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GENUINE VW/AUDI Drive Belt Idler Pulley - 079 903 389 D

GENUINE VW/AUDI Drive Belt Idler Pulley 079 903 389 D

GENUINE VW/AUDI
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UGC 079 903 389 D
$147.00 - $147.00
$147.00
$147.00 - $147.00
$147.00
CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

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GENUINE VW/AUDI

Drive Belt Idler Pulley

This product also goes by these part numbers: 079 903 389 D, 079903389D

This part also goes by the following cross reference.

Cross Reference Part Number: 079903389D

Fits These Vehicles 4 applications
Audi
Make Model Engine Years
Audi A8 Quattro 4.0L V8 2013–2018
Audi RS7 2014–2018
Audi S7 2013–2018
Audi S8 2013–2017

Fitment data last updated: 2026-07-19

Fits 4 vehicle applications Check vehicle fitment before ordering View fitment

About this Belt Tensioner & Idler Pulley

The GENUINE VW/AUDI 079 903 389 D is part of the accessory drive that runs the alternator, A/C compressor and other components. The tensioner keeps the drive belt at the right tension and idler pulleys guide it, and their bearings wear over time.

Frequently asked questions

What does a belt tensioner do?

It applies constant pressure to the drive belt so it grips the pulleys without slipping, and it absorbs the belt's movement as engine speed changes. Idler pulleys guide the belt around its path.

What are the signs of a worn tensioner or idler pulley?

A squeal or chirp from the front of the engine, a rumbling or grinding bearing noise, a belt that flutters, jumps or wears unevenly, or a tensioner arm that bounces or has visible play.

What should I replace along with it?

Replace the drive belt at the same time, and consider replacing the other pulleys if they have similar mileage, since their bearings wear at a similar rate.

Can I replace a tensioner myself?

Usually, yes. Note or photograph the belt routing before removing it, release the tension with the correct tool, and check the new belt sits correctly in every pulley groove before starting the engine.

How do I make sure this belt tensioner or pulley fits my car?

Compare the part numbers listed on this page with the number on your old part or in your vehicle's parts catalog, and check the fitment information. If you are unsure, contact us with your VIN before ordering.

Euromotiv is an independent retailer of OEM, Genuine, and aftermarket automotive parts. We are not affiliated with, endorsed by, or authorized by Audi AG, Volkswagen AG, BMW AG, Mercedes-Benz Group AG, Dr. Ing. h.c. F. Porsche AG, MINI, or any other vehicle manufacturer. All trademarks, logos, and brand names are the property of their respective owners and are used solely for identification and compatibility purposes.