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- 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)
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.
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90134720102
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The Porsche Genuine OE Inner Tie Rod / Steering Rack End (Part No. PAB423810A) is an original factory steering linkage component designed for Porsche Cayenne 9YA.1 and 9YA.2 (E3) models. It is the inner section of the tie rod assembly, connecting directly to the steering rack and working together with the outer tie rod end to transmit steering input to the wheels.
Sold individually, Fits left and right side (inner position).
Fits:
Porsche 9YA.1 (E3) Cayenne 2018 - 2023
Porsche 9YA.2 (E3 II) Cayenne 2024 >>
Diagram ref no 2
The inner tie rod transfers movement from the steering rack and pinion system to the outer tie rod and wheel hub, enabling accurate steering control.
As part of the steering linkage, it ensures precise wheel direction, stability, and alignment, while allowing articulation as the suspension moves.
Functions & Technical Role
• Steering transmission: Transfers movement from steering rack to wheels
• Alignment control: Maintains correct tracking and geometry
• Articulation: Works with ball joints for smooth suspension movement
• Stability support: Ensures responsive and predictable steering
• OEM precision: Engineered to Porsche tolerances for durability and performance
Tie rods are critical components linking the steering system to the wheel spindle, and wear can directly affect handling and tyre wear.
Fitment / Position on car:
• Fitting position: Front axle
• Location: Inner steering linkage (between steering rack and outer tie rod)
Inner tie rods are subject to constant load, vibration, and steering movement. Over time, wear can lead to:
• Loose or vague steering feel
• Uneven tyre wear
• Knocking or play in steering
• Poor alignment and handling
Replacing with a genuine Porsche OE rack end restores steering precision, improves safety, and ensures long-term reliability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAB423810A
The product you are viewing cross references to these numbers
- Porsche 9YA Cayenne V6 3.0L Petrol (340Hp) 2018-23
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This OE match inner tie rod is a direct replacement for the original Porsche component used in the front steering system of Cayenne 9YA models (2018 onwards, including facelift 9YA.2). Installed between the steering rack and outer tie rod end, it forms the inner section of the steering linkage.
Sold individually, Fits left and right side (inner position).
Fits:
Porsche 9YA.1 (E3) Cayenne 2018 - 2023
Porsche 9YA.2 (E3 II) Cayenne 2024 >>
Diagram ref no 2
Manufactured to OE specifications, it features a precision ball joint assembly and threaded shaft, allowing smooth articulation and accurate steering input transfer. The component is engineered for durability, using high-strength materials designed to withstand constant movement, load, and road conditions.
Positioned as a front inner tie rod (rack side), it ensures proper connection within the rack-and-pinion steering system. It is compatible with both left and right sides, making it a versatile replacement part supplied individually.
This component transfers steering input from the steering rack to the outer tie rod and ultimately to the wheel hub. It allows the wheels to turn precisely while maintaining alignment and stability, ensuring responsive handling and control.
Function
• Connects steering rack to outer tie rod assembly
• Transfers steering input to the wheels
• Allows controlled articulation via internal ball joint
• Maintains correct steering geometry and alignment
• Supports precise and stable steering response
Inner tie rods are subject to continuous steering movement and road stress. Over time, internal joints can wear, leading to looseness in the steering system. A worn inner tie rod can cause poor handling, uneven tyre wear, and reduced steering precision. Replacing it restores accurate steering response and vehicle stability.
When to replace
• Loose or vague steering feel
• Knocking or clunking from steering system
• Uneven tyre wear or alignment issues
• Excessive play in steering linkage
• During steering or suspension overhaul
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAB423810A
The product you are viewing cross references to these numbers