CHRYSLER 5278998AA Fuel Filler Neck Gas Cap

( Brand: Chrysler ), ( Manufacturer Part Number: 5278998AA ), ( Part Type: Fuel Filler Cap ), ( Id: 916cef8a-b71d-4306-a794-6167f4c98866 ), ( Interchange: 179-cpi ), ( Year: 2004 ), ( Partout Id: A-128803867 )

Review CHRYSLER Dodge Fuel Filler Neck Assembly Gas Cap Oem fits NEON 2003–2005

The **Chrysler 5278998AA 2003 2005 Dodge Neon Fuel Filler Neck and Gas Cap** is a precision-engineered component designed to seamlessly integrate with the fuel system of these popular compact cars, ensuring both functionality and durability. Crafted from high-quality materials, this fuel filler neck and gas cap assembly features a sturdy, corrosion-resistant construction that resists wear from environmental exposure, gasoline vapors, and the mechanical stresses of daily use. The neck itself is engineered to fit snugly into the vehicle s fuel tank opening, providing a tight seal that prevents fuel leaks, vapor loss, and contamination from debris or moisture. The integrated gas cap, equipped with a secure locking mechanism, not only secures the filler neck in place but also includes a fuel-filler door that remains closed when the vehicle is in motion, enhancing safety and reducing the risk of accidental spills or fuel evaporation.

This part is specifically tailored to match the exact specifications of the **2003, 2004, and 2005 Dodge Neon**, including models equipped with the **2.0L or 2.4L inline-four engines**, ensuring compatibility with the vehicle s fuel system architecture. The filler neck is designed with a smooth, tapered interior to facilitate easy insertion and removal of the fuel nozzle, while the gas cap s ergonomic grip allows for effortless handling. Additionally, the assembly includes a reliable **O-ring seal** at the base of the filler neck, which maintains an airtight connection to the fuel tank, helping to preserve fuel efficiency and comply with emissions regulations. Whether replacing a worn-out original component or upgrading for improved performance, this fuel filler neck and gas cap assembly offers a dependable, long-lasting solution that restores both the aesthetic and functional integrity of the Dodge Neon s fuel system.

### **Pros and Cons of Buying a 2003 2005 Dodge Neon Fuel Filler Neck and Gas Cap (Part # 5278998AA)**

1. **Direct Fitment** This part is designed specifically for the 2003 2005 Dodge Neon, ensuring compatibility without modifications.

2. **Prevents Fuel Leaks** A faulty fuel filler neck or gas cap can cause fuel evaporation, leaks, or even a check engine light due to improper sealing.

3. **Improves Fuel Efficiency** A properly sealed fuel system reduces fuel vapor loss, which can slightly improve mileage.

4. **Prevents Vapor Lock** A damaged filler neck can allow debris or moisture into the fuel line, leading to engine performance issues.

5. **Easy Installation** These parts are relatively straightforward to replace, requiring minimal tools and no special expertise.

6. **Cost-Effective** Compared to labor costs for a mechanic, purchasing and installing this part yourself saves money.

7. **Prevents Check Engine Light (CEL)** A failing fuel cap or neck can trigger a CEL due to improper fuel pressure readings from the EVAP system.

1. **Potential Counterfeit Parts** Some aftermarket parts may not meet OEM standards, leading to premature failure or leaks.

2. **Rust or Wear Over Time** If the original part was already degraded, the new one may still fail if the underlying issue (e.g., fuel line damage) persists.

3. **Limited Availability** While this part is common, older models may have reduced stock in some regions, requiring online purchases.

4. **DIY Risk** If not installed correctly, improper sealing can lead to leaks or improper EVAP system function.

5. **No Warranty on Aftermarket Parts** Unless purchased from a reputable dealer, aftermarket replacements may lack manufacturer-backed warranties.

The **2003 2005 Dodge Neon fuel filler neck and gas cap (5278998AA)** is a **practical and cost-effective replacement** for those experiencing leaks, check engine lights, or fuel system inefficiencies. The benefits such as improved fuel system integrity, better mileage, and prevention of further damage outweigh the minor drawbacks, particularly if sourced from a trusted supplier. However, ensuring the part is genuine and installing it correctly is crucial to avoid future issues.

- **Buy from a reputable source** (e.g., RockAuto, Amazon, or a local auto parts store with return policies).

- **Check for leaks or damage** in the surrounding fuel lines before installation to prevent recurring problems.

- **Follow installation instructions carefully** to ensure a proper seal.

- **Consider professional installation** if unsure, especially if the EVAP system is already malfunctioning.

- **Replace both the filler neck and gas cap** if either is compromised, as they work together in the fuel system.

For most owners dealing with a failing fuel system, this part is a **worthwhile investment** that can extend the life of the vehicle and prevent more costly repairs down the line.

Details:

Fuel Filler Neck. Search for more parts DODGE NEON. Model: DODGE NEON. NEON 05 Neon; SE, SRT-4 SXT.

part #: 5278998aa prices

• $19.43-$166.25

specifications fueltanksysteme:

• for models: Neon
• for makes: Dodge, Chrysler
• for years: 2003-2005
• brand: Chrysler
• mpn: 5278998aa
• part type: Fuel Filler Cap
• id: 916cef8a-b71d-4306-a794-6167f4c98866
• interchange: 179-cpi
• year: 2004
• partout id: A-128803867

offer fueltanksysteme:

• sold: 0
• best offers: True
• availability: In Stock
• quantity: 1
• started: May 20, 2026
• options: Ship-to-home

returns fueltanksysteme:

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

seller fueltanksysteme:

• # reviews: 16660
• rating: 99.6%
• city: Brush, Colorado

shipping fueltanksysteme:

• service: Standard
• type: Fixed
• cost: $0.00
• transit: 2-6 Days
• class: Standard

payments fueltanksysteme:

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

general fueltanksysteme:

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

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