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          Gates 38406 - Accessory Drive Belt Tensioner Assembly

          MPN: 38406
          The Gates 38406 Accessory Drive Belt Tensioner Assembly ensures proper belt tension in Audi vehicles, enhancing engine performance and efficiency. Engineered for a perfect fit.
          0.0
          Vehicle Specific
          Check if this part fits your vehicle.
          • $111.95
          In stock

          Product Overview

          The Gates Accessory Drive Belt Tensioner Assembly part number 38406 is engineered specifically for Audi vehicles, providing a reliable and durable solution to keep your engine running smoothly. This tensioner assembly is designed to maintain optimal belt tension, preventing slippage and ensuring efficient power transfer. Crafted from high-quality materials, it offers long-lasting performance and is built to withstand the demands of daily driving. Choose Gates 38406 for dependable performance and peace of mind every time you service your vehicle.

          Cross Reference Numbers

          This Gates 38406 is equivalent to or replaces the following part numbers: ACDelco 38406, Carquest 38406, Dayco 305626, Dayco 89626, Goodyear 49388, Litens 950476A, NAPA Belts/Hose 38406, Tendeco 950476, Volkswagen 06C903133B.

          Vehicle Compatibility

          • Audi A4 Quattro 3.0 V6 (2002–2006)
          • Audi A4 3.0 V6 (2002–2005)
          • Audi A6 Quattro 3.0 V6 (2002–2004)
          • Audi A6 3.0 V6 (2002–2004)

          This may also fit other applications. Please use the vehicle selector tool to verify fitment.

          Why Shop at eEuroparts.com?

          • Proven Expertise: Over 25 years of experience with European vehicles means we know your car inside and out.
          • Exclusive Kits That Fitâ„¢ - complete repair solutions with no guesswork
          • Fitment Confidence: Our accurate cataloging ensures you get the right part the first time.
          • Fast, Reliable Shipping: Orders ship quickly from our U.S.-based warehouses.
          • Transparent Pricing: Competitive prices with no hidden fees or surprise charges.
          • Established Trust: Serving the European auto community since 2000.

          Frequently Asked Questions

          What does the Gates 38406 Accessory Drive Belt Tensioner Assembly do?

          The Accessory Drive Belt Tensioner Assembly plays a crucial role in maintaining the correct tension on the accessory drive belt. This ensures that various engine components, such as the alternator and power steering pump, operate efficiently without slippage, leading to better overall vehicle performance.

          How do I know if my Accessory Drive Belt Tensioner Assembly needs replacement?

          Key signs that the accessory drive belt tensioner may need replacement include unusual noises from the engine, visible wear on the accessory belt, or decreased performance of engine components relying on the drive belt, such as the alternator or power steering pump.

          Can I install the Gates 38406 myself?

          Yes, the Gates 38406 can be installed by a DIY enthusiast. However, ensure you have the right tools and follow proper installation procedures to avoid any damage.

          What are the symptoms of a faulty Accessory Drive Belt Tensioner Assembly?

          Symptoms include squeaking or rattling noises from the engine compartment, poor performance of accessories like the alternator, and visible damage to the drive belt. These issues can lead to decreased efficiency and potential engine damage if not addressed promptly.

          Why should I choose Gates for my Accessory Drive Belt Tensioner Assembly needs?

          Gates is a trusted brand known for its high-quality automotive parts. Order Gates 38406 today for a factory-correct replacement that restores safety and performance.

          Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.

