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How to perform regular maintenance on a Smart fortwo

Model: Smart Smart 451 - Years 2007-2015
Part: Checks and maintenance

Let's see how to do the routine maintenance of a Smart 451: the main interventions are to change the air filter located in the engine compartment. We unlock the plastic clips that secure the box, lift the cover and remove the old filter. Check the mats on the bottom of the box, as they act as water drain valves: make sure they are positioned correctly; insert the new filter and close the cover. As for the spark plugs, disconnect the electrical connectors from the ignition coils, removing the bolt that secures each coil; extract them and remove the old spark plugs with an extension wrench. Then screw in the new spark plugs, initially by hand and then tighten them to 18 Nm. Reinsert the coils and reassemble everything. To change the oil and filter, take a short drive to warm up the oil; remove the oil pan plug, let it drain into a basin (we will then dispose of the oil and filter at an authorized center), clean the threads and put on a new plug; replace the filter, lubricating the gasket with clean oil and fill from the plug with motor oil of the type specified by the manufacturer. The cabin air filter is located under the windshield, on the passenger side, but it is not present on the "Pure" versions that do not have air conditioning.

Posted on 12 November 2025 by ScegliAuto

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