MOPAR 3420846 Fuel Tank Sending Unit Body Wagon 2932963

( Manufacturer Part Number: 3420846 ), ( Type: Fuel Tank Sending Unit ), ( Ipn: 2932963 ), ( Universal Fitment: No ), ( Country Of Origin: United States )

Review MOPAR New Old Stock Fuel Tank Sending Unit B body Wagon Model's #3420846 fits 1968–1970

The **Mopar 3420846 Fuel Tank Sending Unit** is a precision-engineered component designed specifically for the 1968 through 1970 B-body Dodge Wagons, including models like the Dart, Coronet, and Polara, ensuring seamless integration with the vehicle s fuel system. This high-quality sending unit is crafted to provide accurate fuel level readings, allowing the vehicle s gauge to display real-time fuel availability with reliability and precision. Built to Mopar s exacting standards, this unit features a durable metal float arm and a robust, corrosion-resistant housing, making it well-suited for the demands of daily driving, including exposure to moisture, road debris, and varying temperatures. The sending unit operates on a variable resistor principle, adjusting electrical resistance as the float moves with the fuel level, sending a consistent signal to the fuel gauge for clear and dependable performance. Ideal for both restoration projects and routine maintenance, this part is a direct-fit replacement, eliminating the need for modifications or adapters, and is designed to match the original specifications of the vehicle s fuel tank assembly. Whether restoring classic charm or maintaining peak functionality, the **Mopar 3420846 Fuel Tank Sending Unit** delivers the dependability and accuracy drivers expect from a genuine OEM component.

The **Mopar 3420846 Fuel Tank Sending Unit** is a direct replacement part designed for 1968 1970 B-body wagons (such as the Dodge Dart, Plymouth Valiant, or Dodge Charger). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a Mopar 3420846 Fuel Tank Sending Unit**

1. **Direct Fitment and Compatibility**

The part is specifically engineered for your vehicle s year and model, ensuring proper installation without modifications. It matches the original sending unit s mounting points, wiring harness, and fuel tank interface, reducing the risk of installation errors.

2. **OEM Quality and Reliability**

Mopar (Chrysler s aftermarket division) uses high-quality materials and manufacturing processes similar to original equipment parts. This means it should perform as reliably as the factory unit, with fewer issues related to corrosion, electrical failure, or mechanical wear over time.

3. **Easy Installation**

Since it is a direct replacement, the sending unit should drop into place without requiring additional tools or adjustments beyond basic mechanical skills. The wiring and mounting are designed to align with the original setup, minimizing hassle during installation.

4. **Compatibility with Modern Gauges**

The sending unit s resistance output (typically 0 4 ohms for a 12V system) is consistent with modern fuel gauges, including aftermarket units. This ensures accurate fuel level readings without the need for gauge modifications.

5. **Warranty Coverage**

Mopar parts often come with a warranty (typically 1 year or more), providing peace of mind in case of defects. This is particularly useful if the unit fails prematurely due to manufacturing issues.

6. **Availability of Support**

Mopar offers customer support and technical resources, including part diagrams and installation guides. This can be helpful if you encounter any confusion during installation or troubleshooting.

7. **Cost-Effective Solution**

While not the cheapest option, the Mopar sending unit strikes a balance between price and quality. It is often more affordable than a fully rebuilt or remanufactured unit from specialty shops, yet avoids the potential pitfalls of no-name or low-quality aftermarket parts.

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### **Cons of buying a Mopar 3420846 Fuel Tank Sending Unit**

1. **Potential for Counterfeit or Low-Quality Units**

The aftermarket is rife with counterfeit Mopar parts, especially on platforms like eBay or Amazon. These fakes may not meet OEM standards, leading to premature failure, inaccurate gauge readings, or installation issues. Always verify the seller s reputation and purchase from authorized dealers or trusted suppliers (e.g., RockAuto, Summit Racing, or local Mopar stores).

2. **Limited Customization**

If you re looking for a sending unit with specific features (e.g., higher durability, digital compatibility, or extended warranty), the Mopar unit offers no such options. It is a straightforward replacement with no additional bells and whistles.

3. **Possible Stock Issues**

While not common, Mopar parts can occasionally be out of stock due to manufacturing delays or supply chain disruptions. This may require patience or alternative sourcing if you need the part urgently.

