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MUBEA Belt Tensioner - 90238406

MUBEA
Disponibilidad:
5+ en stock, listo para ser enviado

Ships same or next business day

SKU 90238406
$230.40 - $230.40
$230.40
$230.40 - $230.40
$230.40
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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MUBEA

Belt Tensioner

This product also goes by these part numbers: 06N 903 133 B, 06N903133B, 90238406

This part also goes by the following cross reference.

Cross Reference Part Number: 06N903133B

Fits These Vehicles 7 applications
Audi
Make Model Engine Years
Audi A4 allroad 2021–2025
Audi A4 Quattro 2021–2025
Audi A5 Quattro 2021–2024
Audi A5 Sportback 2021–2024
Audi A6 Quattro 2.0L L4 2021–2025
Audi Q5 2021–2023
Audi Q5 Sportback 2021–2024

Fitment data last updated: 2026-07-19

Fits 7 vehicle applications Check vehicle fitment before ordering View fitment

About this Belt Tensioner & Idler Pulley

The MUBEA 90238406 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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