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GatesPart #: T42138
Gates T42138 Engine Timing Belt Idler Pulley - Lower
⚙️ 15 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$92.23Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
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✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦Timing Belt Pulley, Lower
🚗Fitment: Audi, A4, A4 Quattro, A6, and A6 Quattro
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Engine Timing Belt Idler Pulley options
Gates T42138 Engine Timing Belt Idler Pulley - Lower
| Brand | Gates |
| Part Number | T42138 |
| Position | Timing Belt Pulley, Lower |
| Material | Steel |
| Inside Diameter | 10 |
| Width | 37 |
| Outside Diameter | 59 |
| Flanged End | Yes |
| Contact Surface | Smooth/backside |
| Contents | Pulley |
This part fits 15 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2006 | Audi | A4 Quattro | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2005 | Audi | A4 | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2005 | Audi | A4 Quattro | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2004 | Audi | A4 | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2004 | Audi | A4 Quattro | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2004 | Audi | A6 | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2004 | Audi | A6 Quattro | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2003 | Audi | A4 | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2003 | Audi | A4 Quattro | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2003 | Audi | A6 | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2003 | Audi | A6 Quattro | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2002 | Audi | A4 | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2002 | Audi | A4 Quattro | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2002 | Audi | A6 | 3.0L | V6 | GAS | Lower | Compatible with interference engines.; Timing Belt Pulley |
| 2002 | Audi | A6 Quattro | 3.0L | V6 | GAS | Lower | Compatible 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.