The Mini Cooper R50 (produced between 2001 and 2006) uses an electric-hydraulic power steering pump, which is a distinctive component in this model. Here’s a detailed description:

Power Steering Pump Overview – Mini Cooper R50 (2001–2006)

Type:

• Electro-Hydraulic Power Steering Pump (EHPS)

Function:

• The pump combines electric and hydraulic technologies.
• It is electrically powered and drives a hydraulic pump that assists with steering.
• It provides variable steering assist depending on the driving conditions.

Location:

• Mounted low on the front subframe, near the passenger-side front wheel.
• It’s somewhat exposed to the elements, making it prone to wear from dirt, moisture, and debris.

Common Issues:

• Pump failure is a well-known issue with R50 models. Symptoms include:
  
• Intermittent or total loss of power steering assist.
• Unusual whining or humming noises.
• Power steering fluid leaks.
• 
  
• Overheating and electrical failure are common due to inadequate cooling or worn fan components.
• The cooling fan attached to or near the pump often fails, compounding pump issues.

Replacement Notes:

• OEM and aftermarket options are available.
• Some replacements include an upgraded fan for better cooling.
• Always ensure proper bleeding of the hydraulic system after replacement.

OEM Part Number:

• 32 41 6 755 389 (varies slightly by production date and market).

Would you like help identifying compatible replacement parts or how to replace or service this pump?