Could also be something as simple as a radiator cap.
Pros: simple fix
Vehicle:
Honda
Reviews of OEM Honda radiator cap
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6 votes
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2 reviews
Description
OEM Honda
Japan
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Honda Radiator Cap 19045-PAA-A01. Accept no substitutions. Those aftermarket-OEM (Murray or whatever from O'Reilly's and Autozone) are JUNK. I've had several. I'm now on my second HONDA one, not due to design flaw but due to driving my car with a breeched head gasket for 3 years. The parts house ones NEVER lasted nearly as long (only about ten stops or so for me).
Pros: long lasting, reliable, OEM quality
Cons: aftermarket junk, short lifespan
Vehicle:
Honda Civic
Part number: 19045-PAA-A01
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What we know about OEM Honda radiator cap
The brand is registered in Japan.
In March 2026, PartReview does not yet have a formed opinion of OEM Honda radiator cap. You can help by adding a review for OEM Honda radiator cap.
Currently there are 2 reviews and 6 votes. Average rating — 5 out of 5. Vote balance: 6 up, 0 down.
Users also evaluated the qualities of OEM Honda radiator cap:
- Seal - no coolant weeping around the cap neck - rated positively. 5 points out of 5.
- Overheat control - engine temp remains normal on hot days - rated positively. 5 points out of 5.
- Hose feel - upper hose feels firm but not rock hard when hot - no rating yet
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