Mass airflow sensor allows the vehicle to detect of airflow entering the engine necessary for proper fuel mixture. Mass airflow sensor can easily be located beside the air intake box inside the engine bay. Made of good material, good performance and longer lifespan. This is a non- product, accessory ONLY! Part Number: A6519050500/6519050500 Size: 11.5x10.5x10cm / 4.53inch x 4.13inch x 3.94inch(L*W*H) Hole Diameter: 7mm / 0.28inch Pin Number: 4 Fit for: for CLA C117 2013-2018 for CLA Brake X117 2015-2018 for Brake X218 2012-2017 for GLA-Class X156 2013-2018 for GLC C253 2016-2018 for GLC X253 2015-2018 for W166 2015-2018 for -Class X204 2008-2015 for R172 2011-2016 for Sprinter 3.5-t 2006-2018 for Sprinter 3-t 2006-2018 for Sprinter 4.6-t 2006-2018 for Sprinter 5-t 2006-2018 for Dualiner W447 2014-2018 for Tourer W447 2014-2018 for W447 2014-2018 Colour:Black Material:ABS Package Contents: 1 Pcs Car Mass Air Flow Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.