490011CA0A Power Steering Rack For Infiniti QX70 FX35 FX37 V6

Product Function Description

The power steering rack and pinion assembly is a critical component of your Infiniti'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 Infiniti FX35, FX37, FX50, and QX70 (S51 platform) 4WD 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. The part number 49001-1CA0A and 49001-1CA0B are confirmed interchangeable for this application.

DIY Diagnosis Guide

How to Tell If Your Power Steering Rack Needs Replacement:

Look for these common signs:

1. Power steering fluid leaks – Red/brown fluid under the vehicle, weeping from the rack, lines, or inside the boots

2. Heavy steering – Steering feels unusually difficult, especially at low speeds

3. Notchy or uneven steering – Steering feels rough, notchy, or inconsistent when turning

4. Steering play / clunks – Excessive free play in the steering wheel, or clunks over bumps

5. Uneven tire wear – Tire wear patterns indicating steering alignment issues

💡 Quick inspection: Check the power steering fluid level. If it's low, there may be a leak in the rack. With the vehicle off, turn the steering wheel slightly left and right—excessive play may indicate internal rack wear. Also inspect the rack boots for splits or moisture.

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 installation process of a steering rack is complex and must be completed by a qualified mechanic.

• This is a structural and safety-critical component. Proper torque values and installation procedures are essential.

• A professional wheel alignment is required after installation.

• Use the correct power steering fluid as specified in the vehicle manual.

• 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 flush the system or using incorrect fluid, and not performing a wheel alignment.

✅ Correct:

1. Use the correct fluid – Use Nissan/Infiniti-approved PSF or equivalent fluid as specified on the reservoir cap.

2. Flush the system thoroughly – For optimal performance, flush the system when replacing the rack.

3. Inspect and replace tie rods and boots – While the rack is out, inspect and replace if worn.

4. Perform a wheel alignment – Any rack or tie rod work changes toe settings, so a proper alignment is required.

5. Bleed the system properly – Turn lock-to-lock with the engine off first, then with the engine running until bubbles clear.

⚠️ Remember: The installation process of a steering rack is complex and must be completed by a qualified mechanic. A loose steering u-joint can cause a loss of steering control. Always torque the u-joint bolt to specification.

Industry Knowledge

Infiniti FX/QX70 S51 Steering System:

The Infiniti FX (2008-2017) and QX70 (2013-2017) are luxury SUVs built on the S51 chassis. They use a hydraulic power-assisted rack-and-pinion steering system. The 49001-1CA0A steering rack is the LHD version for these vehicles, with the alternative number 49001-1CA0B also available .

Key Information:

• Part numbers: 49001-1CA0A (LHD)

• Drive type: AWD (all-wheel drive) 

• Steering type: Hydraulic power-assisted rack and pinion 

• Production years: 2008-2017 

Common Failure Modes:

• Seal leakage – Red/brown fluid weeping from the rack, lines, or inside 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:

• Use Nissan/Infiniti-approved PSF or equivalent fluid

• Flush fluid every 60,000–100,000 km

• Replace tie rods and boots when doing the rack

• A proper wheel alignment is essential after rack replacement

• The S51 chassis shares steering components across multiple engine variants, so part numbers are often interchangeable 

 Package Contents

• 1 × Power Steering Rack Assembly

• Protective packaging with part number label

Note: Confirm with your specific seller.

FAQ

Q1: How can I be sure this steering rack fits my vehicle?
A1: Check the existing part number on your current steering rack. This rack fits Infiniti FX35, FX37, FX50 (2008-2017) and QX70 (2013-2017) with S51 chassis and LHD configuration . Always verify via VIN.

Q2: Is this for left-hand drive or right-hand drive?
A2: This rack is for left-hand drive (LHD) vehicles only .

Q3: Does this fit 2WD or 4WD models?
A3: This rack is confirmed for 4WD/AWD models .

Q4: What is the difference between 49001-1CA0A and 49001-1CA0B?
A4: Both numbers are cross-references for the same LHD steering rack assembly .

Q5: Does this come with tie rod ends?
A5: Tie rod ends may or may not be included depending on the supplier. Confirm with your specific seller.

After Replacement Still Having Issues?

Replaced the steering rack but still having issues? Check these:

1. Is the power steering system properly bled? – Air in the system can cause noise and heavy steering

2. Is the power steering pump working correctly? – A failing pump can cause heavy steering

3. Are the tie rod ends properly torqued? – Loose tie rod ends can cause steering play

4. Is the steering column u-joint properly connected? – A loose u-joint can cause steering play

5. Has the wheel alignment been performed? – Alignment is mandatory after rack replacement

6. Is the power steering fluid the correct type? – Use Nissan/Infiniti-approved PSF or equivalent

 Quality Assurance & Service Commitment

Quality Assurance:
Every component is manufactured under controlled production processes to ensure consistent dimensional accuracy and material integrity. Each unit undergoes the following quality checks before packaging:

• Dimensional inspection – critical mounting points and rack dimensions are verified against design specifications

• Hydraulic seal test – sealing integrity is confirmed

• Rack movement test – smooth operation is confirmed

• Surface finish inspection – corrosion protection and surface quality are visually verified

Packaging Protection:
Each power steering rack is individually sealed in protective packaging to prevent contamination and physical damage during storage and transit. The packaging includes a clear part number label for easy identification.

Service Commitment:

 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.

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.

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.

Steering Column U-Joint – The u-joint connects the steering column to the rack. Worn u-joints can cause steering play and vibration. Inspect while the rack is removed.