Accessory Drive Belt Guide for the 2011-2016 Audi A4
Understand the signs of a failing accessory belt and how to choose the right replacement for your B8 Audi A4.
- A squealing noise is the most common symptom of a failing accessory belt or tensioner.
- Visually inspect the belt for cracks, fraying, or a glazed appearance.
- It is strongly recommended to replace the belt, tensioner, and idler pulleys as a kit.
- Aftermarket brands like Gates, Bando, and Mitsuboshi offer OEM-quality replacements.
Is Your Accessory Belt Failing?
A worn accessory belt on your Audi A4 will almost always give you warning signs before it breaks completely. The most common symptom is a high-pitched squealing or chirping noise, especially when you first start the engine or when turning the steering wheel. You might also notice the battery warning light on your dashboard, dimming headlights, or an A/C system that isn't cooling properly. A visual inspection can also reveal problems; look for cracks, fraying, missing chunks, or a glazed, shiny appearance on the belt's surface.
🎬 Follow this video tutorial for a complete drivebelt replacement.Known Issues for the 2011-2016 Audi A4
While there are no specific recalls from the National Highway Traffic Safety Administration (NHTSA) for the accessory drive belt on the 2011-2016 Audi A4, a common failure point is the belt tensioner. A weak or failing tensioner can cause a perfectly good belt to slip, squeal, and wear out prematurely. For this reason, it is highly recommended to replace the belt tensioner and any idler pulleys 🎬 See how to access the accessory belt on B8.5 models. at the same time you replace the belt. This is often sold as a complete kit.
Pro Tip: Replace as a Kit
To ensure the reliability of the entire system, always replace the accessory belt, tensioner, and idler pulleys together. A new belt can be quickly ruined by a worn-out tensioner.
Choosing the Right Aftermarket Belt
For your Audi A4, you don't need to buy a genuine Audi part to get excellent quality. Many aftermarket brands are the original equipment manufacturers (OEM) for Audi and other European cars. When choosing a replacement, consider these trusted brands:
- Gates: A widely respected brand in the aftermarket community, known for producing reliable, high-quality belts that meet or exceed OEM standards.
- Bando: Often an OEM supplier for many Japanese vehicles, Bando is also recognized for making high-quality, durable belts suitable for European cars.
- Mitsuboshi: Another top-tier OEM supplier, primarily for Japanese manufacturers, with a reputation for excellent quality and longevity.
All three of these brands are considered good choices. Forum discussions often show a preference for Gates or Continental (another OEM supplier) for European vehicles like Audi, but Bando and Mitsuboshi are also seen as quality alternatives.
Accessory Drive Belt Cost for 2011-2016 Audi A4
| Part Type | Estimated Cost |
|---|---|
| New OEM Belt | $50 - $90 |
| New Aftermarket Belt | $24 - $40 |
| Shop Labor | $100 - $200 |
Cost estimates are approximate and can vary based on location and vehicle specifics.
Frequently Asked Questions
When should I replace my Audi A4's accessory belt?
The recommended replacement interval for the B8 Audi A4 (2011-2016) is typically around 75,000 miles. However, you should inspect the belt regularly during oil changes and replace it based on condition, not just mileage.
Can I do this replacement myself?
Yes, for a mechanically inclined owner with the right tools, this is a feasible DIY job. You will need a long-handled 16mm wrench or a specific serpentine belt tool to release the tensioner. The job involves raising the front of the car and removing the passenger-side wheel and splash shield for access.
🎬 Watch this step-by-step guide to replacing your B8 serpentine belt.What happens if the belt breaks while I'm driving?
If the accessory belt breaks, you will immediately lose power steering, the alternator will stop charging the battery, and the A/C will stop working. Your steering will become very heavy, and a battery warning light will appear. You should pull over safely as soon as possible.
Should I replace just the belt or the tensioner too?
It is highly recommended to replace the belt, tensioner, and any idler pulleys at the same time. The tensioner is a common failure point and a weak one can cause a new belt to fail quickly.
Helpful Videos
Technical Specifications
OEM Part Numbers: 06H903137C 06H903137G
The accessory drive belt for the 2.0L TFSI engine is a multi-ribbed (or poly-V) belt. Common lengths are around 1580mm to 1590mm with 6 ribs, but always verify the correct part number for your specific vehicle configuration.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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