our low prices too. Order today and we will ship your brand-new parts fast. They often reach your door in just a few days.