IMS Bearing Cap. Porsche 986 Boxster / 996 Carrera / 997.1 Carrera › 99610502403

This genuine Porsche IMS bearing cap serves the intermediate shaft bearing assembly on selected Porsche engines. It provides the cover and mating interface needed when replacing an existing cap that has damaged seating or sealing surfaces.

Fits

• Porsche 986 Boxster 1997–04
• Porsche 996 Carrera 2 1998–05
• Porsche 996 Carrera 4 1999–2001
• Porsche 996 Carrera 4S 2002–2005
• Porsche 997.1 Carrera 2 2005–2008*
• Porsche 997.1 Carrera 2S 2005–2008*
• Porsche 997.1 Carrera 4 2005–2008*
• Porsche 997.1 Carrera 4S 2005–2008*
  
  *Only for cars fitted with Intermediate shaft 996.105.901.02
  
  

Suitability depends on the engine specification, production identification and installed intermediate shaft assembly, not the model-family listing alone. Check fitment for your specific vehicle (model, year, engine) before ordering.

What Is This Part?

The IMS bearing cap is a housing component associated with the engine’s intermediate shaft bearing position. It covers this area and provides contact surfaces for adjoining components and their sealing arrangement. The condition of these interfaces matters when the assembly is dismantled and rebuilt. This cap is an ancillary component, rather than an IMS bearing replacement kit or a timing-chain tensioner.

What Does This Part Do?

• Covers the bearing position: Forms the cap at the intermediate shaft bearing area.
• Provides a mating interface: Gives adjoining components the contact surfaces needed for assembly.
• Accommodates sealing components: Works with the associated seals at the cap interface.
• Allows damaged housing renewal: Replaces an existing cap found unsuitable for refitting after inspection.
  
  Why Replace This Part?

Replacement may be appropriate if the existing cap is cracked, deformed or damaged around its mating surfaces or fixing locations. A cap that cannot seat correctly should be assessed before the assembly is put back together, particularly during engine rebuilding or intermediate shaft maintenance.

Inspect the bearing, adjoining seals, fasteners and mounting surfaces at the same time. Oil leakage alone does not identify a defective cap: establish the source before replacing components, because nearby seals can produce similar evidence. Changing the cap alone does not remedy a deteriorated IMS bearing.

.When to Replace This Part?

• Visible damage: Cracks, deformation or other deterioration found during dismantling.
• Marked contact surfaces: Damage affecting the cap’s seating or sealing interfaces.
• Damaged fixing locations: Wear or damage that prevents correct assembly.
• Poor seating: Evidence that the previous cap was fitted unevenly or no longer sits correctly.
• Oil traces at the interface: Inspect the cap and surrounding seals to identify whether the cap itself needs renewal.
  
  Where Is This Part Fitted?

Location: At the intermediate shaft bearing position within the engine’s IMS assembly. The cap interfaces with adjoining housing and sealing components; match it to the installed intermediate shaft specification.

Technical Details

• Supersession: Part 99610502403 supersedes 99610502401.
• 997.1 shaft identification: The specified application uses intermediate shaft 996.105.901.02.
  
  FAQs

• When should the cap be renewed? When inspection reveals damage, poor seating or deterioration that makes it unsuitable for refitting. Dismantling alone does not mean a sound cap must be replaced.
• Does an oil leak prove the cap has failed? No. Inspect the cap and surrounding sealing components to establish the source.
• Does this replace the IMS bearing? No. The cap serves the bearing assembly; bearing condition requires separate assessment.
• How is suitability checked? Match the VIN, engine identification, production restrictions and original component reference. IMS assemblies can differ according to engine specification and production date.

Product Summary

• Product: Intermediate shaft bearing cap.
• Brand: Genuine Porsche.
• Part number: 99610502403.
• Previous reference: 99610502401.
• Purpose: Covers the IMS bearing position and provides mating and sealing interfaces within the assembly.

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

99610502403

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