Does this sensor measure the engine oil level?

No. The references 16117285451 and 16117285452 are classified as right fuel level sensors in the BMW ETK catalog. The mention of motor oil in the supplier description is incorrect.

Do the two variants correspond to left and right?

No. Both references refer to the right sensor. Their selection depends on the mounting and motorization, to be verified using the VIN.

What is the difference between 16117285451 and 16117285452?

The consulted catalog associates 16117285451 with N20/N55 gasoline applications, and 16117285452 with B47/N57N diesel applications. This reference does not replace a verification of the complete reference for the vehicle.

Can I order reference 16117285450?

It appears in the supplier text but is not part of the offered variants. Its mention does not prove that it is interchangeable with 16117285451 or 16117285452.

Are the float and the harness illustrated with the sensor?

Yes. The four photos show the sensor with a metal arm, a float, and the wiring harness. A complete pump or a tank plate is not advertised with this product.

Are the resistance and dimensions of the sensor specified?

No resistance range, arm length, or float dimension is provided. These characteristics and the wiring must be verified using the vehicle reference and documentation.

Capteur de niveau de carburant avec support blanc, bras coudé, flotteur et faisceau multicolore

Ensemble capteur et flotteur présenté verticalement, avec connecteur blanc et cosses isolées

Vue opposée de l’ensemble de jauge montrant le boîtier noir, le bras métallique et le flotteur

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Vowenx · Motor components

Right fuel level sensor for BMW X3 F25 and X4 F26

This fuel level sensor with float is offered for certain BMW X3 F25 and X4 F26 models. Two variants, 16117285451 and 16117285452, correspond to installations that must be distinguished by the VIN, engine type, and the reference specified for the tank.

£70.49Available to order

Model: 16117285451

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Product details

This sensor is used to measure the fuel level in the tank of certain BMW X3 F25 and X4 F26 models. It is illustrated with its float, its metal arm, and its wiring harness. The two references offered concern the right-hand sensor; the engine oil level label in the supplier description is incorrect.

A gauge assembly with arm and float

The four photos show the sensor case, a bent metal arm, and a dark float. The opposite views detail the white support, the black case, the blue, red, and black wires, as well as the white connector and the insulated terminals. The shape of the arm and the position of the fasteners are useful references for comparing the old assembly.

The movement of the float accompanies variations in the level in the tank. The sensor provides the information used by the fuel indication system. The photos present this gauge assembly; a complete electric pump, a tank plate, or a closing ring are not advertised as included.

Two right-hand sensor references, to be selected separately

The BMW ETK manufacturer catalogue reproduced by Hubauer classifies 16117285451 and 16117285452 as right-hand fuel level sensors. These are two reference choices, without a left/right pair to be assembled.

Available variants and examples from the BMW catalogue
Variant	Documented examples, under VIN control	SKU
16117285451	X3 F25 20i/28iX with N20 engine; X4 F26 M40iX with N55 engine	2026344278-1
16117285452	X3 F25 18d/20dX with B47 engine; X4 F26 30dX with N57N engine	2026344278-2

These examples serve to differentiate the petrol and diesel references encountered in the catalogue; they do not validate all vehicles bearing these names. The reference 16117285450 cited in the description is not offered as a variant and should not be automatically equated with the two available choices.

Check the exact tank mounting

The supplier announces a global period 2011–2018 without detailing the versions. Identify the X3 by its F25 code and the X4 by its F26 code, then match the VIN to the expected reference. The fuel circuit configuration and vehicle equipment may affect this selection.

Checks before ordering
Point to note	Utility
VIN and engine	Determine the reference planned in the catalogue
Number of the removed sensor	Compare all digits, especially 451 or 452
Arm, float and support	Check the geometry and attachment points
Connector and wiring harness	Compare the keying, terminals and routing

Prepare the replacement and check of the gauge

The source announces a new part in plastic and metal. It gives neither the arm length, nor the float dimensions, nor the resistance range or wiring diagram. The wire colours are therefore not sufficient to define their electrical assignment.

Have the sensor and wiring harness checked before replacing the part for an incorrect level indication. Mounting in the tank requires respecting the vehicle procedure and preserving the freedom of movement of the float. After intervention, check the sealing of the access and the consistency of the level indication.

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Frequently asked questions

Does this sensor measure the engine oil level?
No. The references 16117285451 and 16117285452 are classified as right fuel level sensors in the BMW ETK catalog. The mention of motor oil in the supplier description is incorrect.
Do the two variants correspond to left and right?
No. Both references refer to the right sensor. Their selection depends on the mounting and motorization, to be verified using the VIN.
What is the difference between 16117285451 and 16117285452?
The consulted catalog associates 16117285451 with N20/N55 gasoline applications, and 16117285452 with B47/N57N diesel applications. This reference does not replace a verification of the complete reference for the vehicle.
Can I order reference 16117285450?
It appears in the supplier text but is not part of the offered variants. Its mention does not prove that it is interchangeable with 16117285451 or 16117285452.
Are the float and the harness illustrated with the sensor?
Yes. The four photos show the sensor with a metal arm, a float, and the wiring harness. A complete pump or a tank plate is not advertised with this product.
Are the resistance and dimensions of the sensor specified?
No resistance range, arm length, or float dimension is provided. These characteristics and the wiring must be verified using the vehicle reference and documentation.