Bremi 30121 Mass Air Flow Sensor

Bremi Mass Air Flow Sensor 30121

The Bremi New Mass Air Sensor 30121 is a direct-fit mass air flow sensor for select BMW applications. It is used to measure incoming air so the engine control system can manage fuel delivery and drivability with accurate airflow data.

Key Features

• Mass air flow sensor for emission control and engine management
• Bremi New Mass Air Sensor product line
• Fits select BMW M3, 323i, 323is, 328i, 328is, and 528i applications
• Part number 30121 for catalog and service matching
• Supports accurate airflow measurement for OE-style replacement needs

Vehicle Fitment

• Fits 1996-1999 BMW M3, N/A
• Fits 1998 BMW 323i, N/A
• Fits 1998 BMW 323is, N/A
• Fits 1996-1998 BMW 328i, N/A
• Fits 1996-1998 BMW 328is, N/A
• Fits 1997-1998 BMW 528i, N/A

Detailed Description

Bremi 30121 is a mass air flow sensor for BMW models that rely on precise intake-air measurement for proper engine operation. This Bremi New Mass Air Sensor is listed for 1996-1999 BMW M3, 1998 BMW 323i and 323is, 1996-1998 BMW 328i and 328is, and 1997-1998 BMW 528i. If you are searching for a BMW M3 mass air flow sensor, BMW 328i MAF sensor, or a Bremi 30121 replacement for a 528i, this part matches those applications.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Is Used For

• Incorrect airflow signal to the engine control unit
• Rough idle related to air metering faults
• Driveability issues tied to inaccurate intake-air readings
• Fuel mixture problems caused by a failing MAF sensor
• Check engine light conditions associated with airflow sensor faults

Installation Notes and Tips

Verify the part number 30121 against the original sensor before installation. Confirm the connector style, housing shape, and vehicle application on the BMW M3, 323i, 323is, 328i, 328is, or 528i before replacing the sensor. After installation, clear any stored fault codes and recheck engine performance.

Quality Assurance

Bremi New Mass Air Sensor 30121 is cataloged as an emission control sensor for the listed BMW applications and is intended for direct replacement use where the original fitment matches.