Restore proper power steering system sealing and eliminate common power steering pump air leaks with the Genuine Honda Power Steering Pump Inlet O-Ring (91345-RDA-A01). This factory replacement O-ring is designed to seal the power steering fluid inlet connection at the pump on compatible Honda and Acura vehicles.

Manufactured to Honda's original equipment specifications, this precision-molded O-ring measures 13.0mm x 1.9mm and features a distinctive red-colored design. It replaces earlier Honda O-ring part numbers 91345-PAA-A01 and 91345-PDA-E01.

A worn power steering pump inlet O-ring is a common cause of whining or groaning noises in Honda hydraulic power steering systems. As the original seal ages, it can harden, flatten, or lose elasticity, allowing air to enter the pump's suction side. This can create air bubbles in the power steering fluid, resulting in foaming, pump noise, and inconsistent steering assistance.

Replacing the deteriorated seal with the updated Genuine Honda 91345-RDA-A01 O-ring can help restore proper suction-side sealing, reduce air intrusion, and improve power steering system operation.

Whether you're diagnosing a noisy power steering pump, replacing a power steering fluid reservoir hose, or performing preventative maintenance, this genuine Honda O-ring provides an affordable and reliable solution for maintaining your vehicle's hydraulic steering system.

Features

• Genuine Honda OEM Part: Manufactured to Honda's original factory specifications for dependable fitment and sealing performance.

• Updated Red O-Ring Design: Replaces earlier factory O-ring versions used in compatible Honda power steering systems.

• Precision Dimensions: Measures 13.0mm x 1.9mm for applications requiring this specific seal.

• Power Steering Pump Inlet Seal: Designed to seal the connection between the power steering pump and its fluid inlet fitting.

• Helps Eliminate Pump Whine: Can reduce whining and groaning noises caused by air entering through a deteriorated inlet O-ring.

• Prevents Air Intrusion: Helps maintain a secure seal on the suction side of the hydraulic power steering system.

• Reduces Fluid Aeration: Proper sealing helps prevent air bubbles and foaming in the power steering reservoir.

• Hydraulic Fluid Compatibility: Designed for use with the specified Honda power steering fluid.

• Direct OEM Replacement: Installs in place of the original O-ring without modifications on compatible applications.

• Cost-Effective Maintenance: An inexpensive replacement component that may resolve power steering noise without requiring a complete pump replacement.

• Ideal for Preventative Maintenance: Recommended when servicing the power steering pump inlet fitting or replacing related hoses.

Additional Information

Manufacturer: Honda Motor Co., Ltd.

Brand: Genuine Honda OEM

Honda Part Number: 91345-RDA-A01

Product Name: Power Steering Pump Inlet O-Ring

OEM Description: O-Ring (13.0 x 1.9)

Alternative Names: Power Steering Pump Suction O-Ring, Power Steering Inlet Connector Gasket, Power Steering Pump Joint O-Ring

Component Type: Hydraulic Power Steering System Seal

Nominal Dimensions: 13.0mm x 1.9mm

Color: Red

Material: OEM hydraulic-fluid-compatible elastomer; exact compound not specified

Installation Location: Power Steering Pump Inlet / Suction Fitting

Fitment Type: Direct OEM Replacement

Condition: New

Quantity: Sold Individually

Supersedes Previous Honda Part Numbers:

• 91345-PAA-A01

• 91345-PDA-E01

Recommended Fluid: Genuine Honda Power Steering Fluid, part number 08206-9002, or the applicable Honda-specified fluid.

Additional Notes: This O-ring seals the low-pressure inlet connection of the hydraulic power steering pump. It is not intended for the high-pressure outlet fitting or other power steering hose connections that require different seals.

Common Reasons for Replacement

• Power Steering Pump Whine: A worn inlet O-ring can allow air to enter the pump, creating a whining or groaning noise during operation.

• Foaming Power Steering Fluid: Air entering through a deteriorated seal may cause bubbles or foam to develop inside the fluid reservoir.

• Hard or Heavy Steering: Air intrusion can interfere with normal hydraulic operation and contribute to inconsistent steering assistance.

• Aging Rubber Seal: Exposure to engine heat and hydraulic fluid can cause the original O-ring to harden, flatten, or lose elasticity.

• Power Steering Fluid Seepage: A damaged seal may allow fluid leakage around the pump inlet connection.

• Power Steering Pump Replacement: Installing a fresh inlet O-ring is recommended when transferring or reinstalling compatible pump inlet fittings.

• Power Steering Hose Maintenance: Replacing the seal during inlet hose or connector service helps prevent future air leaks.

• Preventative Maintenance: Replacing an aging O-ring can help maintain reliable hydraulic power steering performance.

Installation Notes

1. Verify Compatibility: Confirm that Honda part number 91345-RDA-A01 is correct for your vehicle's power steering pump and inlet fitting.

2. Allow the Engine to Cool: Make sure the engine is off and cool before beginning work around the power steering pump and accessory drive system.

3. Locate the Pump Inlet Connection: Identify the low-pressure fluid inlet fitting where the power steering reservoir supply hose connects to the pump.

4. Prepare for Fluid Leakage: Place absorbent materials beneath the connection to catch any power steering fluid released during disassembly.

5. Remove the Inlet Fitting: Carefully remove the retaining bolt and separate the inlet fitting from the power steering pump according to the factory service procedure.

6. Remove the Original O-Ring: Gently remove the existing seal without scratching or damaging the fitting or pump sealing surfaces.

7. Inspect the Connection: Check the inlet fitting, O-ring groove, and pump housing for contamination, corrosion, cracks, or other damage.

8. Lubricate the New O-Ring: Apply a light coating of clean Honda-approved power steering fluid to the new O-ring before installation.

9. Install the Replacement Seal: Position the O-ring evenly in its designated groove, making sure it is not twisted, stretched, or pinched.

10. Reinstall the Inlet Fitting: Carefully reinstall the connector and tighten its retaining bolt to the factory Honda torque specification.

11. Check the Fluid Level: Inspect the power steering reservoir and refill with the correct Honda-specified power steering fluid as needed.

12. Bleed the Power Steering System: Follow the Honda service procedure to remove trapped air from the hydraulic system. Avoid running the pump with insufficient fluid.

13. Inspect for Leaks and Noise: Start the engine and verify that the inlet connection is properly sealed and that the power steering system operates normally.

Important: If power steering noise continues after replacing the O-ring and properly bleeding the system, inspect the fluid supply hose, reservoir, pump, and other hydraulic connections for additional air leaks or mechanical issues.

What's Included

• (1) Genuine Honda Power Steering Pump Inlet O-Ring – Part Number 91345-RDA-A01

Note: This product includes one individual O-ring. Power steering pumps, inlet fittings, hoses, power steering fluid, and additional installation hardware are sold separately unless otherwise specified.

The Genuine Honda Power Steering Pump Inlet O-Ring (91345-RDA-A01) is a simple but essential replacement component for maintaining proper hydraulic power steering operation on compatible Honda and Acura vehicles. Featuring Honda's updated red O-ring design and precise 13.0mm x 1.9mm dimensions, this factory replacement seal helps prevent air intrusion, reduce fluid aeration, and address common power steering pump whining noises.

Whether you're maintaining a daily-driven Honda Accord, repairing a noisy Honda Element power steering pump, or restoring a classic Honda with hydraulic power steering, this genuine Honda replacement seal offers dependable OEM quality at an affordable cost.