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Power Steering Pipes / Hoses / Radiators

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DISPLAYING 1 to 15 (of 15 products)
Special Order item
99634767
Product Information
Product Information
Bracket for power steering pressure line. For RHD cars

porsche

Fits:
Porsche 986 Boxster 1997-04
Porsche 996 Carrera 1998-05

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99634767
99634767101
99634767201

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Special Order item
98631454501
Product Information
Product Information
Breather hose for the power steering pump reservoir. 

Fits:
Porsche 986 Boxster / S 1997-04

Diagram ref. 2.

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98631454501
98631454500
98631454501

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Special Order item
99951255400
Product Information
Product Information
Hose clamp, 12-22 mm - Various Applications.

porsche

Fits:
Porsche 911 - 1978 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 986 Boxster - 1997 to 2004
Porsche 996 - 1997 to 2005
Porsche 997.1 - 2005 to 2008



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99951255400
99951255400

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00004330574/1
Product Information
Product Information
Hydraulic Fluid for central, power steering and level control systems.
1 Litre

OE Porsche ref numbers: 
000 043 203 33 | 000 043 206 56 | 000 043 305 74


Product Information:
Low compressibility and high corrosion protection
Excellent lubricating properties, high ageing-resistance and adhesion properties
Prevention of deposits and foam formation
Compliance with the requirements of vehicle manufacturers

Vehicle Repairs. We've Got What It Takes.
The febi range of high-quality, specialist hydraulic oils provide optimised low-temperature performance. They are based on advanced additives and selected mineral base oils, and are developed specifically for use in central hydraulic systems such as power steering, convertible roof mechanisms and hydro-pneumatic suspension systems.

Quality by Conviction:
Oils from febi are not universal products, but rather are tailored to the special requirements of vehicle manufacturers. Only the right oil can guarantee the safe functioning of the hydraulic systems in the vehicle. High-quality hydraulic fluids from febi are therefore precisely matched to the special requirements of vehicle manufacturers.


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00004330574
00004320333
00004320656
00004330574

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Special Order item
00004330574
Product Information
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
99923054340
Product Information
Product Information
Power steering line seal set, Pressure line to rack.
Sold each.

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1  Cayman 2006 - 2008
Porsche 996 Carrera 1998 - 2005
Porsche 996 Turbo 2000 - 2005
Porsche 996 GT3 1999 - 2005
Porsche 997.1 Carrera 2005 - 2008
Porsche 997.1 Turbo 2007 - 2009
Porsche 997.2 GT2-RS 2010 - 2013

Diagram ref no 17

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99923054340
99923054340

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Special Order item
99923054240
Product Information
Product Information
Power steering line seal, return line to rack.
Sold each.

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1  Cayman 2006 - 2008
Porsche 996 Carrera 1998 - 2005
Porsche 996 Turbo 2000 - 2005
Porsche 996 GT3 1999 - 2005
Porsche 997.1 Carrera 2005 - 2008
Porsche 997.1 Turbo 2007 - 2009
Porsche 997.2 GT2-RS 2010 - 2013

Diagram ref no 18

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99923054240
99923054240

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Special Order item
99634745112
Product Information
Product Information
Power Steering Pressure Line, LHD.
Restore the high-pressure hydraulic path in your power-steering system with this genuine Porsche pressure line. Designed for Porsche 911 (996 series) and compatible Boxster models, this hose connects the power-steering pump to the steering gear/rack, ensuring optimum assist performance, secure fluid containment and long-term reliability.
For Left Hand Drive Cars ONLY!

Fits:
  • Porsche Boxster 986 2.7L 2003-04
  • Porsche Boxster 986 2.7L 2003-04
  • Porsche 996 C2 3.6L 2002-2005
  • Porsche 996 GT2 2003-05
  • Porsche 996 GT3 MKI 1999-02
  • Porsche 996 GT3 MKII 2003>>

Diagram Ref No 1

What This Product Does:

  • The pressure line carries high-pressure hydraulic fluid from the power-steering pump to the steering gear or rack. This enables the system to provide assist to the driver’s steering input.
  • Correct hose integrity ensures fluid stays contained under pressure, the steering assist remains consistent, and no performance loss or fluid loss occurs.
  • A failure here can impact steering feel, safety, and can lead to fluid loss or damage.

