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Wiring Harness / Cables

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DISPLAYING 1 to 11 (of 11 products)
90161203710/1
Product Information
Product Information
Alternator wiring harness loom for Motorola unit.

Fits:
Porsche 901 / 911 - 1964 to 1965

For Motorola alternator only

Harness from alternator to regulator with rubber terminal boot included. (Motorola)

(Only for 1964 901 and 1965 911)

As original coloured wiring.

Original neoprene terminal sleeves used, (no shrink wrap)

Very high quality flex automotive grade wiring, ISO6722:2002 / DIN72551/6 / EEC directive 2000/53

Gasoline, oil, battery acid, engine coolant resistant.

The high flex sleeving is very resistant to solvents, free of halogen, sulphur and phosphorous.

Special order made to order parts please allow 2 – 4 weeks

Handmade to concourse quality.

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90161203710
901.612.037.10A
90161203710

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90161103121/1
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Starter cable with original style terminals and grommets.

oematch

Fits:
Porsche 911 1965-73



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90161103121
90161103121

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90161289200/1
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2-Pin Cable Connector – SWB Engine Bay Terminal Block 

High-quality 2-pin cable connector terminal block designed for Porsche 911 SWB (short wheelbase) models from 1965 to 1968, used in the engine compartment wiring system.

Based on the original factory design, this connector provides an accurate replacement for aged, cracked, or brittle terminal blocks, restoring reliability and correct electrical connections within the engine bay.

Fits:

  • Porsche 911 1965-1968 2.0L / 912 SWB (F) 

Diagram ref no 8     

Supplied with hardware matching the original wiring harnesses, this connector ensures authentic fitment and seamless integration into classic Porsche electrical systems.

Key Features

• 2-pin cable connector terminal block
• Suitable for Porsche 911 SWB (1965–1968)
• Designed for engine compartment wiring
• OEM-style reproduction based on original design
• Includes correct hardware for installation
• Replaces cracked or damaged terminal blocks
• Ensures reliable electrical connections
• Ideal for restoration and repair work

Function and Purpose

This connector plays a key role in the electrical system.

It helps to:
• Provide secure connection between wiring circuits
• Restore original wiring layout and function
• Prevent electrical faults caused by worn connectors
• Maintain reliable current flow
• Support overall engine bay electrical integrity

Why Replace Terminal Blocks

Original connectors in early Porsche models are prone to deterioration.

Common issues include:
• Cracked or brittle plastic housings
• Loose or corroded terminals
• Intermittent electrical faults
• Reduced reliability in engine bay wiring

Replacing the terminal block ensures safe, stable, and correct electrical operation.



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90161289200
90161289200

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99951107602/1
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Pipe Clamp B20x18 – Multi-Position Clamp 
Sold each

High-quality pipe clamp B20x18 designed for a wide range of securing applications across Porsche 911, 924S, 928, and 914 models.

This versatile clamp is used in multiple locations including air conditioning pipes, wiring looms, power steering lines, clutch cables, and heating system components, making it an essential part for maintaining correct routing and system integrity throughout the vehicle.

Fits:

  • Porsche 911 1965-1968 2.0L / 912 SWB (F)
  • Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
  • Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
  • Porsche 924S 2.5L 1986-87
  • Porsche 924S 2.5L 1988
  • Porsche 928S4 5.0L 1987-92
  • Porsche 928GT 5.0L 1989-91
  • Porsche 928GTS 5.4L 1992-95
  • Porsche 914 (1970-1976)

Manufactured to OEM specifications, this clamp ensures secure fitment, durability, and resistance to corrosion. Supplied individually, it allows flexible replacement for maintenance, repair, or restoration projects.

Key Features

• Pipe clamp size B20x18
• Suitable for Porsche 911, 924S, 928, and 914
• Part number 99951107602
• Multi-use: AC pipes, wiring looms, steering, clutch, heating
• Ensures secure mounting and routing
• Durable and corrosion-resistant construction
• OEM-style fit and performance
• Sold individually

Function and Purpose

This clamp is designed to secure various components across the vehicle.

