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Honda

Genuine Honda 19045-PAA-A01 Radiator Cap

  • Based on 1,102 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Sep 21
Order within 7 hours and 26 minutes
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Features

  • Package Dimension : 11 " L x 7 " W x 3 " H
  • Country of Origin: CHINA
  • Model Number : 19045-PAA-A01
  • Item Package Weight : 2 pounds

Description

GET ON THE WATER

Brand: Honda


Color: Chrome or Silver


Material: Metal


Exterior Finish: Chrome" or "Silver


Item dimensions L x W x H: 3.2 x 2.6 x 0.6 inches


Brand Name: Honda


Model Number: 19045-PAA-A01


Manufacturer Part Number: 19045-PAA-A01


Number of Items: 1


OEM Equivalent Part Number: 19045-PAA-A01


Manufacturer: Honda


Global Trade Identification Number: 59


Unit Count: 1 Count


Included Components: Genuine Honda CAP, RADIATOR


Item Type Name: ACCESSORIES


Manufacturer Warranty Description: LIMITED WARRANTY


Color: Chrome or Silver


Exterior Finish: Chrome" or "Silver


Style Name: Modern


Material Type: Metal


Item Highlight: Denso


Item Dimensions: 3.2 x 2.6 x 0.6 inches


Item Weight: 9.07 g


Compatible with Vehicle Type: Various (CR-V, Civic, Prelude, Odyssey, Pilot, Accord, Fit, HR-V, Passport, Ridgeline)


Automotive Fit Type: Vehicle Specific Fit


Closure Type: Twist-On


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Sep 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Affirm Pay in 4
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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Seems legit
This works great for the Denso radiator that is in most 05-07 Accords. Needed one that would fit the replacement radiator I bought, because I found out that the Valeo and Denso radiators don't have the same cap. Seems to be working well so far, keeping the fluid in. No complaints.
Reviewed in the United States on February 1, 2026 by Gabe
    • Just as listed
Good quality. Old one was not letting the system breathe and hoses were flattened when it would cool off . New one works correctly
Reviewed in the United States on April 5, 2026 by JIMBOB
    • You get what you pay for. In this case, peace of mind and a cap that work.
First of all, it was original manufacturer equipment, a genuine Honda radiator cap, rather than the knock-off garbage that AutoZone sold me. That AutoZone garbage is actually trashed in several Amazon reviews. I was kind of shocked when I realized that was the cap AutoZone sold me. What are they thinking? It makes me reluctant to buy parts at AutoZone. I originally wanted to buy a different cap, because there are ones available here at half the price for what I paid at AutoZone, but after reading the reviews and the descriptions, I became leery about buying them. Paying half wouldn't do me much good if it didn't work and I ended up having to buy multiple caps. I finally noticed this genuine Honda part. Though it was more than twice as much as the other caps I was looking at, I decided to go with it. Even at that price, though, it was only a couple bucks more than the AutoZone knock-off, so it could still be considered a bargain, considering what it is. The cap fit perfectly (which I guess you'd expect, being a genuine Honda part) and it works. The fluid isn't overheating and boiling anymore, as it sometimes was with the knock-off. And the radiator fluid reservoir is now working properly, which I don't think it was with the knock-off. This is definitely a case of you get what you pay for. ... show more
Reviewed in the United States on September 20, 2023 by Kindle Customer
    • Replacement radiator cap
Review Image by just-one
Review Image by just-one
Brought this radiator cap to replace a worn out one. It is an o.e.m replacement, fits as expected, price point is great, quality as normal for a oem brand, easy to install and haven't noticed any leaks. Happy that it arrived fast and no need to drive to a dealer.
Reviewed in the United States on July 16, 2025 by just-one
    • Recommend replacement
Replaced cap, hoses and coolant. Must have.
Reviewed in the United States on June 7, 2026 by Troy
    • ⭐⭐⭐⭐⭐ Perfect Fit and Reliable
The Genuine Honda 19045-PAA-A01 Radiator Cap fits perfectly and functions exactly like the original. It maintains proper pressure in the cooling system and feels durable and well-made. Installation was easy, and it provides peace of mind knowing you’re using an OEM-quality part designed specifically for Honda vehicles. Overall, a reliable and high-quality radiator cap — exactly what you need for proper cooling system maintenance. ... show more
Reviewed in the United States on December 18, 2025 by Huzaif
    • No issues so far in 95F weather
Still going strong after using it for 1500 miles. My coolant temp goes up and peaks out at to 208F without issues driving in 95F weather.
Reviewed in the United States on August 28, 2026 by Jon N
    • Good Cap
It does the job. Good price
Reviewed in the United States on May 24, 2023 by Alan

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