Genuine Mazda 3 Coolant Reservoir Cap

Coolant Overflow Reservoir Cap

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10 Coolant Reservoir Caps found

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Mazda 3 Radiator Cap Part Number: PX35-15-205B
$25.78 MSRP: $34.38
You Save: $8.60 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cap, Radiator; Filler Cap, Reservoir Cap, Water Manifold Cap
- Replaces: PX35-15-205A, PX35-15-205
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2019-2025 Mazda 3 | 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
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Mazda 3 Cap Part Number: PE01-15-355B
$4.24 MSRP: $5.65
You Save: $1.41 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cap, Sub Tank; Reservoir Cap
- Replaces: PE01-15-355A, PE01-15-355
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2014-2018 Mazda 3 | Grand Touring, I Sport, I Touring, Sport, Touring, i Grand Touring, i SV, s Grand Touring, s Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Radiator Cap Part Number: PE20-15-205
$19.39 MSRP: $25.85
You Save: $6.46 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cap, Radiator
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2014-2018 Mazda 3 | Grand Touring, I Sport, I Touring, Sport, Touring, i Grand Touring, i SV, s Grand Touring, s Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Cap Part Number: LF50-15-205A
$35.63 MSRP: $47.50
You Save: $11.87 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cap, Radiator; Reservoir Cap
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2004-2013 Mazda 3 | Mazdaspeed, S, SP23, i | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Cap Part Number: PX4J-15-355
$4.24 MSRP: $5.65
You Save: $1.41 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cap, Sub Tank; Reservoir Cap
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2021-2025 Mazda 3 | 2.5 Carbon Turbo, 2.5 Turbo, 2.5 Turbo Premium Plus | 4 Cyl 2.5 L GAS
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Mazda 3 Cap Part Number: PEAR-15-355
$8.63 MSRP: $11.50
You Save: $2.87 (25%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cap, Sub Tank; Reservoir Cap
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2014-2018 Mazda 3 | Grand Touring, I Sport, I Touring, Sport, Touring, i Grand Touring, i SV, s Grand Touring, s Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Cap Part Number: PAF1-15-355
$9.43 MSRP: $12.57
You Save: $3.14 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cap, Sub Tank; Reservoir Cap
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2019-2025 Mazda 3 | 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
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Mazda 3 Reservoir Cap Part Number: S551-15-205A
$23.05 MSRP: $30.73
You Save: $7.68 (25%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cap, Radiator; Cap, Reserve Tank Cap
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2021-2025 Mazda 3 | 2.5 Carbon Turbo, 2.5 Turbo, 2.5 Turbo Premium Plus | 4 Cyl 2.5 L GAS
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Mazda 3 Radiator Cap Part Number: PE11-15-205
$31.45 MSRP: $41.93
You Save: $10.48 (25%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cap, Radiator; Filler Cap
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2014-2018 Mazda 3 | Grand Touring, I Sport, I Touring, Sport, Touring, i Grand Touring, i SV, s Grand Touring, s Touring | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS
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Mazda 3 Cap Part Number: Z601-15-205A
Product Specifications
- Other Name: Cap, Radiator; Reservoir Cap
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2012-2013 Mazda 3 | Mazdaspeed, S, i | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS

Mazda 3 Coolant Reservoir Cap

The ability of the Mazda 3 Coolant Reservoir Cap to seal tightly keeps the coolant pure and the pressure balanced, allowing engine temperature to stabilize over the course of every drive. The cap, known for its reliability, prevents moisture and debris from entering, which keeps corroding from happening and protects passages that allow coolant to flow quickly around the engine. A calibrated spring and tight gasket maintain the vacuum that draws fluid back from the overflow tank to the burner, preventing messiness and dangerous air pockets. A more stable pressure will enable the powertrain to maintain optimum combustion temperatures, raising overall efficiency, and making hoses, seals and sensors easier to manage for better safety on board. With little weight for easy checks, the tough plastic or metal construction is resistant to strong antifreeze chemicals. This 2003 launch car was fitted with a threaded neck on the Coolant Reservoir Cap, a size that corresponds to many similar layout caps, allowing the first to fourth generation 3 owner to install it easily. Mazda has made it more user-friendly by keeping the dimensions constant on all versions of the car, whether the vehicle is an early C1-based model or the newer SKYACTIV chassis. Having clean coolant helps Mazda maintain a sharp steering and lively acceleration that drivers can benefit from every day. The enhanced lifetime adds further confidence towards Mazda, which proves a tiny component can make a significant difference. Each Coolant Reservoir Cap is ready to fit straight away so that swapping the original unit out is a fast safeguard against summer heat and winter freeze.

Looking for Coolant Reservoir Cap with proven quality? Choose OEM Coolant Reservoir Cap. Mazda designs and builds them to strict factory specs. Every piece goes through rigorous quality checks. You'll get parts that fit right and work like new. Shop our huge inventory of OEM Mazda 3 parts. Enjoy the highly competitive prices online. Our site is your one-stop shop. Each genuine 3 part includes a manufacturer's warranty. Buy with confidence. Our return policy is simple and hassle-free. In a rush? Choose expedited delivery at checkout. You'll love the streamlined experience from search to checkout to receiving your order.