Symptoms & Signs You Might Need Replacement:
  • Visible fluid leak: oil or power-steering fluid puddle or wet spot beneath the car, near the steering gear or hose.
  • Hard steering or increased effort: If the hose is leaking or collapsed internally, the assist will suffer and you may find the wheel harder to turn.
  • Whining or groaning noise when turning the steering wheel — indicates stress on the pump due to fluid loss or internal hose restriction.
  • Hose condition: cracks, abrasions, bulges, fitting damage, especially in older vehicles or where routing is near heat/exhaust components.
  • During service: If you’re replacing power-steering components (pump, rack, hoses) and the hose is original or aged, replacing the pressure line is wise.

Why Replacement Matters:
  • Steering safety & performance: A pressure line failure can cause sudden loss of assist or fluid loss — replacing before major failure is proactive.
  • Prevents collateral damage: A leaking hose may cause fluid contamination of other components, damage the pump, or even cause burnt rubber in the bay.



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99634745112
99634745112
99634745109
99634745110

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Special Order item
98634744319
Product Information
Product Information
Power steering pressure line.

porsche

Fits:
Porsche 986 Boxster 2003>>

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

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98634744319
98634744319
98634744315
98634744317

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Special Order item
99634744911
Product Information
Product Information
Power Steering Return Line, LHD.
The Genuine Porsche Power Steering Return Line 99634744911 is a replacement hydraulic line for the power-assisted steering system on compatible left-hand-drive (LHD) Porsche vehicles.

Fits:
  • Porsche Boxster 986 2.7L 2002
  • Porsche Boxster S 986 3.2L 2002
  • Porsche Boxster 986 2.7L 2003-04
  • Porsche Boxster S 986 3.2L 2003-04
  • Porsche 996 C2 3.6L 02-2005
  • Porsche 996 C4 3.6L 09/01-2005
  • Porsche 996 C4S 3.6L 02-2005
  • Porsche 996 GT2 2002-05
  • Porsche 996 GT3 MKI 2002
  • Porsche 996 GT3 MKII 2003>>  

Diagram Ref No 2

The return line carries power steering fluid back through the hydraulic system after it has assisted steering operation. Maintaining a sealed and unrestricted return path is essential for correct fluid circulation, consistent steering assistance and protection of the power steering pump and associated components.

As a Genuine Porsche component, this line is manufactured for the intended factory installation and is suitable for replacing an original return line that has become cracked, leaking, corroded or otherwise damaged.

What This Product Does:
A hydraulic power steering system uses pressurised fluid to reduce the amount of effort required to turn the steering wheel.

The power steering pump circulates hydraulic fluid through the system. After the fluid has performed its steering-assistance function, it must return through the system so that it can be recirculated.

The power steering return line provides this return path.

Its functions include:

  • Returning hydraulic fluid through the power steering system
  • Maintaining continuous power steering fluid circulation
  • Helping maintain correct hydraulic system operation
  • Preventing fluid from escaping from the system
  • Supporting consistent steering assistance
  • Helping protect the power steering pump from low-fluid operation

Although the return side generally operates at lower pressure than the main pressure supply line, it must still remain properly sealed and free from restrictions.

Symptoms Of Wear Or Failure:
Power steering lines are exposed to heat, vibration, hydraulic fluid, road contamination and ageing.

Over time, deterioration can result in leaks or restricted fluid flow.

Common symptoms include:

  • Power steering fluid underneath the vehicle
  • Visible fluid around the return line
  • Damp or oily hose connections
  • Falling power steering fluid level
  • Frequent need to top up the reservoir
  • Heavier steering effortIntermittent power steering assistance
  • Whining or groaning from the power steering pump
  • Foaming or aeration in the fluid reservoir
  • Burning smell if fluid reaches hot components
  • Visible cracking or deterioration of flexible hose sections
  • Corrosion on metal sections or fittings
  • Damaged or loose connections

Any unexplained loss of power steering fluid should be investigated promptly.

Why Replacement Matters:
The return line is essential for maintaining a sealed and correctly circulating hydraulic power steering system.

