• Honda Genuine 31190-RRA-A00 Idler Pulley
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Honda

Honda Genuine 31190-RRA-A00 Idler Pulley

Honda Genuine 31190-RRA-A00 Idler Pulley

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✔ Genuine Honda 31190-RRA-A00 Idler Pulley — OEM Part
✔ Fitment: Honda Civic Si (2002–2011) with K20 engine, 2009 Acura TSX
✔ Direct replacement for factory idler pulley — no modifications required
✔ Manufactured to Honda’s original specifications
✔ Precisely engineered bearing — withstands high rotational speeds
✔ Essential component — maintains serpentine belt tension and alignment

 

Genuine Honda 31190-RRA-A00 Idler Pulley — for K-Series Engines

A squealing or chirping noise from the engine bay, visible belt wear, or a slipping accessory belt — these are common signs that the idler pulley may need replacement . The idler pulley maintains correct routing and tension of the serpentine belt, ensuring reliable operation of engine accessories . A worn pulley can cause belt slip, excessive noise, and potential failure of the auxiliary drive system .

This is a factory-original Honda idler pulley (OE part number 31190-RRA-A00), designed for K-series engines. It features a high-grade internal bearing that withstands sustained high rotational speeds . The pulley is a direct fit for the factory application and requires no modifications. This is the same part sold at Honda dealerships.

 

 

When to Replace

• Squealing or chirping noise from the engine bay
• Visible belt wear or fraying
• Slipping accessory belt
• The pulley bearing is rough, noisy, or seized
• You are replacing the serpentine belt and need a new pulley

Product Details & Highlights

• ✔ Genuine Honda OEM — not an aftermarket or Chinese replica
• ✔ High-grade bearing — withstands sustained rotational speeds • ✔ Direct replacement — fits factory application
• ✔ Manufactured to Honda’s strict quality standards
• ✔ Backed by Honda’s manufacturer warranty (valid through any authorized dealer)

Package Contents

Package Contents• 1 × Honda 31190-RRA-A00 idler pulley (genuine)

FAQ

FAQ

Is this a genuine Honda part or a copy?
This is 100% genuine Honda OEM — in original factory packaging with Honda part number printed on the label. It is not an aftermarket brand or a replica .

Does this fit my 2005 Honda Civic Si?
Yes — the 2005 Civic Si with the K20 engine uses this idler pulley .

Does this fit my 2011 Honda Civic Si?
Yes — the 2011 Civic Si uses this idler pulley. Please verify with your VIN.

Can I use this pulley on a different Honda model?
This pulley is designed for specific K-series engines . Other Honda models may require a different pulley.

Does this pulley come with the mounting bolt?
No — the mounting bolt is a separate part and is typically reused from the original installation.

Does this pulley fit the Acura TSX?
Yes — the 2009 Acura TSX uses this idler pulley .

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