Never gets changed. We include small silicone to help seat the new seal.
Replace this seal at 100K to prevent dirt from entering your engine. 272273
M272 M273 Intake Filter Air Box to Mass Airflow Sensor
$11.80
SKU:
GEG-272273MASSEAL 
Product Details
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$389.00
2005 to 2013 M272 V6 100K Forget-Me-Not Complete Service Kit
Kent put together this DIY preventative 100K maintenance kit to improve reliability and increase life on your V6 engine.
These are all maintenance issues that a lot of shops miss. If you want your M272 to break down or lose performance after 100K, then just ignore these items. We are talking prevention here - not waiting until something breaks to fix it! This is a DIY SUPER KIT.