Replacing a damaged or leaking line helps:

  • Stop power steering fluid loss
  • Restore correct hydraulic fluid circulation
  • Maintain consistent steering assistance
  • Reduce the risk of air entering the system
  • Protect the power steering pump
  • Prevent fluid contamination of surrounding components
  • Restore the reliability of the steering system

Because steering is a safety-critical vehicle system, known hydraulic leaks or damaged lines should be repaired promptly.



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

99634744911
99634744911
99634744909
99634744910

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99634701111P
Product Information
Product Information
Replacement Pipes (Steel) For LHD Steering Rack (Pair)
For Left Hand Drive Cars ONLY! 

Fits:
Porsche Boxster 986 2.5L 1997-99 
Porsche Boxster 986 2.7L 1999-02
Porsche Boxster S 986 3.2L 1999-02 
Porsche Boxster 986 2.7L 2003-04 
Porsche Boxster S 986 3.2L 2003-04
Porsche 996 C2 3.4L 1997-08/01
Porsche 996 C4 3.4L 1997-08/01
Porsche 996 C2 3.6L 09/01-2005 
Porsche 996 C4 3.6L 09/01-2005 
Porsche 996 C4S 3.6L 09/01-2005 
Porsche 996 TURBO 2000-05

Other than buying a completely new steering rack or having your existing steering rack refurbished, which are both very expensive options, we now offer replacement steering rack pipes which are normally not available separately, the two replacement pipes fit to the steering rack, these pipes normally deteriorate. The steering rack of a power-assisted car needs a hydraulic circuit: a pressure line (high pressure) from the power steering pump (or pump + reservoir assembly) to the steering rack, and a return line (low pressure) from the rack back to the reservoir (or pump return side). 


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

99634701111P
99634701107
99634701104
99634701106
99634701110
99634701111

The product you are viewing cross references to these numbers
99634701210P
Product Information
Product Information
Replacement Pipes (Steel) For RHD Steering Rack (Pair)
For Right Hand Drive Cars ONLY!  

Other than buying a completely new steering rack or having your existing steering rack refurbished, which are both very expensive options, we now offer replacement steering rack pipes which are normally not available separately, the two replacement pipes fit to the steering rack, these pipes normally deteriorate. The steering rack of a power-assisted car needs a hydraulic circuit: a pressure line (high pressure) from the power steering pump (or pump + reservoir assembly) to the steering rack, and a return line (low pressure) from the rack back to the reservoir (or pump return side). 


Fits:

  • Porsche Boxster 986 2.5L 1997-99
  • Porsche Boxster 986 2.7L 1999-02
  • Porsche Boxster S 986 3.2L 1999-02
  • Porsche Boxster 986 2.7L 2003-04
  • Porsche Boxster S 986 3.2L 2003-04
  • Porsche 996 C2 3.4L 1997-08/01
  • Porsche 996 C4 3.4L 1997-08/01
  • Porsche 996 C2 3.6L 09/01-2005
  • Porsche 996 C4 3.6L 09/01-2005
  • Porsche 996 C4S 3.6L 09/01-2005
  • Porsche 996 TURBO 2000-05  



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99634701210P
99634701208
99634701205
996347012087
99634701210

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Special Order item
99635554300
Product Information
Product Information
Support bracket for solid brake, clutch and power steering lines. 

porsche

Fits:
Porsche 986 Boxster - 1997 to 2004
Porsche 987.1 Boxster - 2005 to 2008
Porsche 987.1 Cayman - 2005 to 2008
Porsche 996 - 1997 to 2005
Porsche 997.1 - 2005 to 2008


Diagram ref no 17



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99635554300
99635554300

The product you are viewing cross references to these numbers
Special Order item
99923055110
Product Information
Product Information
Threaded joint for power steering pipes, NW10

porsche

Fits:
Porsche 996 Carrera 2000-05
F             >> 99-4S630 356
F             >> 99-4S603 928
F             >> 99-4S642 725

Porsche 996 Turbo 2001-05
F             >> 99-4S680 654
F             >> 99-4S670 658
F             >> 99-4S695 107

