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GENUINE PORSCHE Drive Belt Tensioner - PAB 903 315
Genuine Porsche parts diagram
Genuine Porsche parts diagram
GENUINE PORSCHE Drive Belt Tensioner - PAB 903 315
Genuine Porsche parts diagram
Genuine Porsche parts diagram

GENUINE PORSCHE Drive Belt Tensioner PAB 903 315

GENUINE PORSCHE
Disponibilité:
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UGC PAB 903 315
$244.53 - $244.53
$244.53
$244.53 - $244.53
$244.53
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 PORSCHE

Tension Roller

This product also goes by these part numbers: PAB 903 315, PAB903315

This part also goes by the following cross reference.

Cross Reference Part Number: PAB903315

Fits These Vehicles 6 applications
Porsche
Make Model Engine Years
Porsche CayenneBase, Coupe, Coupe Platinum Edition, E-Hybrid, E-Hybrid Coupe, E-Hybrid Coupe Platinum Edition, E-Hybrid Platinum Edition, Platinum Edition, S, S Coupe, S Coupe Platinum Edition, S Platinum Edition 2.9V6 2019–2023
Porsche CayenneBase, Coupe, Coupe Platinum Edition, E-Hybrid, E-Hybrid Coupe, E-Hybrid Coupe Platinum Edition, E-Hybrid Platinum Edition, Platinum Edition, S, S Coupe, S Coupe Platinum Edition, S E-Hybrid, S Platinum Edition 3.0V6 2019–2026
Porsche MacanGTS, S, Turbo 2.9V6 2020–2026
Porsche MacanGTS, S, Turbo 3.0V6 2019–2021
Porsche Panamera4, 4 E-Hybrid, 4 E-Hybrid Executive, 4 E-Hybrid Platinum Edition, 4 E-Hybrid Sport Turismo, 4 Executive, 4 Platinum Edition, 4 Sport Turismo, 4S, 4S E-Hybrid, 4S E-Hybrid Executive, 4S E-Hybrid Sport Turismo, 4S Executive, 4S Sport Turismo, Base, Platinum Edition 2.9V6 2017–2026
Porsche Panamera4, 4 E-Hybrid, 4 E-Hybrid Executive, 4 E-Hybrid Sport Turismo, 4 Executive, 4 Sport Turismo, 4S, 4S Executive, 4S Sport Turismo, Base 3.0V6 2017–2020

Fitment data last updated: 2026-07-29

Fits 6 vehicle applications Check vehicle fitment before ordering View fitment

About this Belt Tensioner & Idler Pulley

The GENUINE PORSCHE PAB 903 315 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.

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