Power Steering Pump for Lexus LS430 2001-2006 - Reliable Replacement

In this review the focus is on a direct-fit power steering pump intended for Lexus LS430 models from 2001 to 2006. The bottom line: this replacement pump delivers the core function most owners need - restoring smooth hydraulic assist to heavy or sticky steering - and it does so with parts that match the original fitment. For drivers experiencing increased noise, heavy steering, or inaccurate turning, this pump is a practical, cost-conscious repair option backed by a three-year warranty and a brand with over a decade of parts experience.

Key Features

• Vehicle fitment: Fits Lexus LS430 2001-2006 V8 4.3L, providing a direct replacement for the factory unit to simplify installation when the match is correct.
• Reference numbers: Supplied to replace part numbers 21-5351, 215351, and 4431050070, making it straightforward to confirm compatibility with existing maintenance records.
• Primary function: Acts as a power assist pump by directing fluid from the reservoir into the steering gear so the wheel receives the correct pressure for smooth turning assistance.
• Replacement reminder: Intended for owners who notice increased noise, heavy or stuck steering, or inaccurate directional response, offering a clear fix for hydraulic steering symptoms.
• Manufacturer support: From a supplier with about 15 years in parts production and a three-year warranty, which adds confidence for a long-term service replacement.

Who It's For

This pump is best for Lexus LS430 owners and independent mechanics who need a direct-fit, OEM-style replacement to restore hydraulic power steering function on 2001 through 2006 V8 4.3L models. It is aimed at those who prefer parts that match original mounting and reference numbers and want a backed warranty for peace of mind.

It is less suitable for someone who needs a plug-and-play, noise-free upgrade; some customers report elevated noise levels compared with quieter factory units. Buyers who want a fully remanufactured core with noise-optimized internals may want to compare options before purchasing.

Pros & Cons

Pros

• Direct-fit for Lexus LS430 2001-2006, which simplifies part matching and installation planning.
• Matches reference numbers 21-5351, 215351, and 4431050070 to help confirm compatibility with OEM service guides.
• Backed by a three-year warranty and a manufacturer with long-term experience in automotive parts production.
• Good value for money according to customer feedback, offering functional restoration at a reasonable cost.

Cons

• Some customers report noticeable noise from the pump after installation, so it may not be as quiet as the original unit.
• Installation can be mixed in difficulty; not all buyers found the process straightforward without mechanical experience.

Specifications

Brand	KAX
Vehicle fitment	Lexus LS430 2001-2006 V8 4.3L
Reference numbers	21-5351, 215351, 4431050070
Function	Power assist pump directing fluid to steering gear
Warranty	3 years
Manufacturer experience	About 15 years in automotive parts production

Our Verdict

For owners of a Lexus LS430 2001-2006 who need to restore hydraulic steering assist, this pump is a practical and cost-effective replacement that matches original reference numbers and comes with a three-year warranty. It represents good value for functionality and fit, though buyers should be aware of potential noise and plan installation with proper tools or professional help if needed.

Frequently Asked Questions

Will this pump fit my LS430?
It is specified to fit Lexus LS430 models from 2001 through 2006 with the V8 4.3L engine and replaces part numbers 21-5351, 215351, and 4431050070.

What symptoms indicate I need this pump?
Replace the pump if steering becomes heavy or stuck, turning feels inaccurate, or the system produces increased noise indicating failing hydraulic assist.

Is the pump quiet after installation?
Some users report higher noise levels than the original unit, so while function is restored, the pump may be louder in certain installations.