            • eEuroparts SKU
              291723
            • Weight
              2.5 lbs
            • Dimensions (L x W x H)
              6.7 x 4.625 x 9.75 in
            • Barcode
              00770075344315
            • Manufacturer Part #
              38406
          • Brand
            Gates
          • Manufacturer
            Gates
          • MPN
            38406
          • Part Type
            Accessory Drive Belt Tensioner Assembly
          • OE Part Numbers
            06C903133B
          • Cross Reference Numbers
            38406, 305626, 89626, 950476, 49388, 950476A, 4024
          • Features
            Bearing Bore Inside Diameter : .67
            Bearing Bore Inside Diameter : 17
            Belt Type : V-Ribbed
            Contact Surface : Smooth/Backside
            Contents : Tensioner Assy.
            Grade Type : OE Exact
            Material : Steel
            Mounting Hole Quantity : 3
            Outside Diameter 1 (in) : 2.76
            Outside Diameter 1 (mm) : 70
            Pulley 1 Flanged : No
            Pulley Quantity : 1
            Width 1 (in) : .94
            Width 1 (mm) : 24
          • Fitment
            • Fitment Type
              Vehicle Specific
          YearMakeModelSubmodelNotes
          2006AudiA4 QuattroCabriolet (3.0 V6 GAS)
          2005AudiA4Base (3.0 V6 GAS)
          2005AudiA4Cabriolet (3.0 V6 GAS)
          2005AudiA4 QuattroAvant (3.0 V6 GAS)
          2005AudiA4 QuattroBase (3.0 V6 GAS)
          2005AudiA4 QuattroCabriolet (3.0 V6 GAS)
          2004AudiA4Base (3.0 V6 GAS)
          2004AudiA4Cabriolet (3.0 V6 GAS)
          2004AudiA4 QuattroAvant (3.0 V6 GAS)
          2004AudiA4 QuattroBase (3.0 V6 GAS)
          2004AudiA4 QuattroCabriolet (3.0 V6 GAS)
          2004AudiA6Base (3.0 V6 GAS)
          2004AudiA6 QuattroAvant (3.0 V6 GAS)
          2004AudiA6 QuattroBase (3.0 V6 GAS)
          2003AudiA4Base (3.0 V6 GAS)
          2003AudiA4Cabriolet (3.0 V6 GAS)
          2003AudiA4 QuattroAvant (3.0 V6 GAS)
          2003AudiA4 QuattroBase (3.0 V6 GAS)
          2003AudiA6Base (3.0 V6 GAS)
          2003AudiA6 QuattroAvant (3.0 V6 GAS)
          2003AudiA6 QuattroBase (3.0 V6 GAS)
          2002AudiA4Base (3.0 V6 GAS)
          2002AudiA4 QuattroAvant (3.0 V6 GAS)
          2002AudiA4 QuattroBase (3.0 V6 GAS)
          2002AudiA6Base (3.0 V6 GAS)
          2002AudiA6 QuattroAvant (3.0 V6 GAS)
          2002AudiA6 QuattroBase (3.0 V6 GAS)
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          Warranty Overview

          At eEuroparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.

          Standard Warranty – Most Parts

          • Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.

          • Protection: Defects in materials or workmanship under normal personal use.

          • Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.

          • Exclusions:

            • Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)

            • Commercial, fleet, rideshare, off-road, or racing use

            • Improper installation, misuse, accidents, or modifications

          • Not Covered: Labor, shipping, towing, or incidental costs.

          Bison Performance Warranty – Our House Brand

          • Coverage: Limited Lifetime Warranty for as long as you own your vehicle.

          • Applies To: All products sold under the Bison Performance label.

          • Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.

          • Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).

          • What’s Included: Replacement of the defective product (labor and shipping excluded).

          Warranty Claim Requirements

          To keep claims fast and fair, we require:

          • Proof of purchase (invoice or order confirmation).

          • Photos or videos showing the defective part, order number, date, VIN, and odometer reading.

          • Diagnostic reports or part returns for non-visible issues may be requested.

          • Claims must be truthful, properly documented, and reflect normal consumer use.

          Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.

          For full details and exclusions, please see our complete Warranty Terms & Conditions.

          This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.

          Return Policy Overview

          Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
          To start a return, contact customer support via Chat or Contact Us.

          • Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)

          • Refunds: Issued to your original payment method within 3–5 business days after inspection

          • Exchanges: Not automatic — please return and reorder

          • Replacements: May be approved for incorrect or defective items reported within 7 days

          Not returnable:

          • Used or installed parts

          • Electrical components

          • Opened filter kits, gaskets, or contaminated items

          • Final sale or custom orders

          Important Notes:

          • Return shipping is your responsibility unless we made a verified error

          • Fitment is the customer’s responsibility (we can assist, but do not guarantee)

          • Country of origin may vary and is not grounds for return

          For complete details, please see our full Return Policy.


          This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.

          Fast, Reliable Shipping — Straight to Your Door

          We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.

          • We use trusted carriers like UPS, FedEx, and USPS.

          • Tracking info is emailed to you as soon as your order ships.

          • Delivery estimates at checkout are based on carrier data, but not guaranteed.

          Need help with a shipment?

          If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.

          For complete details, please see our full Shipping Policy.


          This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions, risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.

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