Relay 109 (A4)(B4)(A3) - 1J0906381A

Relay 109 is the main power supply relay for A3/B4, and A4 TDIs with the ALH engine. When it fails the engine will crank but not start. Sometimes they fail intermittently.

Most TDI owners like to keep a spare in their glove box.

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Vehicle Applications
Manufacturer Data

Volkswagen

Golf TDI MkIV (A4 chassis) w/ ALH Engine (1999-2003)
Golf TDI MkIV (A4 chassis) w/ BEW Engine (2004-2006)
Jetta TDI MkIII (A3 chassis) w/ AHU Engine (1997-1999)
Jetta TDI MkIV (A4 chassis) w/ ALH Engine (1999-2003)
Jetta TDI MkIV (A4 chassis) w/ BEW Engine (2004-2005)
Jetta Wagon TDI (A4 chassis) w/ ALH Engine (2002-2003)
Jetta Wagon TDI (A4 chassis) w/ BEW Engine (2004-2006)
New Beetle TDI (A4 chassis) w/ ALH Engine (1998-2003)
New Beetle TDI (A4 chassis) w/ BEW Engine (2004-2006)
Passat TDI (B4 chassis) w/ AHU/1Z Engine (1996-1997)

Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business in the automotive aftermarket. Since 1995 Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles, with wholesale activities in more than 120 countries across all continents.