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Cardone 21-123 Power Steering Pump
Reliable Power Steering Pump for Mercedes-Benz GL320, ML320, and R320
The Cardone Power Steering Pump 21-123 is a remanufactured hydraulic pump designed specifically for Mercedes-Benz GL320, ML320, and R320 models. Engineered to restore smooth and responsive steering, this pump is a direct replacement that meets OEM specifications.
- Remanufactured power steering pump for Mercedes-Benz GL320, ML320, and R320
- Durable aluminum housing for long-lasting performance
- Press-on pulley attachment type (pulley not included)
- Hose barb inlet and threaded outlet attachment for secure connections
- Includes hydraulic pump, instruction sheet, and sealing kit
- O-ring type hose port for reliable sealing
- Compatible with remote reservoir systems (reservoir not included)
- Power steering outlet thread size: 16x1.5
About the Cardone Power Steering Pump Line
The Cardone Power Steering Pump product line focuses on remanufactured components that restore original steering performance. Each pump undergoes a thorough rebuilding process to ensure proper function and durability. The 21-123 model is part of this line, offering a cost-effective solution for Mercedes-Benz owners needing a reliable replacement without compromising quality.
Product Details and Specifications
This power steering pump features an aluminum housing that provides strength while reducing weight. The inlet uses a hose barb attachment type, and the outlet is threaded with a 16x1.5 size, ensuring compatibility with factory steering systems. The pump includes a press-on pulley attachment, but the pulley itself is not included, so reuse of the original pulley is necessary. Designed for vehicles with remote reservoir setups, this pump does not come with a reservoir or reservoir cap. The package contains the hydraulic pump, a sealing kit, and an instruction sheet to assist with installation.
Common Applications and Problem Solving
- Restores power assist in steering for Mercedes-Benz GL320, ML320, and R320
- Eliminates whining noises caused by worn or failing pumps
- Resolves hard steering issues, especially when turning in one direction
- Addresses fluid flow problems due to debris in the flow control valve bore
- Replaces pumps with damaged or enlarged input shafts affecting pulley fitment
Installation Notes and Tips
When installing the Cardone 21-123 power steering pump, ensure the original pulley is reused as the pulley is not included. Verify that the hose connections match the hose barb inlet and threaded outlet specifications. Use the included sealing kit to prevent leaks and follow the instruction sheet carefully. It is recommended to check and replace power steering fluid as per manufacturer guidelines, even if no issues are apparent, to maintain optimal pump performance.
Quality Assurance and Warranty
This remanufactured power steering pump undergoes rigorous testing to meet performance standards. Cardone provides a warranty on this part, ensuring reliability and peace of mind for Mercedes-Benz GL320, ML320, and R320 owners. Always consult the warranty documentation for specific terms and coverage details.
| Brand | Cardone |
| Part Number | 21-123 |
| Position | Power Steering Pump |
| E-Waste | No |
| FAQs | I bought a replacement power steering pump and my original pulley |
| FAQs | I only have assist when increasing engine rpm after installing th |
| FAQs | Should i ever change my fluid, even though nothing is wrong? |
| FAQs | The end of the original pump's input shaft enlarged causing the p |
| FAQs | The problem is not in the pump, it is in the steering gear. the p |
| FAQs | There may be debris in the flow control valve bore not allowing t |
| FAQs | Why do i still have hard steering in one direction after i replac |
| FAQs | Why is the pump making a whining noise all of the time? |
| FAQs | Yes. some o.e. manufacturers recommend that power steering fluid |
| Hose Port Type | O-ring |
| Housing Material | Aluminum |
| Mounting Hardware Included | No |
| Package Contents | Hydraulic pump; instruction sheet; sealing kit |
| Power Steering Outlet ID Size | 0 |
| Power Steering Outlet Thread Size | 16x1.5 |
| Power Steering Pump Inlet Attachement Type | Hose barb |
| Power Steering Pump Outlet Attachment Type | Threaded |
| Power Steering Pump Outlet Quantity | 1 |
| Power Steering Reservoir Cap Included | No |
| Product Condition | Remanufactured |
| Pulley Attachement Type | Press-on |
| Pulley Included | No |
| Remote Reservoir | Yes |
| Reservoir Included | No |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2008 | Mercedes-Benz | GL320 | N/A | Before 02/19/2008; Reservoir Not Included; In-Line Filter available; For warranty purposes it is recommended to always install a filter and to use suggested OE Fluid and flush the system; Power Steering Pump |
| 2008 | Mercedes-Benz | ML320 | N/A | Reservoir not included, in-line filter, OE fluid & system flush required for warranty.; Power Steering Pump |
| 2008 | Mercedes-Benz | R320 | N/A | Reservoir not included, in-line filter, OE fluid & system flush required for warranty.; Power Steering Pump |
| 2007 | Mercedes-Benz | GL320 | N/A | Reservoir not included, in-line filter, OE fluid & system flush required for warranty.; Power Steering Pump |
| 2007 | Mercedes-Benz | ML320 | N/A | Reservoir not included, in-line filter, OE fluid & system flush required for warranty.; Power Steering Pump |
| 2007 | Mercedes-Benz | R320 | N/A | Reservoir not included, in-line filter, OE fluid & system flush required for warranty.; Power Steering Pump |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.