Porsche 996 GT3 1999-05
F             >> 99-4S691 629

Porsche 997.1 Carrera 2005-08
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2006-08

Click 'Zoom in' for large parts diagram.
Diagram ref no 16

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

99923055110
99923054010
99923055110

The product you are viewing cross references to these numbers
Special Order item
99923055210
Product Information
Product Information
Threaded joint for power steering pipes, NW6

porsche

Fits:
Porsche 996 Carrera 2000-05
F             >> 99-4S630 356
F             >> 99-4S603 928
F             >> 99-4S642 725

Porsche 996 Turbo 2001-05
F             >> 99-4S680 654
F             >> 99-4S670 658
F             >> 99-4S695 107

Porsche 996 GT3 1999-05
F             >> 99-4S691 629

Porsche 997.1 Carrera 2005-08
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2006-08

Click 'Zoom in' for large parts diagram.
Diagram ref no 15

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99923055210
99923055210
99923053910

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DISPLAYING 1 to 15 (of 15 products)
Also found on these pages
About Power Steering Pipes / Hoses / Radiators

Porsche Power Steering Pipes, Hoses & Radiators | Design911 Hydraulic Components for Precision Steering

Power steering pipes, hoses, and radiators are vital for maintaining smooth, responsive steering performance in your Porsche. These components transport and cool the hydraulic fluid that powers the steering system, ensuring precise control, minimal resistance, and consistent handling under all driving conditions. A well-maintained hydraulic circuit not only enhances steering feel but also protects your steering pump, rack, and associated components from wear and overheating.

At Design911, we offer an extensive selection of power steering pipes, hoses, and cooling radiators, engineered for exact fitment, reliability, and high-pressure performance. Manufactured using durable materials such as reinforced rubber, stainless steel, and aluminium, our range is ideal for servicing, restoration, and performance upgrades — keeping your Porsche’s steering system operating at its sharpest.

What Do Power Steering Pipes, Hoses & Radiators Do?

Power steering pipes and hoses transfer hydraulic fluid between the pump, rack, and reservoir, while radiators (or coolers) regulate fluid temperature for consistent performance.

Core Functions:
• Deliver hydraulic fluid to assist steering input.
• Maintain consistent pressure within the steering circuit.
• Prevent overheating of steering fluid during high-load use.
• Ensure responsive, effortless steering at all speeds.
• Reduce wear on the pump, seals, and steering rack.

Together, these parts form the backbone of your Porsche’s power steering system, ensuring smooth handling and precise feedback whether on the road or track.

Why Do Power Steering Components Fail or Degrade?

Continuous heat, pressure, and exposure to fluids can cause deterioration of hoses and pipes over time, while radiators may corrode or leak.

Common Causes of Failure Include:
• Cracked or brittle hoses from age or heat exposure.
• Corrosion or pitting in metal pipes.
• Leaks at joints or seals from fluid pressure fluctuations.
• Blocked or damaged steering coolers reducing efficiency.
• Contamination of hydraulic fluid causing internal wear.

When these components fail, drivers may experience stiff steering, fluid leaks, noise, or overheating — all of which can lead to expensive steering system damage if left unaddressed.

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

Replacing or upgrading these components restores safe, consistent hydraulic operation and improves overall steering precision. High-quality materials and modern design offer improved durability, pressure resistance, and corrosion protection.

Key Benefits:
• Restores smooth, consistent steering response.
• Prevents fluid leaks and overheating.
• Extends life of steering pumps and racks.
• Constructed from premium, heat- and pressure-resistant materials.
• Fits Porsche 911, 944, 968, Boxster, Cayman, Cayenne, and Macan models.
• Ideal for restorations, repairs, or performance upgrades.

Design911’s Porsche power steering pipes, hoses, and radiators provide durability, precision, and reliability — ensuring confident handling and performance on every drive.

Highlights

• Premium Porsche power steering hoses, pipes, and cooling radiators.
• Engineered for precision fitment and leak-free performance.
• Reinforced construction for high-pressure durability.
• Corrosion-resistant and temperature-stable materials.
• Suitable for both classic and modern Porsche models.
• Perfect for maintenance, restoration, or upgrades.

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