VELVAC 5721016 Turn Fuel Cap Diesel 728974036749 03-37017-000 1/4

( Brand: Velvac ), ( Manufacturer Part Number: 5721016 ), ( Part Type: Turn Fuel Aluminum Cap ), ( Oe Spec Or Performance/custom: Oe Spec ), ( Ipn: 03-37017-000 ), ( Manufacturer Warranty: Yes ), ( Country Of Manufacture: United States ), ( Material: Aluminum ), ( Fuel Type: Diesel ), ( UPC: 728974036749 )

Review VELVAC Freightliner 1/4 Turn Fuel Cap Diesel Truck Aluminum

The **Velvac 5721016 Freightliner 1/4 Turn Fuel Cap** is a precision-engineered, high-performance replacement part designed specifically for Freightliner diesel engines, ensuring a secure and reliable seal for your vehicle s fuel system. Crafted from durable, corrosion-resistant materials, this fuel cap is built to withstand the harsh conditions of commercial trucking, including exposure to extreme temperatures, moisture, and the constant vibrations inherent in heavy-duty operations. Its **1/4 turn design** allows for quick and easy installation, reducing downtime during maintenance or repairs while maintaining a tight, leak-proof fit that prevents fuel evaporation and contamination. The cap features a **smooth, ergonomic grip**, making it easy to handle even with gloved hands, and its **threaded base** is engineered to match Freightliner s original equipment specifications, ensuring a perfect alignment with the fuel tank flange. This part is compatible with a wide range of Freightliner models, including those equipped with the **03-37017-00** fuel system components, providing an exact replacement that restores both functionality and aesthetics to your truck. Whether you re performing routine maintenance or replacing a worn-out cap, the Velvac 5721016 offers a dependable solution that prioritizes durability, ease of use, and compatibility, helping to keep your diesel-powered Freightliner running efficiently and safely on the road.

### **Pros and Cons of buying a Velvac 5721016 Freightliner 1/4 Turn Fuel Cap (Diesel, OEM Part #03-37017-00)**

1. **OEM Compatibility** This part is designed as an original equipment manufacturer (OEM) replacement for Freightliner trucks, ensuring a perfect fit and function without modifications. It uses the same specifications as the factory part, reducing the risk of leaks or improper sealing.

2. **Durable Construction** Velvac is a reputable aftermarket supplier known for producing high-quality, long-lasting parts. The 1/4 turn fuel cap is likely made from sturdy materials (such as metal or reinforced plastic) to withstand vibrations, temperature fluctuations, and repeated use.

3. **Easy Installation** The 1/4 turn design simplifies fueling compared to traditional screw-on caps, reducing the chance of spills or misalignment. It also typically requires fewer tools to install, making it accessible for DIY mechanics.

4. **Seal Integrity** A well-fitted fuel cap ensures a proper seal, preventing fuel vapors from escaping (which helps maintain fuel efficiency and reduces emissions). The OEM design minimizes the risk of leaks that could lead to fire hazards or fuel loss.

5. **Warranty Coverage** Velvac parts often come with warranties (varies by retailer), providing some recourse if the part fails prematurely. Always check the warranty terms before purchasing.

6. **Cost-Effective Alternative to OEM** While this is an aftermarket part, it is often priced lower than a brand-new Freightliner OEM cap without sacrificing quality. This makes it a budget-friendly option for repairs or replacements.

7. **Availability** Aftermarket parts like this are widely available through online retailers (Amazon, RockAuto, parts stores) and local dealerships, reducing lead times compared to ordering directly from Freightliner.

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1. **Potential Quality Variability** While Velvac is reliable, aftermarket parts can sometimes vary in quality depending on the batch or retailer. A poorly manufactured cap might not seal as effectively as the OEM part, leading to minor leaks or vapor loss over time.

2. **No Original Brand Support** If issues arise, customer service or warranty claims may not be as seamless as dealing with Freightliner s official support. Some mechanics or owners prefer sticking with OEM parts for peace of mind.

3. **Fitment Concerns (Non-OEM)** Although designed for compatibility, slight discrepancies in threading or alignment can occur, especially if the truck has been modified or if the original cap was damaged. Always inspect the fit before installation.

4. **Resale Value Impact** If you plan to sell the truck later, some buyers may prefer OEM parts for reassurance. While this cap is high-quality, it may not carry the same perceived value as a genuine Freightliner part.

5. **Limited Customization** Unlike some aftermarket parts, this is a direct replacement with no additional features (e.g., locking mechanisms, ergonomic grips). If you need specialized functionality, you may need to explore other options.

6. **Installation Risks** If the original gasket or sealing surface is damaged, the new cap may not create a perfect seal. This requires careful inspection of the fuel tank opening before installation to avoid leaks.

7. **Price Fluctuations** Aftermarket parts can sometimes experience price changes due to supply chain issues or retailer discounts. The cost may not be as stable as an OEM part, which is priced uniformly.

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The **Velvac 5721016 Freightliner 1/4 Turn Fuel Cap** is a strong aftermarket alternative to the OEM part, offering **reliable performance, ease of installation, and cost savings** without significant drawbacks. It is ideal for **budget-conscious owners, DIY mechanics, or those prioritizing functionality over brand loyalty**. However, if **absolute certainty in fitment, warranty support, or resale value** is critical, an OEM Freightliner part may be preferable though at a higher cost.

For most users, this Velvac part provides an **excellent balance of quality and affordability**, making it a **recommended choice** for replacement or upgrade. Always verify compatibility with your specific Freightliner model and inspect the part upon arrival to ensure it meets your needs.

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- You need a **direct OEM replacement** at a lower price.

- You prioritize **durability and ease of use** over brand-specific support.

- You re comfortable with **aftermarket parts** and have no concerns about minor variability in quality.

- You require **maximum warranty coverage** and official support.

- The truck is **high-value or used for commercial purposes** where resale matters.

- You suspect **sealing issues** and want to avoid any risk of leaks.

Details:

It can resist rain and oil stains, is impact-resistant, deform able, has a long service life. Packing List: 1 Fuel tank cap with 2 key, equipped a stainless steel safety chain and fasteners As shown in the first picture. Function: 3 Locking fuel caps is equipped with precise sealing structures such as rubber rings, which closely fit the tank opening, ensuring safety, cleanliness and stable supply of inside. Replace Part Number: Truck fuel tank cap with key replace part number 572.1018, 03-37017-002, 600149, 918010.

Material: Truck fuel cap is made of aluminum alloy and features a sandblasting process to prevent rust.

part #: 5721016 prices

• $31.99-$62.50

specifications fueltanksysteme:

• for makes: Freightliner
• brand: Velvac
• mpn: 5721016
• part type: Turn Fuel Aluminum Cap
• oe spec or performance/custom: Oe Spec
• ipn: 03-37017-000
• manufacturer warranty: Yes
• country of manufacture: United States
• material: Aluminum
• fuel type: Diesel
• upc: 728974036749

general fueltanksysteme:

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

returns fueltanksysteme:

• policy: No Returns

shipping fueltanksysteme:

• class: Standard
• cost: $0.00
• transit: 6-12 Days
• carrier: USPS
• service: USPS Ground Advantage
• type: Fixed

payments fueltanksysteme:

• wallet: Paypal
• credit card: Discover
• other

seller fueltanksysteme:

• city: Montgomery, Texas
• rating: 96.6%
• # reviews: 6537

offer fueltanksysteme:

• availability: In Stock
• sold: 0
• started: February 12, 2026
• options: Ship-to-home
• quantity: 1

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