Honda 19045RAA003 — Radiator Cap
Overview
Radiator cap Honda 19045RAA003 regulates system pressure within the engine cooling circuit to prevent coolant boiling under high operating temperatures. The integrated dual-valve spring mechanism operates at a calibrated relief pressure of 1.1 bar (108 kPa), diverting excess fluid to the expansion tank during thermal expansion. As the engine cools down, the secondary vacuum return valve opens, drawing coolant back into the primary circuit. Manufactured with a pressed zinc-plated steel body and synthetic EPDM rubber sealing gaskets resistant to ethylene glycol degradation. Main valve plunger diameter measures 28 mm, with an overall cap depth of 16 mm. Original equipment reference 19045-RAA-003, with catalogue cross-references including DENSO 022510-1570, GATES 31336, FEBI BILSTEIN 103092, and NIPPARTS N1554001.
Fits Honda Accord Mk7 and Mk8 (2003–2012), Civic Mk7 and Mk8 (2001–2011), CR-V Mk2 and Mk3 (2002–2011), Element (2003–2011), FR-V (2004–2009), and Legend Mk4 (2006–2012) models with 1.8, 2.0, 2.4, and 3.5 petrol engines. Replacement is necessary when rubber seals harden or crack, internal springs suffer mechanical fatigue, fluid traces appear around the neck filler, or coolant regularly overflows. Operating with a jammed pressure valve risks radiator end-tank cracking, coolant hose rupture, and persistent engine overheating.
Honda 19045RAA003 — radiator cap. 5 offers available, starting from 36.11 USD.
Specifications
Manufacturer — Honda. Article number — 19045RAA003. Name — Radiator Cap. Offers — 5. From — 36.11 USD.
Compatible cross-references
Replacements and analogues: 3RG 82214, ABAKUS 018027001, AIC 56050, JAPANPARTS KHC30, JAPANPARTS KHC32.
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