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Gates T42138 Engine Timing Belt Idler Pulley - LowerOE Quality 60-Day Returns
Part #: T42138

Gates T42138 Engine Timing Belt Idler Pulley - Lower

Timing Belt Pulley, Lower
15 vehicles fit this part
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Timing Belt Pulley, Lower
Fitment: Audi, A4, A4 Quattro, A6, and A6 Quattro
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Gates Timing Belt Idler Pulley T42138

The Gates T42138 timing belt idler pulley is a steel, smooth-backside pulley built for the engine valve train. It is a lower timing belt pulley for select Audi applications, including Audi A4, A4 Quattro, A6, and A6 Quattro models from 2002-2006.

Key Features

  • Steel construction for timing system durability
  • Smooth/backside contact surface for belt routing
  • Flanged end for secure belt tracking
  • Inside diameter: 10
  • Outside diameter: 59
  • Width: 37
  • Contents: pulley only

Product Details

Gates Timing Belt Pulley T42138 is part of the Gates PowerGrip idler pulley line, which includes fixed idlers and replacement pulleys for tensioner bracket applications. This pulley uses a smooth backside contact surface and steel construction to support timing belt routing in the lower position. It cross-references URO 06C109244C for the same application. Fits 2002-2006 Audi A4 Quattro, lower; fits 2002-2005 Audi A4, lower; fits 2002-2004 Audi A6, lower; fits 2002-2004 Audi A6 Quattro, lower.

Common Uses

  • Replacing a worn or noisy lower timing belt idler pulley
  • Restoring proper timing belt routing on interference-engine Audi applications
  • Addressing belt tracking issues caused by pulley wear
  • Correcting timing system noise from a damaged pulley bearing or surface
  • Supporting maintenance on the engine valve train timing drive

Installation Notes

Verify the lower pulley position, belt path, and OE reference before installation. Inspect the timing belt, tensioner, and adjacent idlers for wear while servicing the timing system. Confirm fitment by year, model, and engine configuration on 2002-2006 Audi A4 and A4 Quattro, plus 2002-2004 Audi A6 and A6 Quattro applications.

Quality Assurance

Gates PowerGrip idler pulleys are offered as OE-style timing components with fixed-idler and tensioner-bracket replacement coverage in the product line. The T42138 is built with a steel body and flanged design to meet timing system service requirements.

BrandGates
Part NumberT42138
PositionTiming Belt Pulley, Lower
MaterialSteel
Inside Diameter10
Width37
Outside Diameter59
Flanged EndYes
Contact SurfaceSmooth/backside
ContentsPulley

This part fits 15 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2006AudiA4 Quattro3.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2005AudiA43.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2005AudiA4 Quattro3.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2004AudiA43.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2004AudiA4 Quattro3.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2004AudiA63.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2004AudiA6 Quattro3.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2003AudiA43.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2003AudiA4 Quattro3.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2003AudiA63.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2003AudiA6 Quattro3.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2002AudiA43.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2002AudiA4 Quattro3.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2002AudiA63.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley
2002AudiA6 Quattro3.0LV6GASLowerCompatible with interference engines.; Timing Belt Pulley

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

06C109244C85543FU99298T42138

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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