49001-0W005 Power Steering Rack LHD FIT 490010W005 Nissan Pathfinder INFINITI

Product Specification

Product Function Description

The power steering rack assembly is a critical component of your Nissan Pathfinder's steering system. This hydraulic unit converts the rotational movement of the steering wheel into linear motion, turning the front wheels to control the vehicle‘s direction. For the Nissan Pathfinder R50 (1996-2004), a properly functioning steering rack is essential for precise steering response, stable handling, and safe vehicle control. This LHD (Left-Hand Drive) rack-and-pinion assembly is designed to factory specifications, ensuring proper fit and reliable steering performance .

Common Symptoms of a Failing Steering Rack

If you are experiencing any of the following symptoms, your steering rack may be failing and in need of replacement:

• Excessive steering play: The steering wheel feels loose with delayed or vague response – this indicates internal wear in the rack or pinion gear

• Power steering fluid leaks: Visible fluid on the steering rack boots, under the vehicle, or in the engine bay – this suggests worn seals. The R50 Pathfinder uses ATF (Dexron III) as power steering fluid 

• Stiff or heavy steering: Steering feels hard, especially at low speeds – this may indicate internal damage or hydraulic failure

• Clunking or knocking noise: Noise from the steering area when turning or going over bumps – this suggests worn internal components or loose mounting

• Uneven tire wear: Rapid or uneven wear on the front tires – this can be caused by a worn rack affecting alignment

• Poor self-centering: The steering wheel does not return to center after turning – this indicates internal rack wear or binding 

If you have confirmed these symptoms through inspection, replacing the steering rack is the recommended solution.

Product Attributes

Installation Guidelines

Tools typically required:

• Socket wrench set (metric)

• Torque wrench

• Ball joint separator

• Tie rod end separator

• Flare nut wrench (for power steering lines)

• Safety gloves and eye protection

General installation reference (always follow vehicle-specific service manual):

Important:

• The R50 Pathfinder uses a hydraulic power-assisted rack-and-pinion system .

• After installation, flush the system with fresh ATF meeting Dexron III specification .

• A professional wheel alignment is required after installation .

• If you are unsure about any step, consult a qualified mechanic.

Installation Tips & Common Mistakes

The Mistake When Replacing a Power Steering Rack:

❌ Wrong: Failing to use the correct fluid (ATF Dexron III) or not bleeding the system properly.

✅ Correct:

1. Use ATF Dexron III – Nissan specifies ATF (Dexron III) for the power steering on this era Pathfinder, not power steering fluid .

2. Flush the system – If the original failure involved contamination, flush the system thoroughly and consider replacing hoses .

3. Replace tie rods and boots – While the rack is out, replace inner/outer tie rods and boots to avoid double handling .

4. Bleed the system – Bleed by turning the wheel lock-to-lock several times with the engine running, topping up ATF as bubbles purge .

5. Perform a wheel alignment – A full four-wheel alignment is required after rack or tie rod work .

⚠️ Remember: A loose steering u-joint can cause a loss of steering control. Always torque the u-joint bolt to specification. For R50 Pathfinders, inspect the rack mounting bushes; perished bushes cause vagueness and vibration through the wheel .

Industry Knowledge

Nissan Pathfinder R50 Steering System:

The Nissan Pathfinder R50 (1996-2004) uses a hydraulic power-assisted rack-and-pinion steering system, as confirmed by Nissan factory service documentation . This is a different design from the recirculating-ball steering boxes found on older truck-based SUVs.

Key Information:

• Part numbers: 49001-0W005 (LHD)

• Fluid specification: ATF meeting Dexron III 

• Drive types: 2WD and 4WD 

• Engine compatibility: 3.3L V6 (VG33E) 

• Shared platform: Infiniti QX4 (1997-2003) 

Common Failure Modes :

• Seal leakage – The rack seals wear over time, leading to fluid leaks. Red ATF weeping from the rack, lines, or under the boots.

• Internal wear – Rack and pinion teeth can wear, causing steering play and clunks over bumps.

• Tie rod end wear – Inner or outer tie rod ends can wear, affecting steering precision.

• Boot failure – Torn boots allow dirt entry and accelerate rack wear.

Service Tips :

• The correct fluid is ATF (Dexron III)

• Flush fluid every 60,000–100,000 km or 2-3 years

• Replace tie rods and boots when doing the rack

• A proper four-wheel alignment is essential after rack replacement

 Package Contents

• 1 × Power Steering Rack Assembly

• Protective packaging with part number label

Note: Tie rod ends, power steering fluid, and mounting hardware are typically not included. Confirm with your specific seller.

 FAQ

Q1: How can I be sure this steering rack fits my Pathfinder?
A1: Check the existing part number on your current steering rack. This rack fits Nissan Pathfinder R50 (1996-2004) LHD models with the 3.3L V6 engine. Always verify via VIN .

Q2: What is the difference between 49001-0W005 and other related numbers?
A2: 49001-0W005 is the primary LHD part number. Related numbers include 49001-0W000, 49001-4W000, 49001-0W015, 490010W001, which may represent different variants or supersessions .

Q3: What vehicles use this steering rack?
A3: This rack is used on the Nissan Pathfinder R50 (1996-2004) and Infiniti QX4 (1997-2003) .

Q4: Does this come with tie rod ends?
A4: Most suppliers sell the rack without tie rod ends. Confirm with your specific seller. It is recommended to replace inner and outer tie rods at the same time .

After-Sales Service & Warranty

This product is covered by our quality assurance. If you have any questions or issues regarding fitment or quality, please contact us and we will respond within 24 hours.

Related Product Recommendations

When replacing the power steering rack on the Nissan Pathfinder R50, it is often recommended to inspect and consider replacing the following related components at the same time.

Steering Rack Mount Bushings – The rack mounting bushes can perish and cause vagueness and vibration through the wheel. Replace with quality polyurethane or rubber bushings .

Steering Rack Boots – The boots protect the rack from dirt and moisture. If they are torn, they should be replaced to prevent contamination of the new rack .

Inner and Outer Tie Rod Ends – The tie rod ends connect the steering rack to the steering knuckles. If they are worn, steering precision will be affected. Replace as a set when replacing the rack to avoid double handling .

Power Steering Fluid Lines / Hoses – Inspect the high-pressure and return lines for cracks, swelling, or leaks. If the original failure involved contamination, consider replacing the hoses .

Power Steering Pump – The pump supplies hydraulic pressure to the rack. If the pump is failing, steering will be heavy even with a new rack. Inspect for noise and fluid flow.