The 07K 145 172C is a Metrix OE-style lower 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 — no modifications required.
$15.00
The 07K 145 172C Accessory Belt Idler Pulley by Metrix is an OE-style replacement for select Volkswagen and Audi vehicles equipped with the 2.5L 5-cylinder engine. This lower idler pulley serves as a fixed guide point in the accessory drive system, maintaining proper belt routing, alignment, and consistent 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 heat, load, and contamination over time. As the bearing wears, it produces 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 lead to unexpected belt loss. Replacing the worn unit with this 07K 145 172C restores quiet, consistent belt tracking and long-term accessory drive reliability.
Metrix supplies OE-style replacement components engineered to match factory dimensions, clearances, and performance specifications. The 07K 145 172C 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 172C
Brand: Metrix — OE-style aftermarket replacement supplier
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 lower idler pulley — 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 172C (OEM VAG)
Gates 36105
Continental Elite 49166
Dorman 419-702
URO Parts 07K145172C
| Weight | 0.80 lbs |
|---|---|
| Dimensions | 5.0 × 5.0 × 2.0 in |
| Year | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 2012-2013 | Audi | TT RS | 2.5L | |
| 2006-2010, 2012-2014 | Volkswagen | Beetle | 2.5L | |
| 2010-2014 | Volkswagen | Golf | 2.5L | |
| 2005-2014 | Volkswagen | Jetta | 2.5L | |
| 2012-2014 | Volkswagen | Passat | 2.5L | |
| 2006-2009 | Volkswagen | Rabbit | 2.5L |
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