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T4,G3,G4 Fuel Pump Relay - 1997-03 (Position 109)

Replacement Code 109 relay used across a wide range of VW models. This 4 pin 12 volt relay is commonly linked with ECU power supply and fuel pump operation, helping provide the correct electrical feed needed for reliable starting and smooth engine running.

A failing relay can cause intermittent non-starting, cutting out, stalling, poor fuel pump operation or loss of ECU power. Because relay faults can often appear randomly, replacing a weak or old relay is a sensible repair when diagnosing electrical starting or running issues.

This relay can also be used in other vehicle circuits depending on model, including terminal 30, gear shift lever, sunroof, tailgate and licence plate light functions. Always check the relay number, pin layout and application before fitting.

Specifications

  • Relay Code: 109
  • Voltage: 12V
  • Pins: 4
  • Rated Current: 15A
  • Rated Power: 180W
  • Relay Type: Normally open contact
  • Main Functions: ECU / fuel pump / terminal 30 supply

Vehicle Fitment

Watercooled VW

  • VW New Beetle 1998-2010, petrol and diesel models
  • VW Bora 1998-2005, petrol and diesel models
  • VW Golf Mk3 1992-1998, selected petrol and diesel models
  • VW Golf Mk4 1997-2006, petrol and diesel models
  • VW Golf Mk4 Cabriolet 1998-2002, 1.9 diesel
  • VW Corrado 1992-1995, selected models
  • VW Vento 1992-1998, selected petrol and diesel models
  • VW Passat B3/B4 1988-1997, selected petrol and diesel models
  • VW Polo 6N / 6V / 9N / 6R 1994 onwards, selected petrol, diesel and LPG models
  • VW Lupo 1998-2005, selected diesel models
  • VW Fox 2005-2009, 1.4 diesel
  • VW Caddy II 1995-2004, selected diesel models
  • VW T4 Transporter 1995-2003, selected petrol and diesel models
  • VW T5 Transporter 2003-2009, selected petrol and diesel models
  • VW Sharan 1995-2010, selected petrol and diesel models
  • VW Touareg 7L 2003-2010, 2.5 diesel models

Common Fault Symptoms

  • Engine turns over but will not start
  • Engine cuts out while driving
  • Intermittent starting fault
  • Fuel pump not priming
  • ECU power supply fault
  • Random stalling
  • Relay clicking or heat damage

Additional Parts Recommended

  • Fuel pump relay socket inspection
  • Fuel pump fuse check
  • ECU power supply fuse check
  • Diagnostic fault code scan
  • Battery and earth connection inspection

This Part Fits: T4 Transporter, Mk3 Golf, Mk4 Golf, Corrado, Mk3 Polo, T5 Transporter,

Availability: Stock Item

Item Name: Multifunctional Relay

Description: Multifunctional Relay

Product Group: Electric

Group: Central Electrics

Unit of Measure: Each

Manufacturer: JP

Dimensions:

Width: 35mm

Height: 35mm

Depth: 60mm

Volume: 73500mm3

Weight: 0.041kg

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