Please wait… 
Please wait while we process your order,
do not press the back button… 
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://design91.uk/images/schemaLogo.png https://design91.uk/images/schemaLogo.png +443456003478 https://design91.uk Facebook Instagram

Power Steering Pumps

DISPLAYING 1 to 1 (of 1 products)
Special Offer
99970113550/1
Product Information
Product Information
O-ring R15x2,5 - Used in various positions
Sold each

Fits:

Porsche 914 - 1970 to 1976
Porsche 911 - 1965 to 1989
Porsche 993 - 1994 to 1998


Used on Sportomatic oil pump for 911 and 914
Used on Power Steering pump for 993


Diagram ref no 8 and 16 



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Related, superseded, cross reference or alternative numbers for comparison.

99970113550
99970113550

The product you are viewing cross references to these numbers
DISPLAYING 1 to 1 (of 1 products)
Also found on these pages
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.

You may also like
Popular Models