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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design91.uk/images/schemaLogo.png https://www.design91.uk/images/schemaLogo.png +443456003478 https://www.design91.uk Facebook Instagram

Power Steering Pumps

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DISPLAYING 1 to 7 (of 7 products)
Special Order item
98731422500
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Product Information
Power steering expansion tank.

porsche

Fits:
Porsche 987C Cayman 2006-08
Porsche 987 Boxster RS 60 Spyder I754

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Diagram ref no 1.

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98731422500
98631422501
98631422502

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00004330574
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Product Information
Power steering fluid.  1 Litre

Pentosin Hydraulic System Fluid

porsche

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00004330574
00004320656
00004330574

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Special Order item
99731422001
Product Information
Product Information
Power Steering Pump Oil Container.

porsche

Fits:
Porsche 986 Boxster 1997-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 Carrera 1998-05
Porsche 997 Carrera MKI 2005-08

This product supersedes Porsche's old part numbers:
- 99631422002
- 99631422003

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Diagram ref no 8.

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99731422001
99731422000
99631422003
99631422002

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99731422001/1
Product Information
Product Information
Power Steering Pump Oil Container.

Fits:
Porsche 986 Boxster 1997-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 Carrera 1998-05
Porsche 997 Carrera MKI 2005-08

This product supersedes Porsche's old part numbers:
- 99631422002
- 99631422003

Click 'zoom in' for large parts diagram.
Diagram ref no 8.

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Related, superseded, cross reference or alternative numbers for comparison.

99731422001
99731422000
99631422003
99631422002
99731422001

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Special Order item
99631405003
Product Information
Product Information
Power steering pump.

porsche

Fits:
  * M657 - for cars with power assisted steering
Porsche 986 Boxster 1997-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 Carrera 1998-05
Porsche 997 Carrera 2005-08

This part number has been superseded from previous numbers:
- 99631405002,

Click 'Zoom in' for large parts diagram.
Diagram ref no 9

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99631405003
99631405002
99631405003

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Special Offer
99631405003/2
Product Information
Product Information
Power steering pump. 

oematch

Fits:
  * M657 - for cars with power assisted steering
Porsche 986 Boxster 1997-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 Carrera 1998-05
Porsche 997 Carrera 2005-08

This part number has been superseded from previous numbers:
- 99631405002,

Click 'Zoom in' for large parts diagram.
Diagram ref no 9


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99631405003
411091500322
99631405002
99631405003
54280
996.314.020.04
996.314.020.05
996.314.050.02
996.314.050.03
997.314.020.00
99631402004
99631402005
99731402000

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996314050X
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Product Information
exchange
Reconditioned Power Steering Pump. 99631405002

Please note:
Reconditioned units are sold on an exchange basis, A surcharge of £161.03 will be held and then refunded when the old one is returned.

porsche

Fits:
Porsche 986 Boxster 1998-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 Carrera 1998-05
Porsche 997 Carrera 2005-08


Please note: This product is sold on an exchange the deposit we will refund after you have returned your old part.


    PLEASE NOTE:
  • The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer.
  • Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer.
  • Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning.
  • All surcharges and exchanges are subject to our terms and conditions.




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996314050X
996314050X
99631405002

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DISPLAYING 1 to 7 (of 7 products)
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About Power Steering Pumps

Porsche Power Steering Pumps, Hoses & Radiators | Design911 Hydraulic Components for Smooth & Precise Handling

Power steering pumps, hoses, and radiators are the key components that ensure your Porsche’s steering system operates smoothly, quietly, and efficiently. The power steering pump pressurises hydraulic fluid, while hoses transport it throughout the system, and radiators (or coolers) regulate temperature to prevent overheating. Together, these components provide effortless steering control, precise feedback, and the responsive handling that defines Porsche driving performance.

At Design911, we offer a comprehensive range of power steering pumps, hoses, and radiators engineered for precision fitment, durability, and high-pressure operation. Manufactured using premium materials, each component is designed to perform under demanding conditions — whether for daily driving, performance tuning, or restoration projects. Our range helps maintain steering precision, extend component life, and deliver long-term reliability.

⚙️ What Do Power Steering Pumps, Hoses & Radiators Do?

These interconnected components form the core of your Porsche’s hydraulic steering system, providing consistent power assist and cooling for maximum control.

Core Functions:
• The pump generates hydraulic pressure to assist steering input.
• Hoses and pipes transport pressurised fluid throughout the system.
• The radiator (cooler) regulates temperature for consistent operation.
• Maintain smooth, controlled steering effort at all speeds.
• Protect the steering rack and pump from overheating and wear.

This system ensures that steering remains light yet responsive — essential for both precision handling and driver comfort.

Why Do Power Steering Components Fail or Degrade?

Due to constant exposure to heat, pressure, and fluid flow, these components are subject to gradual wear and degradation over time.

Common Causes of Failure Include:
• Leaks from aged seals, fittings, or cracked hoses.
• Contaminated or deteriorated steering fluid reducing lubrication.
• Pump bearing or vane wear from low or dirty fluid.
• Corrosion or pitting in metal pipes and radiators.
• Blocked cooling circuits leading to overheating.

Failure in any of these parts can cause noise, fluid leaks, stiff steering, or even total system failure — making timely replacement critical for safety and reliability.

Why Replace or Upgrade Your Porsche Power Steering Pumps, Hoses & Radiators?

Replacing worn or damaged power steering components restores hydraulic pressure, cooling efficiency, and overall steering feel. Upgrading to improved materials enhances longevity and performance, particularly for high-demand or motorsport applications.

Key Benefits:
• Restores smooth, responsive steering performance.
• Eliminates leaks, whine, or vibration from failing components.
• Extends the life of steering racks and seals.
• Constructed from corrosion- and heat-resistant materials.
• Available for Porsche 911, 944, 968, Boxster, Cayman, Panamera, Cayenne, and Macan models.
• Ideal for maintenance, restorations, or high-performance upgrades.

Design911’s Porsche power steering pumps, hoses, and radiators combine engineering precision, reliability, and superior materials — ensuring your Porsche’s steering stays sharp, responsive, and fluid.

Highlights

• Premium Porsche power steering pumps, hoses, and radiators.
• Engineered for precision fitment and reliable performance.
• High-pressure and temperature-resistant materials.
• Reduces steering effort and enhances handling comfort.
• Suitable for both classic and modern Porsche models.
• Perfect for servicing, restoration, or performance tuning.

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