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How to Replace the Cabin Air Filter in a Smart 451

Model: Smart Smart 451 - Years: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
Part: Cabin air filter

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Video tutorial

Let's see how to change the cabin air filter in a Smart 451: The cabin filter is located on the driver's side, in the footwell, behind the accelerator pedal, where you'll find a small vertical compartment with a push-fit cover. In this compartment, you'll find the filter.

Simply remove it, and with a blast of compressed air or a clean cloth, clean the compartment to remove dirt and debris before placing the new filter in a clean compartment. Remember that the filter has a specific fitting direction: always with the arrows pointing towards the bottom of the compartment.

Close it properly, and the job is done.


Updated on 8 July 2026 by ScegliAuto


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