BMW Z3M E36 E46 M3 Exhaust Oxygen Sensor L=750MM 1405324

BMW Z3M E36 E46 M3 Exhaust Oxygen Sensor L=750MM is a product from the Lambda sensors and O2 sensors category, designed for precise air-fuel mixture control in high-performance BMW models. This used, original exhaust sensor with a cable length of L=750 mm allows for maintaining factory engine performance parameters and stable exhaust emissions. It is a solution for users who expect a proven component with a design compliant with the manufacturer's specifications.

Specifications and technical data

• SKU: 1405324
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 1405324
• Substitutable numbers: 1405324, 11781405324, 0258003771, 0 258 003 771
• Category: Oxygen Sensors

Purpose and function in the exhaust system

BMW Z3M E36 E46 M3 Exhaust Oxygen Sensor L=750MM operates within the exhaust stream, monitoring oxygen content and transmitting a signal to the engine control unit. This enables real-time fuel mixture correction, which supports:

• maintaining stable engine operation across the entire RPM range,
• reducing fuel consumption while maintaining appropriate dynamics,
• proper catalytic converter operation and exhaust emission control.

Its placement in the exhaust section allows the sensor to analyze exhaust gas composition after the combustion process, which is crucial for adaptive control strategies in BMW M-series engines.

Construction, cable length, and installation aspects

The sensor belongs to the group of components referred to as Lambda sensors and O2 sensors, which means it utilizes an oxygen sensor integrated with a signal cable and an electrical connector. The cable length of L=750 mm facilitates routing the harness along the original installation path, without excessive stretching of the wires and without the need for interfering with factory mounts.

Such a solution promotes proper cable shielding, minimizes the risk of signal interference, and simplifies installation in the engine bay and undercarriage, especially in the tightly packed BMW Z3M, E36, and E46 M3 models.

Benefits of using an original BMW lambda sensor

Using an original BMW component to replace a worn-out lambda sensor allows for restoring factory engine characteristics without the need for installation modifications. Key advantages include:

• compatibility with the factory engine control unit – no need for harness adaptation or software changes,
• stable output signal, supporting smooth operation at idle and under load,
• possibility of reducing diagnostic errors related to the fuel mixture and catalytic converter.

For users who intensively drive their BMW on the road or track, a properly functioning lambda sensor is an essential element for maintaining consistent performance and predictable throttle response.

Condition, verification, and selection by part numbers

The offered item is in used condition, allowing for an economical restoration of the mixture control system's efficiency while maintaining the original design. Before installation, it is recommended to perform a standard check of the electrical system and exhaust system tightness to fully utilize the sensor's potential.

The selection of this sensor for a specific BMW version should be based on the OEM part number and available interchangeable numbers – their full list can be found in the technical specifications section. This allows for precise verification of compatibility with a specific engine variant and vehicle model year.

System expansion and additional information

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other items from the same group, such as additional sensors, oxygen sensors, or exhaust measurement components, check the available parts in the BMW Lambda sensors and O2 sensors category.

When deciding to purchase a used electronic component, it is worth familiarizing yourself with practical tips regarding the selection and operation of such components – detailed advice can be found in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.