AUDI 4S8-201-609-B Fuel Tank Filler Neck

( Manufacturer Part Number: 4S8-201-609-B ), ( Part Type: Fuel Tank Filler ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Year: 2017 2018 2020 2021 2022 2023 )

Review AUDI Genuine Fuel Tank Filler Neck fits 2017–2023

The **Audi 4S8-201-609-B Fuel Tank Filler Neck** is a precision-engineered component designed exclusively for Audi vehicles, serving as the critical interface between the fuel system and the vehicle s exterior. Crafted from high-grade, corrosion-resistant materials, this filler neck is built to withstand the harsh environmental conditions encountered during daily driving, including exposure to UV radiation, temperature fluctuations, and chemical exposure from fuel vapors. Its sleek, aerodynamic design ensures a seamless integration with the vehicle s bodywork, maintaining both functionality and aesthetic appeal while minimizing air resistance and potential leaks. The filler neck features a secure, snap-fit connection at the top, ensuring a tight seal that prevents fuel spillage and vapor loss, while the internal gasket provides an additional barrier against moisture and contaminants. Engineered to meet Audi s stringent quality standards, this part is compatible with a range of models, including those equipped with direct fuel injection systems, where precise fuel delivery is paramount. Whether installed during original equipment replacement or as part of a performance upgrade, this filler neck guarantees reliable operation, contributing to the vehicle s overall efficiency and longevity. Its robust construction and precise tolerances make it an essential component for maintaining the integrity of the fuel system, ensuring optimal performance and compliance with emissions regulations.

**Pros and Cons of buying a Audi 4S8 (2011-2016) Fuel Tank Filler Neck (Part Number: 609-B)**

### **Pros**

1. **OEM Quality and Fit** This is an original equipment manufacturer (OEM) part, meaning it is designed to match the exact specifications of your Audi s fuel system. It ensures a proper fit, reducing the risk of leaks or improper installation.

2. **Reliability** Audi parts, even aftermarket OEM replacements, are generally built to high standards. A genuine or high-quality aftermarket filler neck will provide durability and longevity, especially if your vehicle is frequently driven.

3. **Prevents Fuel Spills and Contamination** A faulty or damaged filler neck can lead to fuel leaks, which pose fire hazards and can contaminate the fuel system. Replacing it ensures a secure seal and proper fuel flow.

4. **Compatibility with Audi Systems** The filler neck integrates with the fuel cap mechanism, fuel level sensor (if applicable), and sometimes the fuel door lock system. Using the correct part prevents electrical or mechanical malfunctions.

5. **Easier Maintenance** A well-functioning filler neck simplifies refueling and reduces the likelihood of clogs or blockages in the fuel system, which can cause engine performance issues.

6. **Warranty Coverage (If Purchased from Authorized Sellers)** Some aftermarket OEM parts come with warranties, providing peace of mind in case of defects. Always check the seller s warranty policy before purchasing.

7. **Prevents Further Damage** Ignoring a failing filler neck can lead to more expensive repairs, such as fuel line damage, fuel pump failure, or even internal engine issues if fuel enters unintended areas.

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### **Cons**

1. **Cost** OEM or high-quality aftermarket parts for Audi vehicles can be expensive compared to generic aftermarket alternatives. Prices may range from $100 to $300 or more, depending on the source and brand.

2. **Installation Complexity** While the replacement itself is straightforward, some Audi models (especially those with integrated fuel level sensors or complex wiring) may require careful handling to avoid damaging nearby components. DIYers without mechanical experience may need professional help.

3. **Availability of Genuine Parts** While this part is widely available, sourcing a genuine Audi part (rather than a high-quality aftermarket replica) may require purchasing from an authorized dealer or Audi-approved supplier, which can be more costly.

4. **Potential for Counterfeit Parts** Buying from untrusted sellers (e.g., unverified online marketplaces) risks receiving counterfeit or low-quality parts that may fail prematurely or not fit correctly.

5. **Time Required for Replacement** If you re not experienced with automotive repairs, the process may take several hours, especially if you need to remove the fuel tank partially or disconnect wiring.

6. **Additional Costs** Beyond the part itself, you may incur labor costs if you hire a mechanic, or you might need to purchase tools (e.g., fuel line clamps, torque wrench) if you re doing it yourself.

7. **Risk of Overlooking Underlying Issues** If the filler neck failure is symptomatic of a larger problem (e.g., a damaged fuel line, faulty fuel cap, or sensor issues), replacing just the filler neck may not fully resolve the problem without addressing the root cause.

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### **Conclusion**

The Audi 4S8 (2011-2016) fuel tank filler neck (609-B) is a critical component that, when replaced with a high-quality OEM or aftermarket part, ensures proper fuel system function, prevents leaks, and avoids further damage. The benefits of using the correct part such as reliability, compatibility, and safety far outweigh the drawbacks, provided you source it from a reputable supplier and handle the installation carefully.

The primary drawbacks (cost, installation difficulty, and potential counterfeit risks) can be mitigated by purchasing from authorized dealers, verifying the part s authenticity, and either seeking professional help or thoroughly researching the replacement process if attempting a DIY fix.

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### **Recommendation**

1. **Source the Part Carefully** Purchase from an Audi-approved supplier, an authorized dealer, or a well-reviewed aftermarket parts retailer (e.g., RockAuto, Dorman, or local Audi specialty shops). Avoid unknown sellers to ensure you re getting a genuine or high-quality replacement.

2. **Consider Professional Installation** If you re not comfortable working on fuel systems, have a trusted mechanic perform the replacement. This ensures proper sealing, avoids fuel spills, and reduces the risk of damaging other components.

3. **Check for Additional Issues** While replacing the filler neck, inspect the surrounding fuel lines, fuel cap, and fuel door mechanism for signs of wear or damage. Addressing these simultaneously can prevent future problems.

4. **Follow Manufacturer Guidelines** Use the correct torque specifications and ensure all connections are secure. Improper installation can lead to leaks or electrical issues.

5. **Budget for Potential Extras** If you re unsure about your mechanical skills, account for labor costs upfront. Also, consider purchasing a fuel line clamp kit or other necessary tools if you re doing it yourself.

**Final Verdict:** Replacing the Audi 4S8 filler neck with the correct part is a worthwhile investment to maintain your vehicle s reliability and safety. Prioritize quality and proper installation to maximize the part s lifespan and performance.

Details:

Parts must be resalable and in the original packaging. Electrical parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Audi Mid West.

All of the parts on our site are genuine OEM at discount prices that ship directly to your door fast and affordably.

part #: 4s8201609 prices

• $22.41-$49.51

specifications fueltanksysteme:

• for makes: Audi
• for years: 2017-2023
• mpn: 4s8-201-609-b
• part type: Fuel Tank Filler
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• year: 2017 2018 2020 2021 2022 2023

returns fueltanksysteme:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

general fueltanksysteme:

• condition: New
• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks

seller fueltanksysteme:

• city: Omaha, Nebraska
• rating: 99.9%
• # reviews: 2419

shipping fueltanksysteme:

• transit: 6-11 Days
• type: Fixed
• class: Standard
• cost: $9.15
• service: Standard

offer fueltanksysteme:

• quantity: 1
• started: February 25, 2026
• availability: In Stock
• sold: 0
• options: Ship-to-home

payments fueltanksysteme:

• other
• credit card: Visa
• wallet: Apple-pay

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