Oil Level Sensor Mercedes W204 W212 Engine Oil Sensor OM651 A6511530032

Oil Level Sensor Mercedes W204 W212 Engine Oil Sensor OM651 is an original lubrication system component designed for precise monitoring of engine oil levels. Thanks to its factory origin from the Mercedes range, it ensures a perfect fit for OM651 units and proper integration with the vehicle's electronics. Using this component allows for an economical yet technically sound repair without the need for more expensive replacements.

Specifications and technical data

• SKU: A6511530032
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511530032
• Substitutable numbers: A6511530032, A 651 153 00 32
• Category: Hoses, Lines & Pipes

Purpose and function of the oil level sensor

The offered oil level sensor operates within the lubrication system of OM651 diesel engines used in Mercedes W204 and W212 class models. Its task is to continuously measure the oil level in the oil pan and transmit the signal to the engine control unit and the instrument cluster. A properly functioning oil level sensor allows for:

• early detection of low oil levels,
• protection of the engine unit against seizure,
• maintenance of stable engine operating parameters,
• reliable warning messages on the dashboard.

This provides the driver with clear information about the status of the lubrication system, which translates into safer vehicle operation.

Construction and fitment for the lubrication system

The oil level sensor is a component mounted in the lower part of the engine, in direct contact with the oil. The design has been developed for compatibility with OM651 units, which means a correctly selected length of the measuring element, proper sealing, and an electrical connector compatible with the wiring harness in Mercedes W204 and W212 models. As a result, installation is straightforward, without the need for wiring modifications or interference with the vehicle's electronics.

As an element from the Lines, hoses and pipes group, the sensor works with other lubrication and cooling system components, creating a coherent system that controls the flow and level of the working medium. Proper fitment with the oil pan and seal minimizes the risk of leaks and reading disturbances.

Benefits of using an original Mercedes sensor

Using an original oil level sensor in an OM651 engine offers a number of practical benefits:

• Full electrical compatibility – correct operation with the factory engine control unit and diagnostic system.
• Stable measurement parameters – proper signal characteristics, reducing the risk of false warnings about oil levels being too low or too high.
• Proper mechanical fitment – correct seating in the oil pan, without stress or leaks.
• Ability to use the existing electrical harness without additional adapters.

Using this component allows for lower repair costs while maintaining the manufacturer's original specifications, which is particularly important for modern engine units that are sensitive to the quality of sensor signals.

Condition, verification, and service application

The offered sensor comes from disassembly and has a used status, which means that before being put back on sale, it should be verified for tightness, reading accuracy, and the condition of the electrical connector. This type of component is particularly useful in situations where:

• messages about incorrect oil levels appear on the dashboard despite proper filling,
• there are problems with reading the oil level during diagnostics,
• mechanical damage to the oil pan and its associated components has occurred.

Replacing the oil level sensor is a standard service procedure, usually performed when accessing the lower part of the engine, often in conjunction with other lubrication system work.

Expansion of service work and related components

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as flexible lubrication system sections, return lines, or supply pipes, check the available parts in the Mercedes Lines, hoses and pipes category.

When planning broader work on the powertrain, it is also worth checking out educational materials regarding the cost-effectiveness of using secondary market components – the article Used gearbox – when is it worth it and what you need to remember may be helpful, as it discusses a practical approach to selecting used components in modern vehicles.