Kenworth T300-T450 Fuel Tank Senders

Frequently Asked Questions About Kenworth T300-T450 Fuel Tank Senders

What does a fuel tank sender do?

The fuel tank sender is the component inside your fuel tank that monitors fuel level and sends that signal to your dash gauge. If your fuel gauge is reading inaccurately, stuck, or not moving at all, a faulty sender is often the cause.

How do I know if I have the correct sender for my Kenworth T300-T450?

Fuel tank senders can vary by tank shape, mounting configuration, resistance range, and the number of wire connections. Before ordering, check your truck's year, tank size, and existing sender's part number or mounting pattern to make sure the replacement matches. If you're unsure, our team can help confirm fitment based on your VIN or existing part.

Can I install a fuel tank sender myself, or do I need a mechanic?

Many owner-operators and shop technicians replace fuel tank senders themselves, since the job mainly involves draining or lowering fuel in the tank, removing the retaining ring or bolts, unplugging the wiring, and swapping in the new unit. That said, working around a fuel tank requires care, proper ventilation, and attention to safety, so if you're not comfortable with fuel system work, having a qualified mechanic handle it is a reasonable choice.

Why is my fuel gauge reading incorrectly even after replacing the sender?

If the gauge still reads wrong after installing a new sender, the issue could be a bad ground connection, a damaged wiring harness, a faulty dash gauge, or a sender that isn't matched to the correct resistance range for your gauge cluster. It's worth checking the wiring and connections before assuming the new sender is defective.

What material and quality should I expect from a replacement sender?

Fuel tank senders typically feature a float arm and resistor assembly housed in a mounting plate, often made from durable plastic or metal components designed to hold up inside the fuel tank environment. We carry senders built to match OEM specifications so they perform reliably and integrate with your existing gauge system.