BUICK 25625378 Fuel Filler Neck Gas Cap

( Manufacturer Part Number: 25625378 ), ( Part Type: Fuel Filler Cap ), ( Id: B54dea71-ed94-47dd-b09e-da78a446f623 ), ( Interchange: 179-cpi ), ( Year: 1998 )

Review BUICK Fuel Filler Neck Assembly Gas Cap Oem fits LESABRE 1996–1999

The **Buick 25625378 Fuel Filler Neck and Gas Cap Assembly** for the **1996 1999 LesSabre** is a precision-engineered component designed to ensure a secure, leak-proof connection between your vehicle s fuel system and the gas tank, while also maintaining the integrity of fuel vapor emissions. Crafted from durable, corrosion-resistant materials, this assembly features a robust **metal filler neck** that integrates seamlessly with the LesSabre s fuel tank opening, providing a tight seal to prevent fuel spillage, vapor leaks, and contamination from debris. The **gas cap**, a critical part of the vehicle s evaporative emissions system (EVAP), is equipped with a **spring-loaded valve mechanism** that automatically seals when closed, reducing fuel vapor escape and helping the car pass emissions tests with ease. This particular part is engineered to match the exact specifications of the **1996 through 1999 LesSabre models**, ensuring compatibility with the vehicle s fuel system architecture, including the correct thread pitch and sealing surface. Beyond its functional reliability, the assembly also contributes to the LesSabre s classic aesthetic, as the filler neck and cap are designed to align perfectly with the vehicle s body panels, maintaining a clean, factory-like appearance. Whether replacing a worn-out or damaged original part or upgrading for enhanced performance and emissions compliance, this **OEM-quality fuel filler neck and gas cap** is an essential component for maintaining your LesSabre s operational efficiency and longevity.

### **Pros and Cons of Buying a 1996-1999 Buick LeSabre Fuel Filler Neck (Part # 25625378) with Gas Cap**

1. **Compatibility and Fit** The part number **25625378** is a direct replacement for the fuel filler neck and gas cap assembly on the **1996-1999 Buick LeSabre**, ensuring an exact fit without modifications.

2. **Prevents Fuel Spills and Evaporation** A properly functioning filler neck and cap reduce fuel spills during refueling and minimize fuel evaporation, improving efficiency.

3. **Prevents Contamination** A damaged or missing cap allows moisture, dirt, and debris to enter the fuel system, potentially causing clogs or corrosion in the fuel lines and tank.

4. **Maintains Vapor Pressure** The cap helps regulate vapor pressure in the fuel tank, reducing the risk of fuel system leaks or pressure-related issues.

5. **Cost-Effective Replacement** Replacing a worn or broken filler neck and cap is significantly cheaper than repairing fuel system damage caused by neglect.

6. **Easy Installation** The part is designed for straightforward replacement, requiring basic tools and minimal mechanical skill.

7. **Improves Resale Value** A well-maintained fuel system with intact components can positively influence a vehicle s resale value.

1. **Potential Rust or Corrosion** Older parts, especially those from a vehicle exposed to harsh conditions, may have internal rust or corrosion that isn t immediately visible.

2. **Worn or Stiff Gasket** Over time, the rubber gasket inside the cap or filler neck can degrade, leading to leaks even with a new part.

3. **Availability of Aftermarket vs. OEM** While OEM parts (original equipment manufacturer) are ideal for longevity, aftermarket alternatives may be cheaper but could have inconsistent quality.

4. **Fuel Tank Condition** If the fuel tank itself is damaged or corroded, replacing just the filler neck and cap won t fully resolve underlying issues.

5. **Installation Challenges** Some Buick models have tight spaces around the fuel tank, making removal and reinstallation difficult for inexperienced DIYers.

6. **Potential for Counterfeit Parts** Purchasing from untrusted sellers may result in fake or low-quality replacements that fail prematurely.

Replacing the **1996-1999 Buick LeSabre fuel filler neck (25625378) with gas cap** is a **practical and necessary maintenance task** for preventing fuel system issues. The benefits such as preventing leaks, contamination, and evaporation far outweigh the minor drawbacks, which are mostly related to part quality or installation difficulties. If sourced from a reputable supplier (preferably OEM or a well-reviewed aftermarket brand), this replacement is a **cost-effective solution** that extends the life of the vehicle s fuel system.

- **Purchase from a trusted source** (dealership, reputable auto parts store, or a verified online retailer) to ensure authenticity and quality.

- **Inspect the fuel tank** for rust or damage before installation if the tank is compromised, consider professional repair or replacement.

- **Follow proper installation steps** carefully, ensuring the gasket is intact and the cap seals securely.

- **Consider an OEM part** if longevity and reliability are priorities, though high-quality aftermarket options can also be a budget-friendly alternative.

- **Replace the filler neck and cap as part of routine maintenance** to avoid unexpected failures, especially if the vehicle is frequently driven or exposed to harsh conditions.

This replacement is a **simple yet impactful upgrade** that helps maintain the vehicle s performance and prevents more costly repairs down the line.

Details:

This part will fit the following: BUICK LESABRE 80 UP 96-99 Lower; Custom Limited. Search for more parts BUICK LESABRE. Fuel Filler Neck.

part #: 25625378 prices

• $48.88-$118.39

specifications fueltanksysteme:

• for models: Lesabre
• for makes: Buick
• for years: 1996-1999
• mpn: 25625378
• part type: Fuel Filler Cap
• id: B54dea71-ed94-47dd-b09e-da78a446f623
• interchange: 179-cpi
• year: 1998

seller fueltanksysteme:

• # reviews: 14488
• rating: 99.4%
• city: Brush, Colorado

shipping fueltanksysteme:

• cost: $0.00
• transit: 3-6 Days
• service: Standard
• class: Standard
• type: Fixed

general fueltanksysteme:

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

payments fueltanksysteme:

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

returns fueltanksysteme:

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

offer fueltanksysteme:

• sold: 0
• started: February 22, 2026
• quantity: 1
• best offers: True
• options: Ship-to-home
• availability: In Stock

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