4. **No Built-In Diagnostics**

The sending unit itself does not provide diagnostic capabilities. If the gauge fails or the unit malfunctions, you ll need a multimeter to test resistance and continuity, which may require some technical knowledge.

5. **Compatibility with Aftermarket Gauges May Vary**

While most aftermarket gauges are compatible, there is a slight risk that a non-standard gauge (e.g., one with a different resistance range) could cause inaccuracies. Always check the gauge s specifications before purchasing.

6. **Potential for Corrosion or Wear in Older Tanks**

If your fuel tank has significant corrosion or internal debris, the sending unit may still fail prematurely. In such cases, cleaning the tank or replacing it entirely may be necessary alongside the sending unit.

7. **No Long-Term Durability Guarantee**

Like any mechanical component, the sending unit is subject to wear over time, especially if the fuel tank develops leaks or if the unit is exposed to moisture. While Mopar parts are reliable, they are not indestructible and may require replacement after several years or miles.

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### **Conclusion**

The **Mopar 3420846 Fuel Tank Sending Unit** is a solid choice for restoring or replacing the sending unit in your 1968 1970 B-body wagon. Its direct fitment, OEM quality, and ease of installation make it a practical solution for most owners. However, the risk of counterfeit parts and the lack of customization options are notable drawbacks. If purchased from a reputable source and installed correctly, it should provide reliable service and accurate fuel readings.

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### **Recommendation**

1. **Purchase from an Authorized Source**

Buy the part from a trusted dealer such as **RockAuto, Summit Racing, or a local Mopar parts store** to avoid counterfeit units. Verify the seller s reviews and return policy before purchasing.

2. **Inspect the Part Upon Arrival**

Check the sending unit for signs of wear, corrosion, or damage. Ensure the wiring harness is intact and the float mechanism moves smoothly. If anything seems off, contact the seller for a replacement.

3. **Follow Installation Guidelines Carefully**

Refer to your vehicle s service manual or the Mopar installation guide to ensure proper installation. Pay special attention to wiring connections and float alignment to avoid gauge inaccuracies.

4. **Test the Gauge After Installation**

After installing the new sending unit, verify that the fuel gauge provides accurate readings. Use a multimeter to check resistance as the float moves (it should vary between 0.5 4 ohms for a 12V system). If the gauge is still inaccurate, double-check connections or consider recalibrating the gauge.

5. **Consider Preventative Maintenance**

If your fuel tank is old, consider cleaning it or replacing it to prevent debris or corrosion from damaging the sending unit in the future. Regular fuel system maintenance (e.g., using fuel additives) can also extend the life of the sending unit.

6. **Keep a Backup Plan**

If you re unsure about installation or encounter issues, have a trusted mechanic inspect the work. Alternatively, consider purchasing a **remanufactured sending unit** from a specialty shop if you want extra assurance of quality.

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**Final Verdict:** The Mopar 3420846 is the best balance of quality, compatibility, and ease of use for your application, provided you source it carefully. It is a reliable choice for most owners, but always prioritize authenticity and proper installation to ensure long-term performance.

Details:

Dodge: Coronet, Coronet 440, 5 Deluxe, Crest wood station wagon only. Plymouth: Satellite, Sport Suburban, Beloved station wagon only. 5/16 inch hose size. Part Type: New Old Stock.

For 225, 318, and 383 cubic inch engines. Part # 3420846 Also 2932963, 3004181. For station wagon model's only. Fuel Tank Sending Unit.

Original old production type with brass float. Make: Dodge, Plymouth. Original Mopar part in original packaging.

part #: 3420846 prices

• $285.00-$295.00

specifications fueltanksysteme:

• for makes: Mopar
• for years: 1968-1970
• mpn: 3420846
• type: Fuel Tank Sending Unit
• ipn: 2932963
• universal fitment: No
• country of origin: United States

general fueltanksysteme:

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

returns fueltanksysteme:

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

seller fueltanksysteme:

• rating: 100.0%
• city: West Newbury, Massachusetts
• # reviews: 1496

offer fueltanksysteme:

• availability: In Stock
• quantity: 1
• started: April 2, 2026
• sold: 0
• options: Ship-to-home

shipping fueltanksysteme:

• service: FedEx Ground / FedEx Home Delivery
• transit: 2-5 Days
• class: Standard
• cost: $25.00
• type: Fixed
• carrier: FedEx

payments fueltanksysteme:

• other
• credit card: Diners-club
• wallet: Paypal

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