Genuine Mazda 6 Coolant Reservoir Cap

Coolant Overflow Reservoir Cap

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13 Coolant Reservoir Caps found

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Mazda 6 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:
- 2019-2021 Mazda 6 | Carbon Edition, Grand Touring, Grand Touring Reserve, Signature | 4 Cyl 2.5 L GAS
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Mazda 6 Radiator Cap Part Number: PE01-15-205
$25.91 MSRP: $34.56
You Save: $8.65 (26%)
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:
- 2014-2017 Mazda 6 | Grand Touring, Sport, Touring | 4 Cyl 2.5 L GAS
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Mazda 6 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:
- 2014-2021 Mazda 6 | Grand Touring, Sport, Touring | 4 Cyl 2.5 L GAS
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Mazda 6 Cap Part Number: L327-15-355
$3.65 MSRP: $4.87
You Save: $1.22 (26%)
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Product Specifications
- Other Name: Cap, Sub Tank; Reservoir Cap
- Replaces: L5A3-15-355
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2011-2013 Mazda 6 | i | 4 Cyl 2.5 L GAS
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Mazda 6 Radiator Cap Part Number: L3R1-15-205
$4.74 MSRP: $6.32
You Save: $1.58 (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:
- 2007-2008 Mazda 6 | i | 4 Cyl 2.3 L GAS
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Mazda 6 Cap Part Number: PYG6-15-355
$5.21 MSRP: $6.96
You Save: $1.75 (26%)
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:
- 2018-2021 Mazda 6 | Carbon Edition, Grand Touring, Grand Touring Reserve, Signature | 4 Cyl 2.5 L GAS
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Mazda 6 Radiator Cap Part Number: L321-15-205
$7.81 MSRP: $10.42
You Save: $2.61 (26%)
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:
- 2003-2008 Mazda 6 | Mazdaspeed, S, i | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Reservoir Cap Part Number: L321-15-355
$8.95 MSRP: $11.94
You Save: $2.99 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cap, Sub Tank
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2003-2008 Mazda 6 | Mazdaspeed, S, i | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Cap Part Number: AJ57-15-205
$13.25 MSRP: $17.67
You Save: $4.42 (26%)
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:
- 2003-2013 Mazda 6 | Mazdaspeed, S, i | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.7 L GAS
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Mazda 6 Radiator Cap Part Number: LF21-15-205
$22.41 MSRP: $29.90
You Save: $7.49 (26%)
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:
- 2006-2007 Mazda 6 | Mazdaspeed, S, i | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 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:
- 2014-2021 Mazda 6 | Grand Touring, Grand Touring Reserve, Signature, Sport, Touring | 4 Cyl 2.5 L GAS
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Mazda 6 Radiator Cap Part Number: L3R4-15-205
Product Specifications
- Other Name: Cap, Radiator
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2011-2013 Mazda 6 | i | 4 Cyl 2.5 L GAS
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Mazda 6 Reservoir Cap Part Number: L3K9-15-355A
Product Specifications
- Other Name: Cap, Sub Tank
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2006-2007 Mazda 6 | Mazdaspeed | 4 Cyl 2.3 L GAS

Mazda 6 Coolant Reservoir Cap

The Mazda 6 Coolant Reservoir Cap provides a secure seal that prevents air intrusion and coolant loss, ensuring consistent temperature control on every drive. Resulting from heat tolerant materials, the cap can withstand constant expansion and contraction without cracking, which is why it now has a great reputation for reliability and durability. This dependable Mazda part is intended for longevity. Its precisely molded surfaces fit snugly against the lip of the reservoir to maintain closed-loop pressure, allowing coolant to flow out to and return from the engine so that engine temperatures stay stable during brisk acceleration and when caught in traffic. If you own a first-generation sedan or wagon, Mazdaspeed 6, or current Mazda 6, you'll appreciate the fact that this design slots right onto the factory recovery tank without fuss and gives confidence on more than one generation of the vehicle. The Coolant Reservoir Cap prevents moisture and dirt from entering, which prevents contamination of the coolant, minimizing corrosion in passages and improving engine performance. A stable thermal environment minimizes risks of sudden overheating, making occupants safer and easing the burden on other cooling devices. The incredibly simple twist-on install, tough gasket, and calibrated venting pressure make this cap an exceptional part in the crowded automotive market, proving that even small parts can produce a significant difference in daily drivability. While faithful Mazda drivers may not always think much of their car's Coolant Reservoir Cap, this little piece of technology acts as a shield against heat related damage.

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 6 parts. Enjoy the highly competitive prices online. Our site is your one-stop shop. Each genuine 6 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.