PHILTOP Power Steering Pump 21-5407 Replacement for Maxima/Altima

In this review the PHILTOP Power Steering Pump 21-5407 is assessed for drivers who need a direct replacement for common Nissan V6 models. The bottom line: it is best for owners of Maxima 2004-2008, Quest 2004-2009, and Altima 2002-2006 who want an OEM-fit replacement that restores steering assist without major modification. The reviewer found the pump matches original equipment references and installs without exotic tools, making it a sensible choice when a worn pump causes leakage, hard steering, or groaning noises.

Key Features

• Fitment: Designed to directly replace OEM numbers 21-5407, 491107Y000 and 491108J200 so it fits the listed Maxima, Quest, and Altima models without custom adapters.
• OEM Compatibility: References OEM codes 215407, 49110CK000 and 49110ZF00A to ensure buyers can match the part to their vehicle's factory spec.
• Material Quality: The pump housing and reservoir use durable materials and finished surfaces intended to resist wear and maintain strength over time.
• Function: Restores power assist to alleviate difficult or unresponsive steering, reduce leaks from old pumps, and address groaning or squealing noises.
• Simple Installation: The pump can be installed with common hand tools, though the reviewer recommends system flushing before fitting to avoid contamination.

Who It's For

This pump is aimed at DIY mechanics and independent repair shops working on Nissan Maxima 2004-2008, Nissan Quest 2004-2009, and Altima 2002-2006 3.5L variants who need an OEM-replacement style power assist pump. It suits owners who prefer a direct-fit part that matches factory reference numbers and can be swapped without specialty equipment.

It is not for vehicles outside the stated fitment list or for users who expect a performance upgrade over factory components. Buyers who cannot perform a system flush or bleed the steering circuit after installation should have a professional complete the job to avoid persistent noise or air in the system.

Pros & Cons

Pros

• Matches OEM reference numbers for accurate fit and replacement compatibility.
• Durable construction with a finished reservoir aimed at long service life.
• Restores steering assist and addresses common failure symptoms like leaks and groaning.
• Installable with basic tools for most home mechanics.

Cons

• Some users reported noise during turning until the system is fully bled and cleaned, so additional bleeding or flushing may be required.
• Fitment is limited to specific Nissan models and years, so it is not universal.

Specifications

Brand	PHILTOP
OEM Fit Numbers	21-5407, 215407, 491107Y000, 491108J200
Additional OEM References	49110CK000, 49110ZF00A
Compatible Models	Maxima 2004-2008; Quest 2004-2009; Altima SE, SE-R 2002-2006
Engine	3.5L V6 where specified
Installation	Direct replacement, basic hand tools recommended; system flush advised

Our Verdict

The PHILTOP 21-5407 power steering pump is a practical, value-oriented replacement for qualifying Nissan Maxima, Quest, and Altima models because it aligns with OEM reference numbers and restores steering assist without modification. It represents good value for owners comfortable flushing and bleeding the steering system during installation, though some may need extra work to eliminate initial noise.

Frequently Asked Questions

Will this pump fit my vehicle?
Check that your vehicle is one of the listed models and years; the pump is intended for the specified Maxima, Quest and Altima variants and matches the OEM reference numbers provided.

Do I need special tools to install it?
No special tools are required for the physical swap, but a full system flush and careful bleeding are recommended to avoid noise and ensure correct operation.

What if I hear noise after installation?
Noise can indicate trapped air, contaminated fluid, or a blocked feed line; re-bleed the system, confirm the oil feed line is secure, and use clean, low viscosity fluid.