Home› Emission Control > Sensors› Karlyn 30351 Mass Air Flow Sensor
Karlyn 30351 Mass Air Flow SensorOE Quality 60-Day Returns
Part #: 30351

Karlyn 30351 Mass Air Flow Sensor

Bremi
⚙️ 121 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$136.90Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦Bremi
🚗Fitment: BMW, 640i, 640i Gran Coupe, 640i xDrive, 640i xDrive Gran Coupe, X5, X6, 535i GT, 535i GT xDrive, X3, 535i, 535i xDrive, ActiveHybrid 5, 740i, 740Li, 740Li xDrive, ActiveHybrid 7, X1, 135i, 135is, 335i, 335i xDrive, and 528i
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Mass Air Flow Sensor options

Overview of Karlyn Bremi Mass Air Flow Sensor 30351

The Karlyn Bremi Mass Air Flow Sensor 30351 is designed for precise air intake measurement in various BMW models. This sensor ensures accurate engine performance by monitoring the volume and density of air entering the engine.

  • Compatible with multiple BMW models including 135i, 335i, 528i, 535i, 640i, 740i, X1, X3, X5, and X6
  • Part number 30351 for exact replacement and fitment
  • Part of the Bremi product line, known for reliable emission control components
  • Measures mass air flow to optimize fuel injection and engine efficiency
  • Designed to meet OEM specifications for emission control sensors

Detailed Product Description

The Karlyn Bremi Mass Air Flow Sensor 30351 plays a critical role in the emission control system by accurately measuring the amount of air entering the engine. This data is essential for the engine control unit (ECU) to calculate the correct fuel-to-air ratio, which affects combustion efficiency and emissions. Compatible with a wide range of BMW vehicles such as the 135i, 335i xDrive, 535i GT xDrive, 640i Gran Coupe, 740Li xDrive, and ActiveHybrid models, this sensor supports both naturally aspirated and turbocharged engines. The Bremi line focuses on emission control sensors that meet stringent quality standards, ensuring consistent performance and durability.

Common Applications and Issues Addressed

  • Helps resolve rough idling and engine hesitation caused by inaccurate air flow readings
  • Prevents poor fuel economy linked to incorrect air-fuel mixture
  • Reduces engine stalling and misfires related to faulty mass air flow sensors
  • Supports emission compliance by maintaining proper sensor function
  • Eliminates check engine light triggers associated with air flow sensor faults

Installation Notes and Tips

  • Ensure the engine is cool before installation to avoid injury
  • Disconnect the battery to prevent electrical shorts during replacement
  • Locate the existing mass air flow sensor on the air intake system and remove carefully
  • Install the Karlyn Bremi 30351 sensor securely, ensuring proper electrical connections
  • Clear any diagnostic trouble codes after installation to reset the ECU

Quality Assurance and Warranty

The Karlyn Bremi Mass Air Flow Sensor 30351 is manufactured to meet OEM standards for emission control sensors. While specific warranty details are not provided, Bremi products typically undergo rigorous testing to ensure reliability and durability in demanding automotive environments.

This part fits 121 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2018BMW640iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2018BMW640i Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2018BMW640i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2018BMW640i xDrive Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2018BMWX5xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2018BMWX5xDrive35d3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2018BMWX5sDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2018BMWX6xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2018BMWX6sDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMW535i GTN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMW535i GT xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMW640iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMW640i Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMW640i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMW640i xDrive Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMWX3xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMWX5xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMWX5xDrive35d3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMWX5sDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMWX6xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2017BMWX6sDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMW535iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMW535i GTN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMW535i GT xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMW535i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMW640iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMW640i Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMW640i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMW640i xDrive Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMWActiveHybrid 5N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMWX3xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMWX5xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMWX5xDrive35d3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMWX5sDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMWX6xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2016BMWX6sDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW535iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW535i GTN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW535i GT xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW535i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW640iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW640i Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW640i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW640i xDrive Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW740iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW740LiN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMW740Li xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMWActiveHybrid 5N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMWActiveHybrid 7N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMWX1xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMWX3xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMWX5xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMWX5xDrive35d3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMWX5sDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMWX6xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2015BMWX6sDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW535iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW535i GTN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW535i GT xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW535i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW640iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW640i Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW640i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW640i xDrive Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW740iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW740LiN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMW740Li xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMWActiveHybrid 5N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMWActiveHybrid 7N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMWX1xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMWX3xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMWX5xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMWX5xDrive35d3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMWX5sDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2014BMWX6xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW135iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW135isN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW335iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW335i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW535iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW535i GTN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW535i GT xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW535i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW640iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW640i Gran CoupeN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW740iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW740LiN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMW740Li xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMWActiveHybrid 5N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMWActiveHybrid 7N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMWX1xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMWX3xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMWX5xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMWX5xDrive35d3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2013BMWX6xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMW135iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMW335iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMW335i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMW535iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMW535i GTN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMW535i GT xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMW535i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMW640iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMWActiveHybrid 5N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMWX3N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMWX5xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMWX5xDrive35d3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2012BMWX6xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMW135iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMW335iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMW335i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMW528iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMW535iN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMW535i GTN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMW535i GT xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMW535i xDriveN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMWX3N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMWX5xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMWX5xDrive35d3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2011BMWX6xDrive35i3.0LL6N/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi
2010BMW535i GTN/A4.33 Length; 3.35 Width; 2.56 Height; 1 Per Vehicule; Bremi

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Related Articles