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Power Steering Pipes / Hoses / Radiators

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DISPLAYING 1 to 16 (of 19 products)
1 2
Special Order item
98634773903
Product Information
Product Information
Bracket for Power steering pressure line.



Fits:
Porsche 986 Boxster >>2002

Click 'Zoom in' for large parts diagram.
Diagram ref no 13

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98634773903
98634773903

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Special Order item
98634774902
Product Information
Product Information
Bracket for Power steering pressure line.



Fits:
Porsche 986 Boxster >>2002

Click 'Zoom in' for large parts diagram.
Diagram ref no 14

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98634774902
98634774902

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Special Order item
99634767
Product Information
Product Information
Bracket for power steering pressure line. For RHD cars



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
98634775901
Product Information
Product Information
Bracket for Power steering return line.



Fits:
Porsche 986 Boxster 1997-04

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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98634775901
98634775901

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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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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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00004330574
Product Information
Product Information
Power steering fluid.  1 Litre

Pentosin Hydraulic System Fluid



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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
99634745113
Product Information
Product Information
Power Steering Pressure Line, LHD.

The Porsche Power Steering Pressure Line 99634745113 is a genuine replacement hydraulic line for the power-assisted steering system on selected left-hand-drive Porsche 986 Boxster and 996 models.

Fits:

  • Porsche Boxster 986 2.5L 1997-99
  • Porsche Boxster 986 2.7L 1999-01
  • Porsche Boxster S 986 3.2L 1999-01
  • Porsche 996 C2 3.4L 1997-08/01
  • Porsche 996 C4 3.4L 1997-08/01
  • Porsche 996 C2 3.6L 09/01-2001
  • Porsche 996 C4 3.6L 09/01-2001
  • Porsche 996 C4S 3.6L 09/01-2001
  • Porsche 996 TURBO 2000-01
  • Porsche 996 GT2 2001-01
  • Porsche 996 GT3 MKI 1999-01

Diagram Ref No 1

The pressure line carries hydraulic fluid under pressure through the power steering system, helping transfer hydraulic assistance to the steering rack when the steering wheel is turned.

Because the line operates under significant hydraulic pressure, secure fittings and leak-free pipework are essential. This genuine Porsche replacement is suitable for renewing an original pressure line that has become corroded, damaged, cracked or is leaking.

What This Product Does:
The hydraulic power steering system reduces the physical effort required to turn the front wheels.

The power steering pump circulates hydraulic fluid under pressure, while the pressure line carries this fluid towards the steering gear where hydraulic assistance is applied.

Its main functions include:

  • Carrying pressurised power steering fluid
  • Supplying hydraulic pressure to the steering system
  • Supporting power-assisted steering operation
  • Helping reduce steering effort
  • Maintaining a sealed hydraulic circuit
  • Supporting smooth and consistent steering response
  • Maintaining the correct factory routing between steering components
  • Preventing hydraulic fluid loss when correctly sealed

The pressure line itself does not generate hydraulic pressure; it safely transfers the pressure produced by the power steering pump.

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

Common symptoms of a failing pressure line include:

  • Visible power steering fluid leakage
  • Wet or oily deposits around the line
  • Leakage around unions or fittings
  • Falling power steering fluid level
  • Fluid stains beneath the vehicle
  • Steering becoming heavier than normal
  • Intermittent loss of steering assistance
  • Whining or groaning from the power steering pump
  • Noise when turning the steering wheel
  • Foaming or aeration in the power steering fluid
  • Cracked or deteriorated flexible hose sections
  • Corrosion on metal pipe sections
  • Damaged or distorted pipework
  • Burning-fluid smell if leaked fluid reaches hot components

Heavy steering or pump noise can also be caused by a failing pump, steering rack or other hydraulic lines, so the complete system should be inspected before replacement.

Why Replacement Matters:
The power steering pressure line must contain hydraulic fluid at substantial operating pressure.

If the line develops a leak, the fluid level can gradually fall and hydraulic assistance may become weaker or inconsistent. A significant leak can eventually result in a noticeable increase in steering effort.

Continued operation with insufficient power steering fluid can also cause the pump to run without adequate lubrication and cooling, potentially resulting in expensive pump damage.

A deteriorated pressure line can also fail suddenly, causing rapid fluid loss.

Replacing a leaking or damaged pressure line helps restore:

  • Correct hydraulic pressure
  • Reliable power-assisted steering
  • Consistent steering effort
  • A sealed power steering circuit
  • Correct fluid circulation
  • Protection of the power steering pump and steering rack
  • Factory-correct line routing and connections

Addressing a small leak early can therefore help prevent damage to more expensive steering components.



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99634745113
99634745111
99634745108
99634745113

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Special Order item
99634745231
Product Information
Product Information
Power steering pressure line, for RHD cars.



Fits:
Porsche 986 Boxster >>2001 RHD cars
Porsche 996 Carrera >>2001 RHD cars , Rear-wheel drive
F             >> 99-4S630 356
F             >> 99-4S603 928
F             >> 99-4S642 725
Porsche 996 GT2 >> 2001 RHD cars
Porsche 996 GT3 1999-04

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Diagram ref no 1

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99634745231

99634745204
99634745231

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Special Order item
98634744318
Product Information
Product Information
Power steering pressure line.



Fits:
Porsche 986 Boxster >>2003

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

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98634744318
98634744309
98634744310
98634744312
98634744313
98634744316
98634744318

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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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Special Order item
99634745012
Product Information
Product Information
Power steering return line, for RHD cars



Fits:
Porsche 986 Boxster >>2001 RHD
Porsche 996 Carrera >>2001 RHD, Rear-wheel drive
F             >> 99-4S630 356
F             >> 99-4S603 928
F             >> 99-4S642 725
Porsche 996 Turbo GT2 2001 RHD
Porsche 996 GT3 >>2001 RHD

Click 'Zoom in' for large parts diagram.
Diagram ref no 2

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99634745012
99634745012
99634745008
99634745003

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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). 


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

99634701111P
99634701107
99634701104
99634701106
99634701110
99634701111

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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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DISPLAYING 1 to 16 (of 19 products)
1 2
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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