Chains & Tensioners

Engine timing chain kit for oil pump gear.

Fits:
Porsche 987.2 Boxster / Boxster S - 2009 to 2012
Porsche 987C.2 Cayman / Cayman S
Porsche 981 Boxster - 2012 to 2016
Porsche 981C Cayman - 2013 to 2016
Porsche 718 Boxster / Boxster S - 2017 Onwards
Porsche 718 Cayman / Cayman S - 2017 Onwards
Porsche 997.2 - 2009 to 2012
Porsche 991.1 - 2012 to 2016

Contains
1 x Drive chain 9A110523302
1 x Tensioner blade 9A110523502
1 x Socket head bolt 9A110506201
1 x O-ring 99970734640

Click 'Zoom in' for large parts diagram.
Diagram ref no 2, 3, 10 and 11

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9A110523302

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Guide Rail - Cylinder 1-3 and  4-6

Fits:
Porsche 986 Boxster 2.7L /  3.2L  2003 - 2004
with Engine codes: M96.23 / M96.24

Porsche 987 Boxster 2.7L / 3.2L / 3.4L 2005 - 2008
with Engine codes M96.25 / M96.26 / M97.20 / M97.21 / M97.22

Porsche 987C 2.7L / 3.4L Cayman 2006 - 2008
with Engine codes  M97.20 / M97.21 / M97.22

Porsche 996 3.6L C2 / C4 / C4S 2002 - 2005
with Engine codes M96.03

Porsche 997.1 3.6L /3.8L  2005 - 2008
with Engine codes M96.05 / M97.01

Diagram Ref No 33.

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996105

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Guide rail
The timing chain tensioner is designed to maintain correct chain tension in Porsche M96 and M97 engines. This hydraulic tensioner ensures the timing chain remains tight, properly aligned, and stable across all engine speeds, preventing chain slack, noise, and timing deviation.

Fits:
Porsche 986 Boxster 2.7L /  3.2L  2003 - 2004
with Engine codes: M96.23 / M96.24

Porsche 987 Boxster 2.7L / 3.2L / 3.4L 2005 - 2008
with Engine codes M96.25 / M96.26 / M97.20 / M97.21 / M97.22

Porsche 987C 2.7L / 3.4L Cayman 2006 - 2008
with Engine codes  M97.20 / M97.21 / M97.22

Porsche 996 3.6L C2 / C4 / C4S 2002 - 2005
with Engine codes M96.03

Porsche 997.1 3.6L /3.8L  2005 - 2008
with Engine codes M96.05 / M97.01

Diagram Ref No 33.

Built to original Porsche specifications, the tensioner uses controlled oil pressure to absorb chain vibration and compensate for thermal expansion, ensuring precise valve timing and smooth engine operation. 

Over time, the timing chain tensioner can weaken internally, allowing the chain to develop slack and produce rattling noises, especially on start-up. A failing tensioner can cause timing drift, poor running, and accelerated wear of the guides and sprockets. If left unresolved, the chain may even skip a tooth, risking serious internal engine damage. Replacing the tensioner restores stable chain control, accurate timing, and long-term engine protection.

When to replace:
• You hear chain rattle, especially during cold start
• Fault codes or symptoms indicate timing deviation
• Engine runs rough, lacks power, or shows intermittent misfires
• Visible wear or oil leakage around the tensioner housing
• Chain guides have been replaced during an engine service
• Preventatively during M96/M97 engine rebuilds or high-mileage maintenance

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996105

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Intermediate Shaft flange Hexagon-head bolt M 6 X 20
This original Porsche fastening bolt secures the intermediate shaft bearing cover / flange to the engine assembly, helping maintain correct positioning and fastening of the intermediate shaft support components. An essential replacement part when carrying out intermediate shaft bearing repairs, engine timing system maintenance or intermediate shaft flange removal.
Sold individually, Typically 3 bolts required per intermediate shaft bearing cover / flange assembly

Fits

• Porsche 986 Boxster 2.5L 1997 - 1999  - Engine code: 9620
• Porsche 986 Boxster 2.7L 1999 - 2004  - Engine code: 9622, 9623
• Porsche 986 Boxster 3.2L 1999 - 2004  - Engine code: 9621, 9624

• Porsche 987.1 Boxster 2.7L 2005 - 2008  - Engine code: 9625, 9720
• Porsche 987.1 Boxster 3.2L 2004 - 2006  - Engine code: 9626
• Porsche 987.1 Boxster 3.4L 2006 - 2008  - Engine code: 9721, 9722

• Porsche 987C.1 Cayman 2.7L 2006 - 2008  - Engine code: 9720
• Porsche 987C.1 Cayman 3.4L 2005 - 2008  - Engine code: 9721, 9722

• Porsche 996 Carrera 3.4L 1998 - 2001  - Engine code: 9601 / 9602 / 9604
• Porsche 996 Carrera 3.6L 2002 - 2005  - Engine code: 9603 

• Porsche 997.1 Carrera 3.6L 2005 - 2008  - Engine code: 9605
• Porsche 997.1 Carrera 3.8L 2005 - 2008  - Engine code: 9701  

Diagram ref no 15

What This Product Does

The Genuine Porsche 90038509301 intermediate shaft flange hexagon-head bolt is an OE M6 x 20 mm engine fastener associated with earlier references 90037815609 and 99921715009. 

