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Porsche > 928 (1978-1995) > 928S 4.7L 1981-83 > Engine Electrical >

Wiring Harness / Cables

Wiring Harness / Cables

DISPLAYING 1 to 2 (of 2 products)
Clamp 25x15 Air Valve and Engine Wiring Loom. Porsche 928 / 997.2 - 99951112401, 99951112402
2
Clamp 25x15 Air Valve and Engine Wiring Loom. Porsche 928 / 997.2
Special Order item
99951112401
Product Information
Product Information

Clamp 25/15 – Electric Air Valve & Wiring Loom Clamp 

High-quality 25/15 clamp designed for Porsche 928 models and 997.2 models equipped with the X51 engine upgrade kit.

This clamp is used for mounting the electric air valve on the Porsche 928 and securing the engine wiring loom on the Porsche 997.2 X51, ensuring stable positioning and correct routing of critical components within the engine bay.

Fits:

  • 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 928 4.5L 1978-82
  • Porsche 928S 4.7L 1981-83
  • Porsche 928S2 4.7L 1984-86

Diagram ref no 37B

Manufactured to OEM specifications, this clamp offers precise fitment, durability, and resistance to heat and vibration. Supplied individually, it is ideal for maintenance, repair, or restoration of Porsche intake and electrical systems.

Key Features

• Clamp size 25/15
• Suitable for Porsche 928 and Porsche 997.2 (X51 engine upgrade)
• Part number 99951112401
• Used for electric air valve mounting and wiring loom securing
• Ensures stable mounting and correct routing
• Prevents vibration-related movement and wear
• Durable and corrosion-resistant construction
• OEM-style fit and performance
• Sold individually

Function and Purpose

This clamp is designed to secure components across different systems.

It helps to:
• Mount the electric air valve securely (928)
• Maintain correct routing of engine wiring looms (997.2 X51)
• Prevent vibration-related wear or movement
• Protect sensitive electrical and intake components
• Ensure long-term system reliability

Why Replace Clamps

Clamps can degrade over time due to heat and environmental exposure.

Common issues include:
• Loss of clamping strength
• Corrosion or fatigue
• Component movement or misalignment
• Increased risk of wear or system faults

Replacing worn clamps ensures secure installation and protects critical systems.



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Related, superseded, cross reference or alternative numbers for comparison.

99951112401
99951112401
99951112402

The product you are viewing cross references to these numbers
Clamp 25x15 Air Valve and Engine Wiring Loom. Porsche 928 / 997.2 - 99951112401, 99951112402 - PRSGU12
2
Clamp 25x15 Air Valve and Engine Wiring Loom. Porsche 928 / 997.2
Special Order item
99951112401/1
Product Information
Product Information

Clamp 25/15 – Electric Air Valve & Wiring Loom Clamp 

High-quality 25/15 clamp designed for Porsche 928 models and 997.2 models equipped with the X51 engine upgrade kit.

This clamp is used for mounting the electric air valve on the Porsche 928 and securing the engine wiring loom on the Porsche 997.2 X51, ensuring stable positioning and correct routing of critical components within the engine bay.

Fits:

  • 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 928 4.5L 1978-82
  • Porsche 928S 4.7L 1981-83
  • Porsche 928S2 4.7L 1984-86

Diagram ref no 37B

Manufactured to OEM specifications, this clamp offers precise fitment, durability, and resistance to heat and vibration. Supplied individually, it is ideal for maintenance, repair, or restoration of Porsche intake and electrical systems.

Key Features

• Clamp size 25/15
• Suitable for Porsche 928 and Porsche 997.2 (X51 engine upgrade)
• Part number 99951112401
• Used for electric air valve mounting and wiring loom securing
• Ensures stable mounting and correct routing
• Prevents vibration-related movement and wear
• Durable and corrosion-resistant construction
• OEM-style fit and performance
• Sold individually

Function and Purpose

This clamp is designed to secure components across different systems.

It helps to:
• Mount the electric air valve securely (928)
• Maintain correct routing of engine wiring looms (997.2 X51)
• Prevent vibration-related wear or movement
• Protect sensitive electrical and intake components
• Ensure long-term system reliability

Why Replace Clamps

Clamps can degrade over time due to heat and environmental exposure.

Common issues include:
• Loss of clamping strength
• Corrosion or fatigue
• Component movement or misalignment
• Increased risk of wear or system faults

Replacing worn clamps ensures secure installation and protects critical systems.



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

99951112401
99951112401
99951112402

The product you are viewing cross references to these numbers
DISPLAYING 1 to 2 (of 2 products)
About Wiring Harness / Cables

Wiring Harnesses & Cables – Reliable Electrical Connectivity for Porsche Vehicles

Wiring harnesses and cables are the lifeblood of your Porsche’s electrical system, transmitting power and data between critical components such as sensors, lights, ignition systems, and control modules. A healthy wiring system ensures reliable communication across all vehicle systems — from the engine to interior electronics — maintaining performance, safety, and comfort.

At Design911, we supply an extensive range of genuine and high-quality wiring harnesses and cables for various Porsche models, including 911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each harness and cable is precision-engineered for durability, exact fitment, and optimal electrical conductivity to keep your Porsche performing at its best.

What Do Wiring Harnesses and Cables Do?

Wiring harnesses and cables connect all electrical and electronic systems within your Porsche, ensuring dependable power distribution and signal transmission. Their key roles include:

  • Delivering electrical power from the battery and alternator to essential systems.
  • Transmitting data signals between the ECU, sensors, and modules.
  • Supporting lighting, ignition, and climate control circuits.
  • Reducing wiring complexity by grouping circuits into one protected unit.

A well-maintained harness ensures stable voltage delivery, preventing power losses, short circuits, and intermittent faults.

Why Do Wiring Harnesses and Cables Fail?

Due to exposure to vibration, heat, and environmental elements, wiring and cables naturally degrade over time. Common causes of failure include:

  • Corrosion or oxidation on terminals and connectors.
  • Broken or frayed wires from movement or mechanical stress.
  • Insulation cracking due to heat and age.
  • Rodent damage or external wear from abrasion.
  • Water ingress leading to short circuits and poor conductivity.

Symptoms of wiring failure can include intermittent electrical faults, warning lights, non-functioning accessories, or complete electrical system failure.

Why Replace Damaged Wiring Harnesses or Cables?

Replacing worn or damaged wiring ensures electrical reliability, safety, and proper communication between all systems. Faulty wiring can lead to voltage drops, malfunctions, or even electrical fires if left unchecked.

Benefits of replacement include:

  • Restored electrical performance and reliability.
  • Prevention of intermittent faults and short circuits.
  • Improved signal integrity for sensors and control units.
  • Long-lasting durability with manufacturer-quality construction.

All wiring harnesses and cables in our range are built using high-quality copper conductors, heat-resistant sheathing, and precision connectors, ensuring exceptional reliability under all conditions.

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