retainer plate Genuine Porsche part 90134724800

Steering Rack Rubber Coupling 

Restore the precision and confidence of your Porsche steering system with this OE Match Steering Rack Rubber Coupling. Designed for Porsche 911, Porsche 912 and Porsche 914 models, this critical steering component connects the steering column to the steering rack while helping to absorb vibration, reduce shock loads and maintain smooth steering operation.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)

Diagram ref no 18

Often referred to as a steering coupler, steering flex disc or steering rubber coupling, this component provides a flexible connection within the steering system. It allows steering inputs to be transmitted accurately while isolating the steering wheel from road shocks and vibration.

As the coupling ages, the rubber material can deteriorate, crack or develop excessive play. Replacing a worn steering rack coupling helps restore steering accuracy, improve driver confidence and maintain the direct steering feel that classic Porsche models are renowned for.

What Does a Steering Rack Rubber Coupling Do?

The steering rack rubber coupling connects the steering shaft to the steering rack assembly.

Its primary functions include:

• Transferring steering input to the steering rack
• Absorbing road vibration
• Reducing steering shock loads
• Isolating unwanted steering feedback
• Supporting smooth steering operation
• Maintaining steering precision
• Improving driver comfort

The coupling plays an important role in balancing steering feel with mechanical protection.

Why Do Steering Rack Rubber Couplings Fail?

Over time, the coupling is subjected to constant steering movement, environmental exposure and age-related deterioration.

Common causes of failure include:

• Rubber ageing and hardening
• Cracking and splitting
• Heat exposure
• Oil contamination
• General wear and fatigue
• Moisture and environmental damage
• High mileage use
• Long-term storage deterioration

As the rubber deteriorates, the coupling can develop excessive movement which directly affects steering precision.

When Should a Steering Rack Rubber Coupling Be Replaced?

The coupling should be inspected whenever steering work is carried out or if steering performance begins to deteriorate.

Common symptoms include:

• Excessive steering play
• Loose steering feel
• Delayed steering response
• Steering wheel vibration
• Clunking noises during steering inputs
• Cracked or perished rubber
• Visible deterioration of the coupling
• Reduced steering precision

Any visible cracking or excessive movement is a clear indication that replacement is required.

Why Replacement Matters

A worn steering coupling can significantly affect steering accuracy and driving confidence.

Benefits of replacement include:

• Improved steering precision
• Reduced steering play
• Better steering response
• Improved driver confidence
• Reduced vibration transfer
• Enhanced steering feel
• Improved vehicle safety
• Preservation of factory steering characteristics

For classic Porsche models, maintaining steering system integrity is essential to preserving the driving experience Porsche originally intended.

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

90134720102

The product you are viewing cross references to these numbers

Steering Column Bearing Support Bush.
OEM Part Number: 90134722303/1



Fits:
Porsche 911 1965-89
Porsche 914 1970-76

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


Powerflex. Replacing your car rubber bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components

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

PFF57-405

The product you are viewing cross references to these numbers

Steering Column Bearing Support Bush.
OEM Part Number: 90134722303/1



Fits:
Porsche 911 1965-89
Porsche 914 1970-76

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

Powerflex Black Series - Designed for the Track - Ready to Race - Engineered to be the best.

Powerflex Black Series bushes are manufactured using a 95 Shore A compound to provide maximum control of chassis geometry. This compound can be up to 80% more resistant to load than standard rubber and 25% stiffer than our purple performance material.

If your requirements are purely for the ultimate in handling and chassis performance then Powerflex Black Series are unique, offering the most precise and accurate alignment for your chassis.

Replacing your car rubber bushes with Polyurethane Suspension Bushes will give you:

- Better road holding
- Constant steering geometry
- Increased tyre life
- More responsive steering
- Longer service life of suspension components

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

PFF57-405BLK

The product you are viewing cross references to these numbers

Steering Shaft.



Fits:
Porsche 911 /S/TU/L 1965-68 Chassis no F 030 5101>>
Porsche 912 COUPE 1965-68 Chassis no F 035 4001>> and F 045 8101>>
Porsche 911 1969-89
Porsche 911 (930) Turbo 1975-89

Click 'Zoom in' for large parts diagram.
Diagram ref no 19

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

90134721004

The product you are viewing cross references to these numbers

Steering shaft rubber bush & bearing. Porsche 911 65-89 / 914



Fits:
Porsche 911 1965-89
Porsche 914 1970-76

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

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

91134702901

The product you are viewing cross references to these numbers

Steering rack tab washer.
2 required per car. Sold as single.



Fits:
Porsche 911 1965-89
Porsche 930 Turbo 1975-89
Porsche 914 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 23

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

90134724800

The product you are viewing cross references to these numbers

Bracket for steering column housing.



Fits:
Porsche 911 / 912 1965-89
Porsche 914 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 26

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

90134722101

The product you are viewing cross references to these numbers