Used to secure the intermediate shaft bearing cover / flange on selected Porsche 996 Carrera, 986 Boxster, 997.1 Carrera, 987 Boxster and 987C.1 Cayman engines, it is an essential component during IMS bearing maintenance and engine repairs.

Functions

• Secures the intermediate shaft bearing cover / flange.
• Helps maintain the correct position of the intermediate shaft support assembly
• Provides the specified fastening arrangement for the IMS bearing cover
• Helps maintain even clamping of the flange assembly
• Supports correct installation of associated engine timing components
• Replaces damaged, corroded or incorrectly specified original bolts.
  
  

Technical Details

• Part number: 90038509301
• Size: M 6 X 20
• Bolt type: Hexagon-head bolt 
• Thread diameter: M6
• Length: 20 mm
• Manufacturer: Porsche
• Application: Intermediate shaft bearing cover / flange fastening

Why Replace This Part? 

The intermediate shaft flange bolts are important fasteners within the engine assembly. During intermediate shaft bearing replacement or flange removal, existing bolts may become damaged, corroded or unsuitable for reuse. 

Incorrect or damaged fasteners may affect flange clamping and compromise the secure installation of the intermediate shaft bearing cover. 

Using the correct Genuine Porsche M6 x 20 bolt helps maintain the original fastening specification and reliable assembly.

When to Replace This Part

• During intermediate shaft bearing cover removal or refitting.
• When renewing the IMS flange or related sealing components.
• If the existing bolts are damaged or corroded.
• When undertaking an engine rebuild.
• If Porsche repair instructions specify new fasteners.
• When correcting incorrect IMS mounting hardware.
• During intermediate shaft assembly service.

Where It Fits on the Car

The bolt fits at the intermediate shaft bearing cover / flange assembly, located within the engine timing drive system. The intermediate shaft forms part of the camshaft timing drive arrangement on applicable Porsche flat-six engines. 

 These bolts secure the relevant cover / flange assembly in place.

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

Related reference numbers
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90038509301

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Oil Pump Chain Guide Rail. 
The Genuine Porsche Oil Pump Chain Guide Rail 9A110523702 is a replacement guide rail for the chain-driven engine oil pump used on selected Porsche 911, Boxster and Cayman models equipped with the 9A1-family engine.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• 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 Turbo 2010-13
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12  

Diagram Ref No 13

The engine oil pump is mechanically driven from the crankshaft by a dedicated chain. This guide rail provides a controlled running surface for that chain, helping keep it correctly positioned as it travels between the crankshaft drive and oil pump sprocket.

Although the guide rail is a relatively small component, it performs an important role in the engine lubrication system.

The oil pump must rotate reliably whenever the engine is running so that engine oil can be circulated under pressure to critical internal components.

If the guide rail becomes excessively worn, cracked or damaged, the oil-pump chain may no longer run as smoothly or securely as intended. This can contribute to chain noise, abnormal chain movement, accelerated chain or sprocket wear and, in severe cases, disruption of the oil-pump drive.

Replacing a damaged guide rail helps restore the correct oil-pump chain path and supports reliable engine lubrication.

What This Product Does:
The Oil Pump Chain Guide Rail provides a smooth, accurately positioned running surface for the oil-pump drive chain.

Its main functions are to:

• Guide the oil-pump drive chain.
• Maintain correct chain alignment.
• Control chain movement.
• Reduce unwanted chain vibration.
• Prevent excessive chain whip.
• Help maintain correct engagement with the drive sprockets.
• Work with the oil-pump chain tensioner.
• Support reliable oil-pump operation.
• Reduce abnormal chain and sprocket wear.
• Replace a cracked, worn or damaged original guide.

Symptoms Of Wear Or Failure:
Possible symptoms or inspection findings can include:

• Chain rattling from the engine.
• Mechanical rattling at start-up.
• Persistent chain noise.
• Abnormal noise increasing with engine speed.
• Excessive oil-pump chain movement.
• Visible wear grooves in the guide.
• Cracked guide material.
• Broken guide sections.
• Missing guide material.
• Debris found in the engine oil or sump.
• Abnormal oil-pump chain wear.
• Chain alignment problems.
• Damaged oil-pump sprocket teeth.
• Low oil-pressure warning in severe drive-system failure.

