Wiring Harness / Cables
For Left Hand Drive Cars ONLY!
Fits:
Porsche 987.1 Boxster MKI 2005>>2008
Porsche 987.2 Boxster MKII 2009>>2012
Porsche 987.1 Cayman MKI 2006>>2008
Porsche 987.2 Cayman MKII 2009>>2012
Porsche 997.1 Carrera MKI 2005>>2008
Porsche 997.2 Carrera MKII 2009>>2012
Porsche 997.1 Turbo / GT2 MKI 2007>>2009
Porsche 997.2 Turbo / GT2 RS MKII 2010>>2013
Porsche 997 GT3 MKI / MKII 2007>>2011
Cars With Option Codes:
098 - Left-Hand Drive Version
Diagram Ref No 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99761290801
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- 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 GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
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12 Month Warranty
Worldwide Delivery
This Porsche Battery Ground Cable, RHD is a genuine OEM electrical cable designed specifically for right-hand drive models only. This heavy-duty cable connects the battery’s negative terminal to the chassis, providing the essential earth/ground connection that keeps your Porsche’s electrical system stable and reliable.
Fits:
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 997 Carrera 2 3.6L 2005-08
- Porsche 997 Carrera 2S 3.8L 2005-08
- Porsche 997 Carrera 4 3.6L 2005-08
- Porsche 997 Carrera 4S 3.8L 2005-08
- Porsche 997 TURBO 2007-09
- Porsche 997 GT3 2007-09
- Porsche 997 GT2 2007-09
- 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 GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
What This Product Does:
The battery ground cable is a heavy-duty electrical cable that connects the negative terminal of the battery to the chassis/engine ground. On right-hand drive (RHD) Porsche models, it is designed with the correct length and routing for proper fitment.
Functions:
- Provides the primary earth/ground connection for the vehicle’s electrical system.
- Ensures stable current flow between the battery, starter, alternator, and electronic modules.
- Helps deliver consistent starting power and prevents voltage drops.
- Protects sensitive electronic components by maintaining proper grounding.
Symptoms Of A Faulty Battery Ground Cable:
- Hard starting or intermittent no-start condition.
- Electrical faults such as flickering lights or warning messages.
- Battery not charging properly due to poor grounding.
- Slow cranking from the starter motor.
- Visible corrosion or fraying on the cable or terminals.
The ground cable is a critical link in the electrical system. A poor connection can cause starting issues, electrical malfunctions, or even damage to control modules.
Replacing it with a genuine OEM cable ensures:
- Correct fitment for RHD (Right Hand Drive) Porsche models.
- Reliable starting and charging performance.
- Long-term corrosion resistance and durability.
- Protection for sensitive electronics.
Diagram Ref No 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99761109100
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- 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 GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Shop Securely
12 Month Warranty
Worldwide Delivery
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.
