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Your Vehicle  //  Porsche  //  993 (911) (1994-1998)  //  993 (911) TURBO S 1994-97
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99734113100
Product Information
Product Information

This Porsche wheel hub retaining bolt forms part of the hub securing arrangement on the applications listed below. Also described as a tension bolt, works with the associated retaining nut in the wheel hub and bearing assembly.

Fits:

  • Porsche Boxster 987 2.7L 2005–08/08
  • Porsche Boxster 987 S 3.2/3.4L 2005–08/08
  • Porsche Boxster 987 MKII 2.9L 2009–12
  • Porsche Boxster S 987 MKII 3.4L 2009–12
  • Porsche Boxster 981 2.7L 2012–16
  • Porsche Boxster 981 S / GTS 3.4L 2012–16
  • Porsche Boxster 981 Spyder 3.8L 2016
  • 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 / GT3 RS 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 / GT3 RS 2010–11
  • Porsche 997 MKII Turbo 2010–13
  • Porsche 997 MKII GT2 RS 2011–13
  • Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012–16
  • Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012–16
  • Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012–16
  • Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012–16
  • Porsche Cayman 2.7L 987C 2006–08
  • Porsche Cayman S 3.4L 987C 2005–08
  • Porsche Cayman 2.9L 987C MKII 2009–12
  • Porsche Cayman S / R 3.4L 987C MKII 2009–12
  • Porsche Cayman 2.7L 981 2013–16
  • Porsche Cayman S / GTS 3.4L 981 2013–16


Diagram Ref No 5

Check fitment for your specific vehicle (model, year, engine) before ordering.


What Is This Part?
The retaining bolt is a securing component within the wheel carrier, wheel bearing and hub assembly. It works with a separate retaining nut to hold the hub assembly together in its intended position. Its condition matters when the hub or bearing is removed, because damaged threads or seating surfaces can prevent correct reassembly. During this work, inspect the bolt alongside the nut and the surrounding components rather than assessing it in isolation.


What Does This Part Do?

  • Retains the hub assembly: Forms part of the securing arrangement for the wheel hub and bearing.
  • Works with the retaining nut: Provides the fastening connection used to secure the assembly.
  • Supports correct reassembly: Sound threads and seating surfaces allow the fixing to be installed according to the applicable workshop procedure.


Why Replace This Part?
Replacement may be needed if inspection finds damaged threads, significant corrosion, distortion or damage caused during removal. These defects can interfere with the bolt seating correctly or with the nut engaging as intended. A seized fixing should also be checked carefully after removal, especially if force or cutting tools were needed to dismantle the assembly.

Wheel bearing or hub replacement provides an opportunity to inspect this bolt, but does not by itself establish that the bolt is defective. Follow the vehicle-specific workshop instructions for fastener reuse, associated nut replacement and tightening procedure; do not assume the same requirements apply to every listed model.


When to Replace This Part?

  • Damaged threads: The retaining nut cannot engage correctly, or the threads show stripping or cross-threading.
  • Significant corrosion: Deterioration affects the fixing or its seating surfaces.
  • Visible damage: The bolt is bent, cracked or marked by removal tools in a way that affects its function.
  • Poor seating: Inspection confirms that damage to the bolt prevents correct assembly.
  • Workshop requirement: The applicable repair instructions specify renewal after removal.


Wheel play, vibration or bearing noise requires inspection of the complete hub and bearing assembly; these symptoms do not identify the retaining bolt as the cause on their own.


Where Is This Part Fitted?
Location: At the wheel hub centre, within the wheel carrier and bearing assembly, where it works with the associated retaining nut.


Product Summary

  • Product: Wheel hub retaining bolt, also described as a tension bolt.
  • Brand: Porsche.
  • Part number: 99734113100.
  • Purpose: Forms part of the wheel hub and bearing securing arrangement.
  • Repair context: Inspection or renewal during applicable wheel hub and bearing work.


Related reference numbers
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99734113100
99734113100

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