Many of these symptoms can also originate from other engine components, so diagnosis is essential.

Why Replacement Matters:
Replacing a worn or damaged Oil Pump Chain Guide Rail helps restore:

• Correct chain alignment.
• Controlled oil-pump chain movement.
• Proper chain tracking.
• Reduced chain vibration.
• Reliable sprocket engagement.
• Smooth oil-pump drive.
• Long-term lubrication-system reliability.

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9A110523702

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Chain adjuster sealing o-ring. 18,77 x 1,78
3 per engine. Price is for each.

Fits:
Porsche 996
Porsche 986 Boxster
Porsche 987 Boxster
Porsche 987C Cayman
Porsche 997.1 Gen

Click 'Zoom in' for large parts diagram.
Diagram ref no 25

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99970734440

The product you are viewing cross references to these numbers

O-ring - 18.77 x 1.78 - for timing chain adjuster or tensioner. 

Fits:

Porsche 986 Boxster / S 1997-04 - x3 required
Porsche 987 Boxster / S 2005-08 - x3 required
Porsche 987 Cayman / S 2006-08 - x4 required

Porsche 996 Carrera 1998-05 - x3 required
Porsche 997-1 Carrera 2005-08 - x4 required

Diagram ref. 25.

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99970734440

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Tensioner Blade Pad.
1 per engine.

Fits:
Porsche 986 Boxster 1997-04
Porsche 987 MKI Boxster 2005-08
Porsche 987C MKI Cayman 2005-08
Porsche 996 Carrera 1998-05
Porsche 997 MKI Carrera 2005-08

Click picture for large parts diagram.
Diagram Ref No 19.

Tensioner Blade. 1 per engine.

Fits:
Porsche 986 Boxster / Boxster S 1997-04
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman / Cayman S 2006-08
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997 C2 / C4 / C2S / C4S 2005-08 COUPE/CABRIO

Click picture for large parts diagram.
Diagram Ref No 18.

This product supersedes Porsche's old part numbers:
- 996 105 165 54.

Tensioner Blade.1 per engine.

Fits:
Porsche 986 Boxster / Boxster S 1997-04
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman / Cayman S 2006-08
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997 C2 / C4 / C2S / C4S 2005-08 COUPE/CABRIO

Click picture for large parts diagram.
Diagram Ref No 22.

Tooth-Type Timing Chain Used To Connect The Engine’s Crankshaft To The Intermediate Shaft (IMS).

Fits:
Porsche 986 Boxster 2.7L 2001>>2004
Porsche 986 Boxster S 3.2L 2001>>2004 

Porsche 987.1 Boxster 2.7L MKI 2005>>2008
Porsche 987.1 Boxster S 3.2L MKI 2005
Porsche 987.1 Boxster S 3.4L MKI 2006>>2008

Porsche 987.1 Cayman 2.7L MKI 2005>>2008 
Porsche 987.1 Cayman S 3.4L MKI 2006>>2008

Porsche 996 Carrera 3.4L 2001
Porsche 996 Carrera 4 3.4L 2001
Porsche 996 Carrera 3.6L 2002>>2004
Porsche 996 Carrera 4 3.6L 2002>>2004
Porsche 996 Carrera 4S 3.6L 2002>>2005 
Porsche 996 Targa 3.6L 2002>>2005

Porsche 997.1 Carrera 3.6L MKI 2005>>2008
Porsche 997.1 Carrera S 3.8L MKI 2005>>2008
Porsche 997.1 Carrera 4 3.6L MKI 2006>>2008
Porsche 997.1 Carrera 4S 3.8L MKI 2006>>2008
Porsche 997.1 Targa 4 3.6L MKI 2007>>2008
Porsche 997.1 Targa 4S 3.8L MKI 2007>>2008

NOTE: For The 2001 Model Year, Porsche Replaced The Intermediate Shaft's Roller-Type (Duplex) Chain With A Tooth-Type Chain. This Listing Is For The Later Tooth-Type Chain And Is Not Compatible With Earlier Engines Equipped With The Roller-Type Chain.

While Unlikely, It's Possible That An Earlier Engine May Have Been Rebuilt And Upgraded To Use The Newer Chain Design. For This Reason, Design 911 Strongly Recommends Confirming Which Type Of Chain Your Engine Uses Before Placing An Order. To Assist With Identification, Our Product Images Include A Helpful Comparison Between The Roller-Type (Duplex) Chain And The Tooth-Type Chain.

