The Honda 91352-YG4-000 O-Ring (49X5.7) is a genuine OEM sealing ring designed for Honda WB20, WH15, and WH20 water pumps. As a direct Honda replacement, this O-ring is manufactured to the exact dimensions and material tolerances specified for these pumps, ensuring a proper seal where it counts. This part fits across the WB20, WH15, and WH20 pump models — verify your unit's serial number against the fitment table to confirm this is the correct listing for your machine. Sourcing the OEM part means you're installing the same component Honda built the pump around, with no guesswork on sizing.
Key Features
- Exact OEM Dimensions — at 49x5.7 mm, this O-ring meets the precise cross-section Honda specifies for these water pump applications, so it seats correctly without under- or over-compression
- Genuine Honda OEM Part — sourced directly from Honda, not a generic substitute.
- Broad Pump Compatibility — listed for WB20 general-purpose, WH15 high-pressure, and WH20 water pumps; check your serial number against the fitment table to confirm the correct application
- Leak Prevention — a degraded or incorrectly sized O-ring allows water to bypass the seal, reducing pump output pressure and flow; replacing it with this correctly sized OEM ring restores a proper fluid-tight seal
An O-ring is a circular elastomeric seal that sits in a machined groove and compresses between two mating surfaces to prevent fluid from passing between them. In a water pump, O-rings are used at critical joints within the pump's housing and plumbing connections to maintain a sealed fluid path and sustain operating pressure. When an O-ring hardens, cracks, or takes a permanent set from heat and age, the seal breaks down — the pump loses pressure, output drops, and water may leak externally at the joint. Replacing a worn O-ring with the correct OEM part restores the sealed system the pump relies on to move water efficiently.
Part Details
| Part Number | 91352-YG4-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | O-Ring (49X5.7) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WB20 | 3044855-9999999 |
| Water Pump | WH15, WH20 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
