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- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Rear Suspension Bearing Pin - fits Left or Right Hand Side
Restore the integrity and serviceability of your Porsche 928
rear suspension with this OE Match Rear Suspension Bearing Pin.
Manufactured to original Porsche specifications and finished with a durable
galvanised coating for long-term corrosion protection, this replacement bearing
pin is supplied complete with two new fixing nuts for a professional-quality
installation.
Fits:
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Diagram ref no 17
Suitable for all Porsche 928 model years from 1978 to 1995,
including the highly desirable GTS models, this suspension bearing pin forms a
critical mounting point within the rear suspension assembly. It is the primary
fixing bolt that secures the rear shock absorber to the rear axle wheel carrier
and plays an essential role in maintaining suspension geometry, stability and
ride quality.
What Does the Rear Suspension Bearing Pin Do?
The rear suspension bearing pin acts as the main fixing point between the rear shock absorber and the rear suspension carrier assembly.
Its primary functions include:
- Securing the rear shock absorber
- Maintaining suspension alignment
- Supporting suspension movement
- Helping control wheel motion
- Preserving ride quality
- Supporting vehicle stability
- Maintaining safe suspension operation
Without a correctly fitted and structurally sound bearing pin, the rear suspension cannot function as designed.
Why Do Rear Suspension Bearing Pins Fail?
Although manufactured from high-strength steel, these bolts are exposed to decades of road use and harsh environmental conditions.
Common causes of deterioration include:
- Corrosion from water and road salt
- Galvanic corrosion between suspension components
- Long-term moisture exposure
- Seizure within the suspension carrier
- Thread damage during removal
- Age-related deterioration
- Previous incorrect installation
- Suspension refurbishment work
Many original bolts become heavily corroded, often making removal extremely difficult during suspension repairs.
Common Problems During Removal
On many Porsche 928 models, including low-mileage and well-maintained vehicles, the original bearing pin can become seized within the rear wheel carrier and shock absorber mounting.
In severe cases:
- The bolt may be impossible to remove conventionally
- The shock absorber lower mount may need cutting away
- Corroded hardware may require grinding off
- Hydraulic pressing equipment may be needed to remove the seized pin
- Replacement hardware becomes essential during reassembly
This is why replacement bearing pins are commonly fitted whenever rear suspension refurbishment or shock absorber replacement is carried out.
Symptoms of a Worn or Damaged Bearing Pin
Potential warning signs include:
- Corrosion visible on the bolt
- Damaged threads
- Suspension looseness
- Difficulty tightening to specification
- Excessive wear during inspection
- Movement within the mounting point
- Signs of previous corrosion damage
Even if no symptoms are present, heavily corroded original hardware should be replaced during suspension work.
When Should the Rear Suspension Bearing Pin Be Replaced?
Replacement is recommended when:
- Replacing rear shock absorbers
- Restoring rear suspension components
- Corrosion is present
- Removing seized original hardware
- Performing preventative maintenance
- Carrying out a full suspension rebuild
- Restoring a Porsche 928 to factory condition
Most Porsche specialists replace these bolts as a matter of course whenever the rear shocks are removed.
Why Replacement Matters
Replacing ageing suspension hardware helps ensure long-term reliability and ease of future servicing.
Benefits include:
- Improved corrosion resistance
- Reliable suspension mounting
- Correct factory fitment
- Improved serviceability
- Enhanced safety
- Long-term durability
- Professional restoration quality
- Reduced future maintenance issues
The galvanised finish provides excellent protection against corrosion, helping the new bearing pin remain serviceable for years to come.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92833164101
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