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Vacuum Pump

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DISPLAYING 1 to 3 (of 3 products)
Special Order item
9P1129487
Product Information
Product Information
Vacuum Line Connector. 

Fits:
Porsche 911 3.2 Carrera - 1984 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 996 - 1997 to 2005
Porsche 997 - 2005 to 2012
Porsche 991.1 - 2012 to 2016
Porsche 986 Boxster - 1997 to 2004
Porsche 987 Boxster / Cayman - 2005 to 2012

Click 'Zoom in' for large parts diagram.
Diagram ref no 2 and 13



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Related, superseded, cross reference or alternative numbers for comparison.

9P1129487
92857471707
9P1129487
92857471705
92857471703
92857471706

The product you are viewing cross references to these numbers
9P1129487/1
Product Information
Product Information

OE Match vacuum pipe connector for selected Porsche 911 generations, Boxster 986 and Boxster / Cayman 987 applications. Intended for repairs to the connecting sections of vacuum pipework.

Fits

Porsche 911 3.2 Carrera - 1984 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 996 - 1997 to 2005
Porsche 997 - 2005 to 2012 correct
Porsche 991.1 - 2012 to 2016
Porsche 986 Boxster - 1997 to 2004
Porsche 987 Boxster / Cayman - 2005 to 2012

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

Diagram ref no 2 & 13

What This Product Does

The connector joins vacuum pipework at the relevant connection point. Its role is to maintain the connection rather than generate vacuum or operate an actuator.

Functions

  • Connects sections of vacuum pipework.
  • Provides a replacement for a damaged or leaking connection.
  • Supports continuity of the connected vacuum circuit.

Technical Details

  • Brand: OE Match.
  • 9P1129487 is identified as a distributing piece and moulded hose in the 911 Carrera diagrams.
  • 911 Carrera L-Jetronic II applications: 930.20/21/26, 1984–86; 930.20/25/26, 1987–89. Air-injection diagrams also identify 930.26, including AUS, CH and S applications for 1984–86.
  • 92857471705 is identified as a protective tube in the supplied 964 and 993 diagrams.
  • 964 diagram applications: M64.01/02/03, 1989–94; 964 Turbo M30.69 and M64.50, 1991–94.
  • 993 Carrera/4 diagram applications: M64.05/06/07/08, 1994–98. Diagram quantities vary by application and position; they do not establish the quantity supplied.

Symptoms of Fault

  • Visible cracks or deterioration around the connection.
  • Hissing near the vacuum pipe joint.
  • Leakage identified during vacuum testing.
  • Irregular operation of the connected vacuum-controlled component.
  • Unstable idle where the leaking circuit affects the intake system.

Why Replacement Matters

A leaking connection can interrupt vacuum supply to the attached circuit. Renewing a confirmed faulty connector addresses that leak point; adjoining hoses and fittings should also be inspected for deterioration. OE Match develops replacement components around Porsche applications, using original references and application information to guide component selection.

FAQs

Does this replace a vacuum pump or actuator?
No. It is a pipework connector, not a pump, valve or actuator assembly.

Should nearby hoses be inspected?
Yes. Hardened or split hoses can leave the circuit leaking after the connector has been renewed.

Is the same connector used throughout every listed vehicle?
The installation position depends on the application. Compare the original connection and relevant diagram before fitting.



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

9P1129487
92857471707
9P1129487
92857471705
92857471703
92857471706

The product you are viewing cross references to these numbers
Special Order item
99923904040
Product Information
Product Information
Vacuum Line Connector. 

Fits:
Porsche 996 - 1997 to 2005
Porsche 997 - 2005 to 2012
Porsche 991.1 - 2012 to 2016
Porsche 986 Boxster - 1997 to 2004
Porsche 987 Boxster / Cayman - 2005 to 2012

Click 'Zoom in' for large parts diagram.
Diagram ref no 19



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

99923904040
99923904040

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
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About Vacuum Pump

Engine Vacuum Pumps, Gaskets, Pipes & Parts – Reliable Vacuum Pressure for Porsche Engines

The engine vacuum pump and its related components — including gaskets, pipes, and fittings — play a vital role in your Porsche’s braking, emissions, and engine control systems. By generating and maintaining vacuum pressure, the system supports crucial functions such as brake servo assistance, turbocharger operation, and crankcase ventilation.

At Design911, we supply a wide range of vacuum pumps, gaskets, pipes, and parts designed for optimal performance across Porsche models. Manufactured using high-grade materials and advanced sealing technology, our components ensure reliable vacuum pressure, leak-free operation, and long-term durability — essential for maintaining your Porsche’s braking response and engine efficiency.

Whether you’re servicing a classic air-cooled 911 or maintaining a modern turbocharged model, our vacuum components provide a perfect fit and superior reliability under all driving conditions.

What Do Engine Vacuum Pumps & Components Do?

The vacuum pump creates negative pressure within the engine system to assist various mechanical and electronic functions.

Core Functions:

  • Generates vacuum pressure for the brake servo, ensuring consistent braking assistance.
  • Supports turbocharger systems in controlling boost pressure.
  • Aids crankcase ventilation and emissions control systems.
  • Drives auxiliary systems that depend on vacuum regulation.
  • Ensures stable engine operation during idle and high load.

The system’s integrity relies on every component — from the pump to the smallest pipe fitting — working seamlessly to maintain consistent vacuum pressure.

Why Do Vacuum Pumps & Components Fail?

Engine vacuum systems operate under heat, vibration, and constant pressure changes, which can lead to degradation or leakage over time.

Common Causes of Failure Include:

  • Worn seals or gaskets causing vacuum leaks.
  • Cracked or brittle hoses and fittings due to heat exposure.
  • Pump wear from oil contamination or lack of lubrication.
  • Corrosion or deformation of pump housings.
  • Blocked or split vacuum lines reducing system efficiency.

Symptoms of failure include hard brake pedal feel, loss of braking assistance, uneven idle, poor boost control, or oil leaks around the pump housing. Addressing these early prevents performance loss and safety issues.

Why Replace Vacuum Pump Components?

Replacing worn or leaking vacuum pumps and related components ensures safe braking, stable idling, and optimal engine performance. Our precision-engineered replacements are built for high reliability and compatibility across Porsche models.

Key Benefits:

  • Restores consistent vacuum pressure and braking performance.
  • Prevents oil leaks and pressure loss.
  • Constructed from corrosion- and heat-resistant materials.
  • Ensures long-term reliability under high engine loads.
  • Direct-fit compatibility with a wide range of Porsche vehicles.
  • Ideal for regular maintenance, rebuilds, or performance servicing.

Investing in quality vacuum system components protects both safety and engine efficiency — a must for high-performance Porsche engines.

Highlights:

  • Precision-engineered vacuum pumps, gaskets, and pipes for
  • Porsche models. Restores proper vacuum function for braking and engine systems.
  • Durable, leak-resistant materials for long-term reliability.
  • Perfect fit for Porsche 911, Cayman, Boxster, Panamera and more.
  • Essential for safe braking, emissions control, and performance tuning.
  • Ideal for rebuilds, repairs, and preventive maintenance.

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