Standard Ignition MAS0309 Mass Air Flow Sensor

Overview of Standard Ignition Mass Air Flow Sensor MAS0309

The Standard Ignition MAS0309 Mass Air Flow Sensor is engineered for precise air measurement in BMW and Land Rover vehicles. Designed to ensure accurate engine performance, this sensor supports models such as the BMW 540i, 740i, 740iL, X5, Z8, and the Land Rover Range Rover.

• Snap fit attachment method for secure installation
• Female oval connector with one connection point
• Durable plastic construction housing the sensor assembly
• Complete assembly with four bolt holes for mounting
• Five male blade terminals for reliable electrical connection

Detailed Product Description

The MAS0309 Mass Air Flow Sensor from Standard Ignition is a critical component in the emission control system, responsible for measuring the volume and density of air entering the engine. This sensor features a snap fit attachment method, allowing for straightforward installation without additional hardware. The sensor includes a single female oval connector designed to interface with the vehicle’s wiring harness, ensuring a secure and stable connection. Constructed from durable plastic, the sensor assembly does not include an external housing but is built to withstand typical engine bay conditions. The unit mounts using four bolt holes, providing a stable and vibration-resistant fit. Electrical connectivity is maintained through five male blade terminals, designed for consistent signal transmission.

Compatible Vehicles and Applications

This mass air flow sensor is compatible with select BMW and Land Rover models, including:

• BMW 540i
• BMW 740i and 740iL
• BMW X5 and Z8
• Land Rover Range Rover

It is designed to replace the original equipment sensor, ensuring proper air measurement for optimal engine management and emission control.

Common Issues Addressed by MAS0309 Sensor

• Irregular engine idling or stalling
• Reduced fuel efficiency due to inaccurate air measurement
• Check engine light triggered by faulty air flow readings
• Engine hesitation or poor acceleration
• Failed emissions tests related to air intake sensor faults

Installation Notes and Tips

• Ensure the snap fit attachment is fully engaged to prevent air leaks
• Verify the female oval connector is securely connected to the vehicle harness
• Use the four bolt holes to firmly mount the sensor in place
• Handle the sensor carefully to avoid damage to the plastic housing and terminals
• Consult vehicle service manual for torque specifications and sensor location

Quality Assurance and Warranty

Standard Ignition provides this MAS0309 Mass Air Flow Sensor as a complete assembly meeting OEM specifications. The sensor undergoes rigorous quality control to ensure reliable performance in BMW and Land Rover vehicles. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.