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Your Vehicle  //  Porsche  //  964 (911) (1989-1994)  //  964 (911) C4 1989-93
Porsche964 (911) (1989-1994)964 (911) C4 1989-93Engine Rebuild PartsFuel System PartsPressure Valves / Sensors / Dampers / Regulators

Fuel diaphragm damper. Porsche 928 1987-95 › 93011060231

Fuel diaphragm damper. Porsche 928 1987-95 - 93011060201, 93011060231
4
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93011060231
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Fuel Diaphragm Damper
The Genuine Porsche Fuel Diaphragm Damper (Part Numbers: 93011060201 / 93011060231) is an original equipment fuel system component designed for the Porsche 928 S4, GT and GTS models manufactured between 1987 and 1995. This fuel pressure damper forms part of the engine's fuel injection system, helping absorb pressure pulsations and maintain smooth, consistent fuel delivery to the injectors.

Fits:
Porsche 928 S4 5.0L  1987–1992
Porsche 928 GT 5.0L  1989–1991
Porsche 928 GTS 5.4L 1992–1995

Diagram ref no 3.

Using an internal diaphragm mechanism, the damper reduces fuel pressure fluctuations generated during fuel system operation, supporting stable engine running, smooth acceleration and reliable performance.

Manufactured to Porsche's original specifications, this genuine replacement component provides precise fitment and dependable operation, making it ideal for fuel system repairs, maintenance and restoration.

What Does This Part Do? – Functions
  • Pressure Stabilisation: Reduces fuel pressure pulsations within the injection system
  • Smooth Fuel Delivery: Helps maintain consistent fuel flow to the injectors.
  • Engine Performance: Supports smooth idling and acceleration.
  • Fuel System Protection: Dampens pressure fluctuations within the fuel circuit.
  • Original Fitment: Maintains factory-correct fuel system specifications.

Why Replace This Part?
Over time, the internal diaphragm can deteriorate due to ageing, continuous fuel pressure and exposure to fuel. A faulty damper may cause excessive fuel pressure fluctuations, rough idling, inconsistent engine performance or fuel leakage.

Replacing a worn or damaged damper with a genuine Porsche component helps restore effective pressure damping, reliable fuel delivery and the original performance of the fuel injection system.

When to Replace This Part?
  • Fuel Pressure Fluctuations: Excessive pressure pulsations detected during testing.
  • Rough Idling: Uneven engine running associated with fuel pressure instability.
  • Poor Acceleration: Hesitation or inconsistent engine response.
  • Fuel Leaks: Visible leakage or fuel odour around the damper.
  • Fuel System Repairs: During maintenance when the original damper is found defective.

Where Does It Fit on the Car?
Location: Engine compartment – fuel injection system.

The fuel diaphragm damper is fitted within the engine's fuel delivery system, connected to the fuel rail assembly towards the rear of the engine. It works alongside the fuel pressure regulator, fuel rails and injectors to reduce pressure pulsations and support consistent fuel delivery.


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

93011060231
93011060201
93011060231

The product you are viewing cross references to these numbers
Related products
Fuel Pressure Regulator. Porsche 928 / 964 - 92811019804, 0280160297, 92811019825
4
Fuel Pressure Regulator. Porsche 928 / 964
Special Order item
92811019825
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Product Information
Fuel Pressure Regulator. Porsche 928 / 964

Fits:
Porsche 928 S4 / GT 1988-1991
Porsche 928 GTS 1992-95
Porsche 964 C2 / C4 / RS 1989-94

Click 'Zoom in' for large parts diagram.
Diagram ref no. 4

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

92811019825
92811019804
0280160297
92811019825

The product you are viewing cross references to these numbers
Mounting bracket fuel pressure regulator. Porsche 911 / 964 / 993 - AMS9050049
2
Mounting bracket fuel pressure regulator. Porsche 911 / 964 / 993
99311050049/1
Product Information
Product Information
Mounting bracket fuel pressure regulator. 

Fits
Porsche 911 - 1974 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998

Our newly released fuel pressure regulator brackets mount to the Adapt Motorsport fuel pressure regulators to the engine breather cover bolts on top of the classic aircooled engines.  
The same as Porsche do for the 964.  

Manufactured from CNC machine aluminium and anodised in a dark silver colour, they really add a nice look to any classic Porsche engine bay.

Please Note
Only the regulator brackets and fasteners are included in the kit, the regulator is shown for reference purposes only and not included.  

We have a range of different regulators that can be ordered.

Fuel pressure regulator. Porsche 964 / 928 / 944 - 92811019825, 92811019804, 92811019803, 0 280 160 297, 0280160297 - AMS9050006
3
Fuel pressure regulator. Porsche 964 / 928 / 944
92811019825/2
Product Information
Product Information
Fuel pressure regulator. 

Fits:

Porsche 964 Carrera 2 - 1989 to 1994
Porsche 964 Carrera 4 - 1989 to 1994
Porsche 964 RS - 1991 to 1993
Porsche 928 S4 / GTS - 07/1988 to 1994

Replaces Bosch 0280160297, and Porsche 92811019825 & 92811019804 & 92811019803 - 3.8 Bar (engine running, no vacuum line connected)

A direct replacement for the  OEM Bosch fuel pressure regulators used in many Porsche, Volvo, Mercedes and other makes.

Our fuel pressure regulator uses the latest Bosch regulators and by default is shipped with a 3.8 bar regulator to be a direct replacement.  This simple and elegant design uses steel O-Ring boss sealing adapters to the manifold with multiple options for hose connections.

Easy to replace regulator with Bosch OEM reliability

3 outlet ports for flexible hose, fitting, gauge, sensor port options  

The Bosch regulator is rated to a maximum fuel flow of 200lpm.  

Kit Includes:

  • Porsche 964 / late 928 OEM fitting kit
  • Fuel pressure regulator body x 1
  • Bosch Fuel pressure regulator x 1
  • Option for adjustable fuel pressure regulator instead of fixed regulator
  • Custom adapter fittings to fit to Porsche OEM hose ends x 3
  • ORB Plug x 1

* Mounting bracket not included.  Fits to factory regulator bracket or our bracket if required for additional cost



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

92811019825
92811019825
92811019804
92811019803
0 280 160 297
0280160297

The product you are viewing cross references to these numbers
Fuel pressure control unit with AN-6 hose fittings. Porsche 911 - 1616002908, PM-O404-0
2
Fuel pressure control unit with AN-6 hose fittings. Porsche 911
PM-O404-0
Product Information
Product Information
Fuel pressure control unit with AN-6 hose fittings. 



Fits:
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998

Fuel Pressure Control Unit, AN-6 Hose Fittings

A PMO exclusive, this pressure control unit eliminates the need to change fuel pumps when converting MFI and CIS Injected Systems and indicates the fuel pressure the system is running at. The unit is connected to the feed and return circuits and the fuel pressure is controlled by restricting the flow back to the tank. The flow back to the tank is controlled by the adjustable pressure valve.

This unit is preset with a running pressure of 3.0 to 4.0lbs of fuel pressure