Electrical

Fuel Tank Unit — CJ340

Fuel tank sender unit for the CJ340 Willys Jeep, supplied with its float arm and mounting gasket.

Fits	CJ340 · with float arm and gasket
Category	Electrical
Details	Sender unit with float arm, float and mounting gasket · Reports tank level to the fuel gauge
Also searched as	CJ340 fuel sender, Willys Jeep fuel level sender, aforador de combustible CJ340, boya de tanque
Condition	Export grade
Availability	Export — quote within 24 hours
Supplied by	Nonu Ventures

Contact Nonu Ventures →

Price, availability and shipping for this part are handled by Nonu Ventures, the exporter. The button opens this same part on their site.

This part is also listed for the Mahindra MM540: view the Mahindra MM540 page →

How the gauge is actually driven

A float on an arm moves a wiper across a resistance track as the level changes, and the gauge reads that resistance. Almost every fault is in that track — worn through at the positions the vehicle spends most of its life at, which is why a gauge often reads correctly when full and nonsense in the middle.

A gauge stuck on empty with a known-good tank is usually an open circuit in the sender or its wiring; one stuck on full is usually a short to earth. Both are worth testing before the tank comes out.

Fit it with a new gasket, and set the arm

The gasket is supplied with the unit. Use it rather than sealant — a sealed flange that has to come off again takes the flange with it, and fuel weeping at the top of the tank is not a fault to live with.

Check the float arm has not been bent in transit and that it swings through its full travel without touching the tank wall. An arm that fouls gives a gauge that stops moving partway down.

Questions about this part

What does the Fuel Tank Unit fit?

It is listed for the CJ340. Quote your chassis number when you enquire so fitment can be checked.

How do I order the Fuel Tank Unit?

Use the “Contact Nonu Ventures” button. Nonu Ventures is the exporter: send them the part number, the quantity and your destination and they quote within 24 hours, shipping worldwide.

Is it a genuine part?

Nonu Ventures lists genuine OEM or export-grade components, cross-referenced to OEM catalogues and fitment-checked before dispatch.

Does the Fuel Tank Unit also fit the Mahindra MM540?

Yes — Nonu Ventures lists it for the Mahindra MM540 as well. There is a separate Mahindra MM540 page for this part.

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CJ340 spare parts · All spare parts · Catalogue data from Nonu Ventures, checked 2026-10-20.