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- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Porsche 924S / 944 - Power Steering Oil Cooler Return Line
Maintain Proper Steering Fluid Circulation and Cooling
The power steering oil cooler return line for the Porsche
924S and 944 is an essential hydraulic hose within the power assisted steering
system. This return line carries cooled steering fluid from the oil cooler back
to the reservoir, ensuring continuous circulation and stable operating
temperatures.
Fits:
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Diagram Ref No 31
Maintaining correct fluid return flow is critical to protect the steering pump, maintain steering assist and preserve overall hydraulic system performance.
What the Power Steering Oil Cooler Return Line Does
In the Porsche 924S and 944, the power steering system uses hydraulic pressure to reduce steering effort. As the steering fluid circulates, it generates heat, particularly during spirited driving or extended use.
The oil cooler helps regulate fluid temperature, and the
return line:
- Transfers cooled hydraulic fluid back to the reservoir
- Maintains steady fluid circulation
- Supports consistent steering assistance
- Reduces heat-related wear on steering components
- Helps prevent pump strain and noise
Without a properly functioning return line, the system can lose fluid or experience overheating, affecting steering reliability.
Why Oil Cooler Return Lines Fail
Over time, the oil cooler return hose can deteriorate due
to:
- Heat exposure from the engine bay
- Continuous contact with hydraulic fluid
- Rubber hardening and cracking
- Age-related material fatigue
- Vibration and movement during driving
- Corrosion at metal connections
Because Porsche 924S and 944 models are now classic vehicles, original hoses are often decades old and at risk of sudden failure.
Common signs of failure include:
- Power steering fluid leaks under the front of the car
- Damp or oily residue near hose fittings
- Low power steering fluid levels
- Whining noise from the steering pump
- Increased steering effort
When You Should Replace the Return Line
You should replace the power steering oil cooler return line
if:
- Visible cracks or brittleness are present
- There are signs of fluid seepage
- Steering feels heavier than normal
- he steering pump becomes noisy
- You are servicing the steering rack or pump
- The vehicle is undergoing restoration or preventative maintenance
Proactive replacement reduces the risk of fluid loss and protects expensive steering components from damage.
At Design911, we supply high-quality power steering hoses manufactured to meet OEM standards. This oil cooler return line is designed for correct fitment and reliable performance under daily driving and performance conditions.
Replacing aged steering hoses improves system reliability, reduces the risk of leaks and maintains precise steering control.
Key Benefits at a Glance
- Direct fit for Porsche 924S and 944
- Returns cooled steering fluid to reservoir
- Maintains stable hydraulic circulation
- Reduces risk of leaks and overheating
- Ideal for maintenance or restoration
- Helps preserve steering pump and rack longevity
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94434745902
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Fits:
For cars (M657) with power assisted steering
For LHD Cars
Porsche 924S 1986-88
Porsche 944 1985-91
Porsche 968 1992-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 29.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94434744703
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Fits:
Porsche 924S 1986-88 (M657)
Porsche 944 1982-91 (M657)
Porsche 968 1992-95 (M657)
M657 - Cars with power assisted steering
Diagram ref no 29.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94534744702
The product you are viewing cross references to these numbers
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Fits:
Porsche 924 S 1986-88 Cars with Power assist steering (M657) * Requires a Fitting to update and re-route from original hose (part no 99923035701).
Porsche 944 1985-88 Cars with Power assist steering (M657) * Requires a Fitting to update and re-route from original hose (part no 99923035701).
Porsche 944 1989-91
Porsche 968 1992-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 26
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94434744506
The product you are viewing cross references to these numbers