The 07K 145 172B is a URO Parts OE-style accessory drive belt idler pulley for select Volkswagen and Audi 2.5L 5-cylinder applications. Engineered to OE dimensions with a sealed bearing, this direct-fit pulley restores correct belt alignment and smooth, quiet accessory drive operation.
$22.72
The 07K 145 172B Accessory Belt Idler Pulley by URO Parts is an OE-style replacement for select Volkswagen and Audi vehicles. The idler pulley guides the accessory drive (serpentine) belt through its routing path, maintaining proper belt alignment and load distribution across all belt-driven accessories — including the alternator and A/C compressor.
Because the idler pulley spins continuously at engine speed, its sealed bearing is subject to constant load, heat, and contamination over time. As the bearing wears, it generates chirping or grinding noise, allows pulley wobble, and causes belt flutter and uneven belt wear. Left unaddressed, a failing idler pulley accelerates belt deterioration and can result in unexpected belt loss. Replacing the worn unit with this 07K 145 172B restores quiet, consistent belt tracking and long-term accessory drive reliability.
URO Parts is a dedicated European aftermarket supplier offering OE-alternative components engineered to match factory dimensions, clearances, and performance specifications. The 07K 145 172B is built to OE pulley profile and bearing specifications, ensuring full belt contact and correct tracking alignment throughout the accessory drive circuit. Its sealed bearing delivers smooth, quiet rotation under continuous engine load — a true direct-fit replacement requiring no modifications to the engine bay.
Catching idler pulley failure early prevents accessory belt loss and downstream damage. Look for the following symptoms:
Chirping, squealing, or grinding noise from the front of the engine that changes with RPM
Visible pulley wobble or lateral movement when inspected at idle
Belt flutter, vibration, or inconsistent tracking across pulleys
Accelerated or uneven wear on the accessory drive belt
Roughness or resistance when spinning the pulley by hand with the engine off
If any of these indicators are present, the idler pulley should be replaced promptly.
OEM Reference: 07K 145 172B
Brand: URO Parts — OE-style European replacement supplier
High-quality sealed bearing for smooth, quiet rotation under continuous load
OE-spec pulley profile for correct belt alignment and tracking
Heat- and vibration-resistant construction for long service life
Direct-fit replacement — no modifications required
Helps prevent belt squeal, flutter, and premature belt wear
Always inspect and replace the accessory drive belt if it shows cracking, glazing, or fraying — replacing both together ensures a complete service
Check the belt tensioner and all remaining pulleys for bearing noise, play, or rough rotation; replace any worn components at the same time
Verify correct belt routing before startup to ensure the belt is fully seated in all pulley grooves
Always verify fitment by VIN before ordering. Multiple variants may exist within the same model year.
07K 145 172B (OEM VAG)
Gates 36126
URO Parts 07K145172B
Continental Elite 49167
Dorman 419-701
| Weight | 1.2 lbs |
|---|---|
| Dimensions | 6.0 × 5.0 × 4.0 in |
| Year | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 2012-2013 | Audi | TT RS | 2.5L | |
| 2010-2014 | Volkswagen | Golf | 2.5L | |
| 2005-2014 | Volkswagen | Jetta | 2.5L | |
| 2006-2009 | Volkswagen | Rabbit | 2.5L |
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