07K 145 172C (METRIX)

Description

Product Description

The 07K145172C Accessory Belt Idler Pulley by METRIX is an OE‑style replacement designed for select Volkswagen and Audi applications. This idler pulley guides the serpentine (accessory) belt and helps maintain correct belt routing and alignment so belt‑driven components—such as the alternator and A/C compressor—operate smoothly and reliably.

Idler pulleys spin constantly whenever the engine is running, and over time the sealed bearing can wear from heat, mileage, and contamination. A failing bearing may cause chirping or grinding noises, pulley wobble, and belt tracking issues that can accelerate belt wear. Replacing the worn pulley with this METRIX 07K145172C helps restore quiet operation, proper belt alignment, and dependable accessory drive performance.

• OEM reference: 07K 145 172C
• Brand: METRIX – OE‑style aftermarket replacement supplier
• Sealed bearing for smooth, quiet rotation and extended service life
• OE‑spec pulley profile to maintain correct belt tracking and alignment
• Helps reduce belt squeal, vibration, and premature belt wear
• Direct‑fit replacement; no modifications required

Applications

Used on select VW/Audi models that specify accessory belt idler pulley part number 07K145172C.

(Fitment varies by engine code and model year—confirm by VIN or parts catalog.)

Service Notes

• Inspect the serpentine belt and replace it if cracked, glazed, or frayed.
• Check the belt tensioner and other pulleys for noise or play to avoid repeat failures.
• Verify correct belt routing and full seating in all pulley grooves before starting the engine.

Additional information