Honda OEM 18mm Transmission Sealing Washer
Part Number: 90471-PX4-000

Images may be for reference only

Product Details

The Honda OEM Transmission Sealing Washer is a genuine factory replacement designed for use in compatible Honda and Acura transmission assemblies. This precision-engineered washer helps maintain a secure, properly sealed connection at its designated transmission mounting location.

Manufactured to Honda's original equipment specifications, this genuine OEM washer provides the correct fit, material characteristics, and construction for applications requiring part number 90471-PX4-000.

Transmission sealing washers play an important role in preventing fluid seepage around threaded plugs and other serviceable transmission connections. Over time, the original washer may become compressed, damaged, or deformed during maintenance, potentially compromising its ability to maintain a reliable seal.

Whether you're performing routine transmission maintenance, replacing a transmission plug, servicing a manual transmission, or completing a drivetrain rebuild, this genuine Honda OEM Sealing Washer offers a dependable factory-quality replacement.

Features

Genuine Honda OEM Part: Authentic replacement component manufactured to Honda's original equipment specifications.
Transmission Sealing Application: Designed for the designated sealing location on compatible transmission assemblies.
Factory-Correct Fit: Maintains the original washer dimensions and mounting configuration.
Reliable Sealing Performance: Helps prevent transmission fluid seepage when properly installed.
Precision Construction: Provides the correct contact surface for compatible factory components.
Direct OEM Replacement: Replaces the original washer where Honda specifies part number 90471-PX4-000.
Ideal for Transmission Maintenance: Useful during transmission service, plug removal, and drivetrain repairs.
Engine Swap Friendly: Suitable for compatible Honda and Acura transmission assemblies used in engine swap projects.
Individual Replacement: Convenient for replacing a single worn or damaged washer.
OEM Part Number: 90471-PX4-000.

Additional Information

Manufacturer: Honda / Acura
Part Number: 90471-PX4-000
Product Type: OEM Transmission Hardware
Other Names: Transmission Washer / Sealing Washer / Transmission Plug Washer
Installation Location: Transmission Assembly – Application Dependent
Fitment: Select Honda and Acura Applications
Quantity: Sold Individually (1 Washer)

Common Reasons for Replacement

Transmission sealing washers should be inspected whenever the associated plug or mounting component is removed.

Transmission fluid seepage
Flattened or compressed original washer
Damaged or deformed sealing surface
Missing factory washer
Transmission fluid service
Transmission disassembly or rebuilding
Replacement of the associated plug or fastener
Preventive maintenance during drivetrain repairs
Replacing a worn sealing washer helps restore the original sealing arrangement and reduce the likelihood of leaks.

Installation Notes

Before installation, confirm that the replacement washer matches the original component and is correct for the specific transmission assembly.
Inspect the mating surfaces and associated plug or fastener for damage, corrosion, or debris.
Remove the old washer and clean the sealing surfaces before installing the replacement.
Install the new Honda OEM washer in the correct location and orientation according to the factory service manual.
Always follow Honda's specified tightening procedure and torque requirements for the associated transmission component.
Avoid overtightening, as excessive force can damage the threads, washer, or surrounding transmission housing.
After installation, verify the transmission fluid level where applicable and inspect the serviced area for leaks.

Note:

Includes one genuine Honda OEM Transmission Sealing Washer. Transmission plugs, fasteners, fluids, and additional components are sold separately unless otherwise specified.

For Honda and Acura owners performing transmission maintenance or drivetrain repairs, this genuine Honda OEM Sealing Washer provides a factory-quality replacement designed to maintain the original sealing configuration.