Power Steering Pipes / Hoses / Radiators

Power steering pressure line.



Fits:
Porsche 987.2 Boxster 2009-12
Porsche 987.2C Cayman 2009-12

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

Power steering pressure line
This OE Match power steering pressure line is a replacement hydraulic steering pipe used on Porsche 987.2 Boxster and Cayman models. It is designed to carry pressurised power steering fluid through the steering system, matching the original-style fitment and function.

Fits:
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.2 Cayman 2009 - 2012

Diagram ref no 7

The power steering pressure line transfers hydraulic fluid under pressure between the power steering pump and steering rack system. This hydraulic pressure assists steering movement, helping provide smooth, controlled and responsive steering operation.

Functions
• Carries pressurised power steering fluid through the steering system
• Connects power steering components in the hydraulic circuit
• Supports smooth and assisted steering operation
• Helps maintain correct steering system pressure
• Replaces leaking, corroded, cracked or damaged original pipework
• Helps prevent power steering fluid loss and steering assistance failure
• OE Match replacement for correct fit and reliable steering performance

Why Replace This Part?
Power steering pressure lines are exposed to high hydraulic pressure, heat, vibration, road dirt and corrosion. Over time, the pipe or hose sections can crack, leak, rust, swell or fail at the fittings. A worn pressure line may cause fluid leaks, whining noises from the pump, heavy steering or loss of power steering assistance. Replacing the line helps restore proper hydraulic pressure and protects the steering system from damage caused by low fluid levels.

When to replace
•  Power steering fluid is leaking from the pipe or fittings
•  The line is corroded, cracked, swollen, kinked or damaged
•  Steering feels heavy or inconsistent
•  There is a whining or groaning noise from the power steering pump
•  Fluid level drops repeatedly after topping up
•   The steering rack or power steering pump is being replaced
•   The vehicle is undergoing steering system repair or maintenance
•   As preventative replacement when old hydraulic lines show signs of wear.

Where it fits on the car
This pressure line fits in the hydraulic power steering system on Porsche 987.2 Boxster and Cayman models. It forms part of the steering fluid circuit, routing pressurised fluid between the steering pump and steering rack area, depending on vehicle specification.

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

9A134744316

The product you are viewing cross references to these numbers

Power steering pressure line.



Fits:
For RHD Cars
Porsche 997.1 Carrera 2005-08
Porsche 997.1 Turbo / GT2 2007-10
Porsche 997.1 GT3 >>2008
Porsche 997.2 GT2 RS
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2005-08

Click 'Zoom in' for large parts diagram.
Diagram ref no 22

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

99734756404

The product you are viewing cross references to these numbers

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.

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

99634744911

The product you are viewing cross references to these numbers

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

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

99634745012

The product you are viewing cross references to these numbers

Power steering return line.



Fits:
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2005-08

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

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

98734743905

The product you are viewing cross references to these numbers

Power steering return line for LHD cars.



Fits:
For LHD cars
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman 2005-08 (not for S models)
Porsche 997.1 Turbo 2007-10
Porsche 997.2 GT2 RS 2011-13

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

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

98734744907

The product you are viewing cross references to these numbers

Power steering return line.



Fits:
Porsche 987.2 Boxster 2009-12
Porsche 987C.2 Cayman 2009-12

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

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

9A134743921

The product you are viewing cross references to these numbers

Power steering return line. For RHD cars



Fits:
For RHD cars only
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2006-08
Porsche 997.1 Carrera 2005-08
Porsche 997.1 Turbo 2007-09
Porsche 997.2 GT2 RS 2010-13
Porsche 997 GT3 2007-11

Click 'Zoom in' for large parts diagram.
Diagram ref no 24

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

99734746204

The product you are viewing cross references to these numbers

Repair kit hydraulic pipe comprising spring and o-ring. 



Fits: 
Porsche 987.2 Boxster / Cayman - 2009 to 2012
Porsche 997.2 - 2009 to 2012
Porsche 991.1 - 2012 to 2016
Porsche 991.2 - 2016 to 2019
Porsche 991 turbo - 2012 to 2019
Porsche 970 Panamera - 2010 to 2016

For power steering of PDDC hydraulic lines

Click 'Zoom in' for large parts diagram.
Diagram ref no 21


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

9P1698009

The product you are viewing cross references to these numbers

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

The product you are viewing cross references to these numbers

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  

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

99634701210P

The product you are viewing cross references to these numbers

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 987 2.7L 2005 -08/08
• ·         Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• ·         Porsche 997 MK1 Carrera 2 3.6L 2005-08
• ·         Porsche 997 MK1 Carrera 2S 3.8L 2005-08
• ·         Porsche 997 MK1 Carrera 4 3.6L 2005-08
• ·         Porsche 997 MK1 Carrera 4S 3.8L 2005-08
• ·         Porsche 997 MK1 TURBO 2007-09
• ·         Porsche 997 MK1 GT3 2007-09
• ·         Porsche 997 MK1 GT2 2007-09
• ·         Porsche 997 MKII Carrera C2 3.6L 2009-12
• ·         Porsche 997 MKII Carrera C4 3.6L 2009-12
• ·         Porsche 997 MKII Carrera C2S 3.8L 2009-12
• ·         Porsche 997 MKII Carrera C4S 3.8L 2009-12
• ·         Porsche 997 MKII GT3 2010-11
• ·         Porsche 997 MKII Turbo 2010-13
• ·         Porsche 997 MKII GT2 RS 2011-13
• ·         Porsche Cayman 2.7L 987C 2006-08
• ·         Porsche Cayman S 3.4L 987C 2005-08

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

99734701208P

The product you are viewing cross references to these numbers

Replacement stainless steel pipes for LHD (Left Hand drive) power steering rack
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 987 2.7L 2005 -08/08
Porsche Boxster 987 S 3.2/3.4L 2005-08/08
Porsche 997 MK1 Carrera 2 3.6L 2005-08
Porsche 997 MK1 Carrera 2S 3.8L 2005-08
Porsche 997 MK1 Carrera 4 3.6L 2005-08
Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Porsche 997 MK1 TURBO 2007-09
Porsche 997 MK1 GT3 2007-09
Porsche 997 MK1 GT2 2007-09
Porsche 997 MKII Carrera C2 3.6L 2009-12
Porsche 997 MKII Carrera C4 3.6L 2009-12
Porsche 997 MKII Carrera C2S 3.8L 2009-12
Porsche 997 MKII Carrera C4S 3.8L 2009-12
Porsche 997 MKII GT3 2010-11
Porsche 997 MKII Turbo 2010-13
Porsche 997 MKII GT2 RS 2011-13
Porsche Cayman 2.7L 987C 2006-08
Porsche Cayman S 3.4L 987C 2005-08

This line set is an upgrade for the leaky, corroded OE steel lines, for a new rack installation or for anyone planning to have a steering rack remanufactured. This set is manufactured in Germany from high-grade stainless steel with galvanized connections for many years of worry-free operation.

Features: 

• Manufactured from High-Grade Stainless Steel 
• Set Includes 2 Fluid Transfer Lines - To and From the Rotary Valve
• Includes Corrosion Resistant Threaded Galvanized Ends
• Restores Precise Steering
• Exceeds OE Specifications

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

99734701111GP

The product you are viewing cross references to these numbers

Support bracket for solid brake, clutch and power steering lines. 



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

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

99635554300

The product you are viewing cross references to these numbers

Threaded joint for power steering pipes, NW10



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

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

99923055110

The product you are viewing cross references to these numbers