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Product Details
The Honda OEM Radiator Cap is a genuine factory replacement designed for a wide range of Honda and Acura vehicles, including the Civic, Accord, CR-V, RSX, Integra, and S2000. Manufactured to Honda's original equipment specifications, this Denso radiator cap helps maintain proper cooling system pressure for reliable engine temperature regulation.
A properly functioning radiator cap is essential for maintaining the cooling system's designed operating pressure, helping prevent coolant loss and overheating. Over time, radiator cap seals and internal pressure valves can deteriorate, potentially causing coolant leaks, overheating, or inconsistent cooling system performance.
This genuine Honda radiator cap provides factory-quality construction, precise fitment, and dependable sealing. It's an excellent replacement during cooling system maintenance, radiator replacements, and engine rebuilds.
Features
- Genuine Honda OEM Part: Factory-quality construction and precise fitment.
- Denso Radiator Cap: Original equipment-style replacement for compatible Honda and Acura vehicles.
- Maintains Cooling System Pressure: Helps regulate pressure for efficient engine cooling.
- Prevents Coolant Loss: Provides a secure seal at the radiator filler neck.
- Pressure Relief Valve: Allows excess cooling system pressure to be released as designed.
- Direct Factory Replacement: Fits compatible factory radiator assemblies.
- Durable Construction: Designed to withstand repeated heating and cooling cycles.
- OEM Part Number: 19045-PAA-A01.
Additional Information
- Manufacturer: Honda / Acura
- Part Number: 19045-PAA-A01
- OEM Description: Cap, Radiator (Denso)
- Product Type: Radiator Pressure Cap
- Replaces: 19045-P08-013 / 19045-PY3-003 / 19045-PY3-013
- Installation Location: Radiator Filler Neck
- Quantity: Sold Individually
Installation Notes
- Always allow the engine and cooling system to cool completely before removing the radiator cap. Inspect the radiator filler neck and sealing surfaces for corrosion, cracks, or damage before installing the replacement.
- Ensure the cap is fully seated and secured to maintain proper cooling system pressure.
Note:
- Includes one genuine Honda radiator cap. Radiator, coolant reservoir, hoses, and additional cooling system components are sold separately.
For aftermarket radiators or K-Series engine swaps, verify radiator neck compatibility and the required pressure rating before ordering.
| Part Number: | 19045-PAA-A01 |
| Brand: | Honda |
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
Vehicle Fitment
This part does not have vehicle specific fitment. Please contact us if you need assistance.
1 Reviews ★★★★★
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Landon | January 29th, 2026
Exactly what I expected. Definitely a lot cleaner than the OEM black