Diagram Ref No 17  

Related reference numbers
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99610517158

The product you are viewing cross references to these numbers

Tooth-type timing chain used to connect the engine’s crankshaft to the intermediate shaft (IMS).

Fits:
Porsche 986 Boxster 2.7L 2001 - 2004
Porsche 986 Boxster S 3.2L 2001 - 2004 

Porsche 987-1 Boxster 2.7L 2005 - 2008
Porsche 987-1 Boxster S 3.2L 2005
Porsche 987-1 Boxster S 3.4L 2006 - 2008

Porsche 987-1 Cayman 2.7L 2005 - 2008 
Porsche 987-1 Cayman S 3.4L 2006 - 2008

Porsche 996-1 Carrera 3.4L 2001
Porsche 996-1 Carrera 4 3.4L 2001

Porsche 996-2 Carrera 3.6L 2002 - 2004
Porsche 996-2 Carrera 4 3.6L 2002 - 2004
Porsche 996-2 Carrera 4S 3.6L 2002 - 2005 
Porsche 996-2 Targa 3.6L 2002 - 2005

Porsche 997-1 Carrera 3.6L 2005 - 2008
Porsche 997-1 Carrera S 3.8L  2005 - 2008
Porsche 997-1 Carrera 4 3.6L 2006 - 2008
Porsche 997-1 Carrera 4S 3.8L 2006 - 2008
Porsche 997-1 Targa 4 3.6L 2007 - 2008
Porsche 997-1 Targa 4S 3.8L 2007 - 2008

Diagram ref. 17  

NOTE: For the 2001 model year, Porsche replaced the intermediate shaft's roller-type (duplex) chain with a tooth-type chain. This listing is for the later tooth-type chain and is not compatible with earlier engines equipped with the roller-type chain.

While unlikely, it's possible that an earlier engine may have been rebuilt and upgraded to use the newer chain design. For this reason, Design 911 strongly recommends confirming which type of chain your engine uses before placing an order. To assist with identification, our product images include a helpful comparison between the roller-type (duplex) chain and the tooth-type chain.

Related reference numbers
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99610517158

The product you are viewing cross references to these numbers

Timing chain adjuster, with green seal.

Fits:
Porsche 987 Boxster MKI 2005-08
Porsche 987 Cayman MKI 2005-08
Porsche 997 Carrera MKI 2005-08

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

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99610518602

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Timing chain guide - side. 

Sold individually; x2 required per engine. 

Fits:

Porsche 987-2 Boxster / S 2009-12
Porsche 987-2 Cayman / S 2009-12

Porsche 981 Boxster / S 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981 Cayman / S 2014-16
Porsche 981 Cayman GT4 2016

Porsche 718 (982) Boxster 2017>> 
Porsche 718 (982) Boxster Spyder 2019>> - Excludes RS
Porsche 718 (982) Cayman 2017>>
Porsche 718 (982) Cayman GT4 2019>> - Excludes RS

Porsche 997-2 Carrera 2009-12
Porsche 997-2 Turbo 2010-13 - Excludes GT2 RS

Porsche 991 Carrera 2012-19
Porsche 991 Turbo / GT2 RS 2014-20

Porsche 992-1 Carrera 2019-24
Porsche 992-2 Carrera 3.0L 2024>> - Excludes GTS Models With E-Turbo* 
Porsche 992-1 Turbo 2020>>

Diagram ref. 9. 

*NOTE: This guide is only compatible with the 992-2 Carrera 3.0L. It is not suitable for hybrid models, including the GTS, which features Porsche's E-Turbo technology. A different guide is required for these models.

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0PB109514A

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Timing Chain Guide Rail.

Fits:
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman / Cayman S 2005-08
Porsche 996 C2/C4/C4S 3.6L 2002-05
Porsche 997 3.6L / 3.8L 2005-08 COUPE / CABRIO

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

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99610516804

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Timing chain guide rail. Sold each.

Fits:
Porsche 987.2 Boxster
Porsche 981 Boxster Spyder 2012 to 2016
Porsche 987.2 Cayman
Porsche 981 Cayman GT4 - 2016
Porsche 718 Cayman GT4 RS - 2022 Onwards
Porsche 997.2 Carrera / Carrera 4 - 2009 to 2012
Porsche 997.2 Carrera S / Carrera 4S - 2009 to 2012
Porsche 991 turbo - 2012 to 2018
Porsche 991 GT3 - 2012 to 2018
Porsche 992 GT3 - 2019 Onwards

Replaces OE numbers - 9A110515502, 9A110515503 and 9A110515504

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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0PB109509A

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