Gates T42139 Engine Timing Belt Idler Pulley - Upper
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Gates
 Timing Belt Pulley

Gates T42139 Engine Timing Belt Idler Pulley - Upper

Brand Gates T42139
Position Upper
Material Steel
Inside Diameter 9
Width 34
Outside Diameter 28.5
Flanged End No
Contact Surface Smooth/backside
Contents Pulley, bolt
OE Comparison Rating Oe exact
Product line Timing Belt Pulley
Fits Audi and Volkswagen · 17 vehicles

OE exact replacement. Matches original fit and function for straightforward installation.

Steel construction. Built for dependable strength in the timing belt system.

Smooth contact surface. Helps the belt run quietly and consistently.

Cross-references Gates T42139 and 03L109244C for the same application. See all 2.

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Gates T42139 Timing Belt Idler Pulley

The Gates T42139 is an engine timing belt idler pulley built for precise belt routing in compatible Volkswagen and Audi applications. It uses a steel construction with a smooth backside contact surface and OE Exact comparison rating for a direct-fit replacement approach.

Gates PowerGrip idler pulleys are offered as fixed idlers or as replacements for a tensioner bracket, with designs that may use metallic or plastic construction and smooth or grooved contact surfaces. This Gates timing belt pulley line is focused on accurate belt tracking and OE-style fitment for service work on the timing system.

  • Steel idler pulley with smooth/backside contact surface
  • OE Exact comparison rating for direct replacement fit
  • Includes pulley and bolt
  • Inside diameter: 9 mm
  • Outside diameter: 28.5 mm
  • Width: 34 mm
  • Flanged end: No

Fitment Details

  • Fits 2013-2014 Volkswagen Beetle, upper; compatible with interference engines.
  • Fits 2010-2014 Volkswagen Golf, upper; compatible with interference engines.
  • Fits 2009-2014 Volkswagen Jetta, upper; compatible with interference engines.
  • Fits 2010-2013 Audi A3, upper; compatible with interference engines.

Use the Gates T42139 when replacing a worn or noisy upper timing belt idler pulley on Volkswagen Beetle, Golf, Jetta, or Audi A3 applications listed above. This part cross-references 03L109244C for the same application.

Common Replacement Reasons

  • Timing belt noise from a worn pulley bearing
  • Belt tracking issues at the upper idler location
  • Visible wear, rough rotation, or pulley surface damage
  • Service replacement during timing belt maintenance on interference engines

Installation Notes

Verify engine code and vehicle fitment before installation, especially on interference-engine applications. Inspect the timing belt, related rollers, and tensioning components during service, and follow the manufacturer’s timing procedure and torque specifications for the vehicle.

Quality Assurance

Gates timing components are engineered for OE-style service replacement, and this pulley carries an OE Exact comparison rating for application matching.

Related reading

This part fits 17 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersFuel TypePositionNotes
2014VolkswagenBeetle2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2014VolkswagenGolf2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2014VolkswagenJetta2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2013AudiA32.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2013VolkswagenBeetle2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2013VolkswagenGolf2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2013VolkswagenJetta2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2012AudiA32.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2012VolkswagenGolf2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2012VolkswagenJetta2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2011AudiA32.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2011VolkswagenGolf2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2011VolkswagenJetta2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2010AudiA32.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2010VolkswagenGolf2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2010VolkswagenJetta2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
2009VolkswagenJetta2.0LL4DIESELUpperCompatible with interference engines.; Timing Belt Pulley
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Gates — T4213903L109244C