Kärcher K2–K3 Pump Assembly – OEM Replacement Part 4.551-159.3

Keep your Kärcher K2 or K3 pressure washer running at peak performance with this genuine-spec pump assembly replacement. Engineered to match original factory tolerances, this direct-fit component restores full water pressure and flow to your machine — getting you back to tackling driveways, patios, vehicles, and outdoor surfaces quickly and efficiently.

Why Choose This Pump Assembly?

Exact OEM Fit: Designed specifically for Kärcher K2 and K3 series pressure washers, referencing part number 4.551-159.3 for a hassle-free, no-modification install.
Restores Full Performance: Replaces a worn or damaged pump to bring your pressure washer back to factory-spec water pressure and spray performance.
Durable Construction: Built with quality materials to withstand the demanding operating conditions of a high-pressure washer environment.
Fast Shipping: Ships promptly so you're not waiting around to get your outdoor cleaning equipment back in action.
Great Value: A cost-effective alternative to purchasing a brand-new pressure washer — extend the life of your existing unit for a fraction of the cost.

Compatibility

Kärcher K2 Series Pressure Washers
Kärcher K3 Series Pressure Washers
Part Number: 4.551-159.3

Please verify your model number before ordering to ensure compatibility. Refer to your Kärcher owner's manual or product label for your specific model details.

What's in the Box?

1 × Pump Assembly (Part No. 4.551-159.3)

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Frequently Asked Questions

Q: Which Kärcher pressure washer models is this pump assembly compatible with?

A: This pump assembly (part number 4.551-159.3) is designed for use with Kärcher K2 and K3 series pressure washers. Always cross-reference your specific model number against this part number before purchasing to confirm fitment.

Q: Is this a direct drop-in replacement or does it require modification?

A: This pump assembly is designed as a direct-fit replacement for compatible K2 and K3 Kärcher models, requiring no modifications. Standard mechanical aptitude and basic tools are typically all you need for installation.

Q: How do I know if my pressure washer pump needs replacing?

A: Common signs that a pump assembly needs replacement include a significant drop in water pressure, the machine running but producing little to no spray output, visible leaks around the pump housing, or unusual noise during operation. If your K2 or K3 is exhibiting these symptoms, a new pump assembly can restore full functionality.

Q: How quickly will my order ship?

A: This item is marked for fast shipping. Orders are processed and dispatched promptly so you can get your pressure washer back up and running as soon as possible.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.