Urea Level Sensor / DEF Level Sensor for Truck Tanks
The urea level sensor — the DEF level sensor in North American terminology — is catalogued for the urea tank. This family holds 6 catalogued entries for Volvo and Scania applications.
Catalogued references include the Volvo level sensor set 21596909 / 21226079 / 21232204 / 21715211 / 20812620 (also referenced 351450) and the Scania sensors 1831371 and 2274870. Level senders are ordered against the tank they serve: the OE number and the truck model both go into the confirmation, and a sender listed for a different application is not treated as a substitute on the strength of the truck range alone. If the gauge behaviour is erratic rather than dead, note that in your inquiry, alongside the sender's OE number and the truck model.
Order by OE number, not by guesswork
A level sender is ordered against the tank it lives in as much as against the truck: send the OE number from the sender you removed — the catalogued examples are 21596909 for Volvo and 1831371 / 2274870 for Scania — together with the truck model and, if you know it, the tank size or tank part number. The match is confirmed against the sender's own entry, whose listed application is the authority; a sender carried on a different entry is confirmed against that entry, not assumed from the truck range. Say in the inquiry whether the gauge reads empty on a full tank or wanders, and include the sender's OE number and the truck model with it.
Fitment confirmation checklist
For a level sensor order, the tank is part of the specification: add the truck model and, if known, the tank size or tank part number, so the sender is confirmed against the tank it will serve. Say whether the fault is a sender reading empty on a tank known to be full, or readings that wander, and the confirmation will be made against the sender's listed application. Where a catalogue entry lists applicable models, that listing is what the confirmation is based on — if your exact model is not shown, the reply will say so plainly rather than stretch the fitment.
Packaging, stock and dispatch
A level sender is confirmed against a tank design, and all four packaging options are offered: branded OEMEMBER or UAP boxes for distributors listing the range, blue or white neutral boxes where the buyer keeps stock under an own label. On availability, the catalogue states that more than 100 items can be dispatched within 3 days and more than 2,700 within 15 days. Warranty terms are confirmed in the quotation before payment. Certificates are available upon request. Keep the confirmed sender reference with the tank it was confirmed for in your records and quote it back on any repeat order.
Frequently asked questions
What should I send when the DEF gauge fails?
Send the sender's OE number, the truck model and, if you know it, the tank size or tank part number. Note in the message whether the gauge reads empty on a full tank or the reading wanders — that detail is recorded with the confirmation, which is made against the sender's own entry. What a vehicle does when it cannot confirm the level is set by the maker's service information for that model.
Are Volvo and Scania level sensors interchangeable?
The entry data does not establish that they are interchangeable. The catalogued Volvo and Scania senders carry different references, and their entries do not establish that the two applications share a sender. Confirm the match for your tank by that OE number, checked entry by entry at inquiry.
Does the level sensor also measure urea quality or temperature?
The catalogue entries name the sender and the tank application they serve; they do not record whether a given entry also reports quality or temperature. State your truck model in the inquiry and include the old unit's OE number; the reply confirms the entry against them.
Gauge reading empty on a full tank? Send the sender number for a catalogue cross-check.
Send the OE number, vehicle model and engine — fitment is confirmed against the catalogue entry before any quotation. Samples and mixed-OE orders are welcome.