49001-7X000 Power Steering Rack Gear for 490017x000 Nissan Infiniti QX56

Product Function Description

The power steering rack assembly is a critical component of your Nissan or Infiniti vehicle's steering system. This hydraulic rack-and-pinion unit converts the rotational movement of the steering wheel into linear motion, turning the front wheels to control the vehicle‘s direction. For Nissan Pathfinder, Infiniti QX56, Armada, and compatible models, a properly functioning steering rack is essential for precise steering response, stable handling, and safe vehicle control. This LHD (Left-Hand Drive) 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

• 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

• Vehicle pulling or wandering: The vehicle drifts to one side or wanders at highway speeds

• Notchy steering feel: Resistance or binding when turning the wheel – this indicates internal wear or damage

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

How to Diagnose a Faulty Steering Rack

Before purchasing a replacement, perform these simple checks to confirm the steering rack is the issue:

• Visual Inspection: Check the steering rack boots for tears or fluid leaks. Inspect the power steering fluid level and condition – low or dirty fluid indicates system issues.

• Play Test: With the vehicle on the ground and engine off, gently turn the steering wheel left and right – excessive play before the wheels move indicates rack wear.

• Leak Test: Inspect the rack boots – if they are swollen or dripping with fluid, internal seals have failed.

• Road Test: During a test drive, note any pulling, clunking, or wandering steering.

• Tie Rod Inspection: Check the inner and outer tie rod ends for play.

 Product Attributes

Why Choose This Steering Rack?

Restores Steering Precision – A worn rack creates play and vague steering feel. This new rack restores direct, precise steering control for confident driving.

Eliminates Power Steering Leaks – Worn seals cause fluid leaks that can damage other components and reduce steering assistance. This new rack comes with fresh seals for leak-free operation.

Prevents Uneven Tire Wear – A worn rack affects wheel alignment, causing rapid and uneven tire wear. Replacing it helps protect your tire investment.

Direct Replacement – Precision-engineered to match the original rack specifications. Direct bolt-on replacement – no modifications required.

Proven Compatibility – This rack is confirmed compatible with Nissan Pathfinder, Infiniti QX56, and Armada LHD models. Cross-reference numbers include 49001-ZH50A and DKM 58.24.01 / C331.

Essential for Steering System Service – When steering components are worn, replacing the steering rack ensures complete and reliable steering system function. Power steering fluid must be filled and the system bled of air after installation.

Package Contents

1 x Steering Rack Assembly. Note:Please confirm compatibility with your vehicle model and year before purchasing.

DIY or Professional Installation?

This replacement is suitable for DIY if:

• You have advanced mechanical skills and the required tools (socket set, torque wrench, ball joint separator).

• You are comfortable working under the vehicle with steering and suspension components.

• The job takes approximately 4-6 hours.

We recommend professional installation if:

• You do not have the proper tools for steering rack removal and alignment.

• You are not comfortable with steering system repairs.

• You are not confident in your mechanical skills.

Note: Improper installation can lead to steering failure, safety issues, and warranty concerns. The installation process for a steering rack is complex and must be completed by a qualified mechanic. After installation, a professional wheel alignment is MANDATORY to ensure proper handling and prevent uneven tire wear. If the vehicle is equipped with VDC/ESP, a steering angle sensor reset may be required after installation.

Common Misconceptions About Steering Racks

Myth 1: “If it‘s not leaking fluid, the rack is fine.”
Fact: Steering racks can fail internally without any external leakage. Play, stiffness, or clunking can occur even without visible fluid loss.

Myth 2: “A wheel alignment will fix uneven tire wear caused by a worn rack.”
Fact: A worn rack with play cannot be aligned properly. Replacing the rack is required before alignment will be effective.

Myth 3: “All Nissan steering racks with similar part numbers are interchangeable.”
Fact: Steering racks must match the vehicle’s specific chassis, drive type (LHD/RHD), and steering configuration. This rack is specifically for Nissan Pathfinder, Infiniti QX56, and Armada LHD applications. Confirm your vehicle‘s specifications before ordering.

Common Customer Concerns & Our Solutions

We understand that purchasing a steering rack can raise questions and concerns. Here is how we address the most common issues our customers face:

“How do I know if this rack fits my vehicle?” – This rack fits Nissan Pathfinder, Infiniti QX56, and Nissan Armada LHD models. Please confirm your vehicle‘s model year and drive type before ordering. 

“Does this rack include tie rod ends?” – Inner tie rod ends may or may not be included depending on the supplier. Please confirm the package contents before purchasing.

“What if I do not get a wheel alignment after rack replacement?” – A wheel alignment is MANDATORY after rack replacement. Without it, the vehicle will pull, steering will be off-center, and the front tires will wear out quickly and unevenly.

“What if the part arrives damaged or doesn‘t meet quality expectations?” – Every shipment is inspected before dispatch. If a part ever arrives defective, we’ll arrange a replacement immediately.

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, it is often recommended to inspect and consider replacing the following related components at the same time.

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.

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.

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.

Inner Tie Rod Ends – The inner tie rod ends are attached directly to the rack. They can wear and cause steering play. While the rack is out, inspect and replace if needed. Some suppliers include these with the rack .