Standard Ignition MAS0390 Mass Air Flow Sensor

Overview of Standard Ignition Mass Air Flow Sensor MAS0390

The Standard Ignition MAS0390 Mass Air Flow Sensor is designed for precise air measurement in select BMW models. This sensor ensures accurate air intake readings, supporting optimal engine performance and emission control.

• Attachment Method: Snap fit for secure installation
• Connector Gender: Female with one round connector
• Terminal Type: Four male bullet terminals
• Number of Bolt Holes: Four for stable mounting
• Material: Durable plastic housing (housing not included)
• Complete assembly ready for installation

Detailed Product Description

The MAS0390 Mass Air Flow Sensor by Standard Ignition is engineered to meet the specifications of BMW vehicles including the 325i, 325is, 525i, 525iT, 530i, and M3 models. Featuring a snap fit attachment method, this sensor allows for straightforward installation without the need for additional hardware. The sensor includes a single female round connector and four male bullet terminals, ensuring reliable electrical connections. With four bolt holes, the sensor mounts securely to maintain consistent performance. Constructed from high-quality plastic, the sensor assembly is designed to withstand typical engine bay conditions. Note that the housing is not included, but the sensor comes as a complete assembly ready to replace your existing unit.

Compatible BMW Models and Applications

• BMW 325i and 325is
• BMW 525i and 525iT
• BMW 530i
• BMW M3

This mass air flow sensor is essential for accurate measurement of the air entering the engine, which directly affects fuel injection and engine management systems.

Common Issues Addressed by MAS0390 Sensor

• Erratic engine idling or stalling
• Reduced fuel efficiency and increased emissions
• Check engine light triggered by airflow sensor faults
• Poor acceleration or hesitation during throttle response
• Engine performance inconsistencies related to air intake measurement

Installation Notes and Tips

Installation of the MAS0390 sensor requires careful handling of the snap fit attachment to avoid damage. Ensure the female round connector is securely connected to the vehicle wiring harness. Verify that all four bolt holes align properly for stable mounting. It is recommended to inspect the surrounding air intake system for leaks or damage before installation. Proper installation will help maintain accurate sensor readings and engine performance.

Quality Assurance and Warranty

Standard Ignition provides this mass air flow sensor with a focus on OEM-level quality and fitment. The MAS0390 part number corresponds to a complete assembly designed to meet or exceed factory specifications. While specific warranty details may vary, Standard Ignition products typically include a limited warranty against defects in materials and workmanship to ensure reliability and customer confidence.