Honda serpentine belt 04301-RNA-306 – Civic 1.8 / CR-V 2.0 (7PK2061)

Honda serpentine belt 04301-RNA-306 – 7PK2061

Genuine Honda multi-rib serpentine belt with profile 7PK2061, used to drive the engine accessories (alternator, A/C compressor, water pump and auxiliary pulleys) in selected Honda Civic and CR-V models with engines R18A and R20A. The belt ensures proper grip on the pulleys, quiet operation and reliable power transfer in everyday use.

Service part number 04301-RNA-306 functions as an updated belt kit and supersedes earlier numbers 04301-RNA-305, 31110-RNA-004, 31110-RWK-003 and 31110-RWK-004. The marking 31110-RWK-004 may still be visible on the belt itself – this is correct and means the belt meets the latest Honda specification, while the external number 04301-RNA-306 is used for the complete service kit.

Together with the belt Honda supplies a small leaflet showing the correct, revised routing on the pulleys. In some engines the belt path was changed compared with early versions, so when installing a new belt you must follow the new diagram. Incorrect routing can cause slip, noise or premature wear.

Applications – Honda models with R18A and R20A engines

• Honda Civic 3D (2007–2011) – 1.8 petrol, engine R18A2
• Honda Civic 4D (2007–2011) – 1.8 petrol, engines R18A1 and R18A2
• Honda Civic 5D (2007–2011) – 1.8 petrol, engine R18A2
• Honda CR-V III (2007–2012) – 2.0 petrol, engine R20A1

Why choose the 04301-RNA-306 serpentine belt kit?

• Genuine Honda specification – correct length, profile and stiffness for R18A and R20A engines.
• Updated routing – supplied as a service kit with a diagram showing the new belt path on the pulleys.
• Quiet and smooth operation – minimises belt slip, squealing and vibrations at idle and high revs.
• Durable construction – resistant to temperature changes, oil mist and everyday city or motorway use.
• Perfect fit – no need to “guess” the length; the belt fits the original tensioner and accessory pulleys.

FAQ – Honda serpentine belt 04301-RNA-306

Does 04301-RNA-306 replace 31110-RWK-004 and 31110-RNA-004?
Yes. Part number 04301-RNA-306 is used by Honda as the service kit that replaces 04301-RNA-305, 31110-RNA-004, 31110-RWK-003 and 31110-RWK-004. The belt itself can still carry the marking 31110-RWK-004 – that is the internal belt number printed on the rubber, while 04301-RNA-306 is the catalog service number.

Can I install this belt using the old routing?
No. Honda changed the belt routing on some engines and 04301-RNA-306 is designed for the new belt path. Always follow the diagram included in the kit or the instructions from the workshop manual. Incorrect routing may cause noise, loss of charging or damage to the belt.

When should the serpentine belt be replaced?
Replace the belt if you notice cracks, glazing, frayed edges, chirping or squealing noises, or according to the mileage/age specified in the service schedule. It is also a good idea to inspect the tensioner and idler pulleys and replace them if there is any play or noise.

How can I be sure this belt fits my car?
The easiest way is to compare the engine code (R18A / R20A) and model with the list above. If you are not sure, contact us with your VIN – we will verify compatibility before purchase.