The Honda 91201-ZG4-003 Oil Seal (37X64X10) is a genuine OEM component designed for the GD320 horizontal shaft diesel engine. As a direct Honda OEM part, it is manufactured to the exact dimensions and material tolerances specified for this application, ensuring a proper, leak-free installation. Honda supersedes parts at serial breaks, so confirm your engine's serial number against the fitment table before ordering to ensure part number 91201-ZG4-003 is the correct seal for your unit.
Key Features
- Genuine OEM Sealing Integrity — manufactured to Honda's exact dimensional specification for the GD320 diesel, delivering the lip geometry and interference fit needed to prevent oil leakage at the sealed shaft interface
- Exact-Size Replacement — the 37×64×10 mm dimensions are specific to this application; verify your serial number against the fitment table to confirm this is the correct seal for your engine
- GD320 Diesel Fitment — sourced directly from Honda's parts catalogue for the GD320 horizontal shaft diesel engine
- Leak Prevention — a worn or degraded oil seal allows engine oil to escape past the rotating shaft, leading to oil loss, external contamination, and potential engine damage if left unaddressed
An oil seal is a precision lip seal fitted around a rotating shaft — typically the crankshaft or a camshaft output — to retain engine oil inside the engine while keeping dirt and debris out. The seal's inner lip rides against the shaft surface and relies on an exact dimensional fit to maintain consistent contact pressure. On the GD320 diesel engine, a compromised seal allows oil to migrate past the shaft, resulting in visible external leaks, dropping oil levels, and the risk of oil reaching components where it can cause secondary damage. Replacing a failed seal with a correctly sized genuine OEM part restores the original sealing performance and stops oil loss at its source.
Part Details
| Part Number | 91201-ZG4-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Oil Seal (37X64X10) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Diesel Engine | GD320 | 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.