It helps to:
• Hold pipes, hoses, and cables firmly in place
• Maintain correct routing and alignment
• Prevent vibration-related wear and damage
• Protect sensitive components such as wiring looms
• Support long-term system reliability

Why Replace Pipe Clamps

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

Common issues include:
• Loss of clamping strength
• Corrosion or fatigue
• Movement of pipes or cables
• Increased risk of wear or failure

Replacing worn clamps ensures proper securing and protects system components.



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99951107602
99951107602

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91161205000/1
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Complete ignition harness for a 3 pin CD1/HK2 box.
Includes all connector boots, PVC sheathing, high grade automotive wire, flat braided ground cable and contacts per the original specifications. Compatible with cars up to 1973.


Fits:
Porsche 911 1965-73
Porsche 914/6 1971-75



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91161205000
91161205000

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911612SCPUMP
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SC Style Front Fuel Pump Loom Upgrade – Improved Fuel Pump Wiring Solution

High-quality SC-style front fuel pump loom upgrade, designed to improve the reliability, safety, and performance of the fuel delivery system on classic Porsche 911 models.

Fits:

  • Porsche 911 1965-1968 2.0L / 912 SWB (F)
  • Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
  • Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

This upgrade replicates the improved wiring layout found on later 911 SC models, relocating and optimising the fuel pump electrical supply to ensure more consistent voltage delivery and safer operation.

The loom can be integrated into the original ignition circuit, allowing the fuel pump to operate correctly in line with ignition status, enhancing both safety and functionality.

Key Features

• SC-style front fuel pump wiring upgrade
• Improves electrical supply to fuel pump
• Can be wired into original ignition circuit
• Enhances reliability and fuel delivery consistency
• Reduces load on original wiring
• Ideal for classic 911 upgrades and restorations
• High-quality wiring and connectors
• Designed for straightforward installation

Function and Purpose

This loom upgrade improves the performance of the fuel pump circuit.

It helps to:
• Deliver consistent voltage to the fuel pump
• Reduce strain on aging factory wiring
• Improve fuel pump efficiency and reliability
• Enable ignition-controlled pump operation
• Enhance overall system safety

Why Upgrade to SC-Style Fuel Pump Wiring

Early Porsche 911 wiring setups can suffer from voltage drop and reliability issues.

Benefits of this upgrade include:
• Improved fuel pump performance
• More stable electrical supply
• Reduced risk of wiring failure
• Enhanced safety through ignition control
• Modernised system while retaining OEM logic

This makes it a highly recommended upgrade for both restored and regularly driven classic 911s.

90261203700/1
Product Information
Product Information
Generator harness 420W.

Fits:
Porsche 912 (1965-68)

Made in Canada.

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90261203700
90261203700

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61610938100/1
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Generator wire lead rubber boot, 2 required per car. Sold each.

Fits:
Porsche 356 1950-65
Porsche 912 1965-69

Diagram ref no 4

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61610938100
61610938100

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90161211000/1
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Ground Strap Alternator and Intercooler.

Fits:
Porsche 911 - 1965 to 1973 - (alternator)

Porsche 911 turbo - 1987 to 1989  (intercooler)
Porsche 914 - 1970 to 1976

Click 'Zoom in' for large parts diagram.
Diagram ref no 18 or 17



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90161211000
90161211000

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90160905305/1
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Product Information
Relay wiring kit.
This kit containers the wires located on the engine relay panel equipped with the Bosch or Beru resistors.

oematch

Fits:
Porsche 911 1965-68

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90160905305
90160905305

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90161200101Z
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Wire harness front luggage compartment.

Fits:
Porsche 911 and 912 1966-1968 (Zuffenhausen) 
* this is the taped version, only used for car's build at Zuffenhausen

Complete front harness from fuse box to front, headlights, horns, turn signal, washer pump, fog lights. Each wire at the right length with original colour coded wiring. H4 connectors included.

New 4 pole fuel connectors included.

•  As original coloured wiring.
•  Original neoprene terminal sleeves used, (no shrink tube!)
•  Very high quality flex automotive grade wiring, ISO6722:2002 / DIN72551/6 / EEC directive 2000/53 Gasoline, oil, battery acid, engine coolant resistant.
•  High flex sleeving ,very resistant to solvents and free of halogen, sulphur and phosphorous.
•  Handmade in Holland, concourse quality.

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

90161200101Z
90161200101

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DISPLAYING 1 to 11 (of 11 products)
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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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