Product Description
The CARDONE 21-157 Remanufactured Power Steering Pump is engineered to deliver factory-grade steering assist with enhanced durability. Every unit is fully disassembled, thoroughly cleaned, and precision-tested to restore optimal performance. Engineers evaluate original OE designs to identify weaknesses and implement improvements where beneficial, ensuring this remanufactured pump often exceeds the reliability of the factory version.
Critical components such as cam packs and spool valves undergo triple-testing to guarantee consistent hydraulic output. Premium-grade HNBR seals and all-new O-rings protect against high-temperature breakdown and fluid deterioration, reducing the likelihood of leaks. Shafts are resurfaced to precise tolerances to prevent premature wear and promote smooth, quiet operation. Each pump is hydraulically tested to confirm correct pressure, flow, steering effort, and noise levels.
CARDONE’s eco-friendly remanufacturing process reduces raw material and energy consumption by as much as 80%, delivering high-performance steering restoration while minimizing environmental impact.
Key Features
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Triple-tested internals ensure consistent reliability and OE-level steering performance.
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High-temp HNBR seals resist heat and fluid degradation for long-lasting leak prevention.
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Precision-machined shafts reduce friction and extend the life of the pump.
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Fully calibrated relief valves provide accurate hydraulic assist across driving conditions.
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Hydraulic testing confirms pressure output, flow rate, bypass function, and low noise operation.
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Lightweight aluminum housing delivers strength while reducing overall vehicle weight.
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Environmentally responsible remanufacturing conserves up to 80% raw materials.
Technical Specifications
| Spec |
Detail |
| Filter Included |
No |
| Hose Port Type |
O-Ring |
| Housing Material |
Aluminum |
| Inlet Attachment Type |
Quick Connect |
| Inlet Diameter |
0.626 IN (15.9004 MM) |
| Inlet Quantity |
1 |
| Mounting Hardware Included |
No |
| Outlet Attachment Type |
Threaded |
| Outlet Quantity |
1 |
| Outlet Thread Size |
16x1.5 |
| Pulley Attachment Type |
Press-On |
| Pulley Belt Type |
Serpentine |
| Pulley Included |
No |
| Remote Reservoir |
No |
| Reservoir Included |
No |
| Reservoir Cap Included |
No |
| Shaft Type |
Press-On |
| Type |
Hydraulic |
OE Cross References
Mercedes-Benz:
0044667601, 0044668501, 0044668601, 0044669101
Vehicle Compatibility
| Year |
Make |
Model |
Engine |
Notes |
| 2007 |
Mercedes-Benz |
E550 |
5.5L |
Reservoir Not Included; Install Filter & Use OE Fluid; System Flush Required |
| 2006 |
Mercedes-Benz |
ML350 |
3.5L |
Before 12/20/2005; Reservoir Not Included; Install Filter & Use OE Fluid |
| 2006–2007 |
Mercedes-Benz |
ML500 |
5.0L |
Reservoir Not Included; Install Filter & Use OE Fluid |
| 2006–2007 |
Mercedes-Benz |
R500 |
5.0L |
Reservoir Not Included; Install Filter & Use OE Fluid |
Installation & Warranty Notes
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Flush the power steering system thoroughly before installation.
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Only use Mercedes-approved power steering fluid to prevent noise, foaming, or failure.
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Install an in-line steering filter to maximize pump life and adhere to warranty requirements.
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Inspect hoses, seals, brackets, and fittings before installation.
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Ensure proper pulley installation using the correct press-on tool.
