Engine air filter replacement

Written By: AntonioTwingo
  • Comments: 0
Engine air filter replacement

Difficulty

Easy

Steps

5

Time Required

10 minutes

Introduction

Applicable to all engines (H4D and H4Bt).

Replace every: 20,000km or year. It should be replaced earlier if driving in dusty environments.

A clogged engine air filter may impact fuel economy: it will create more resistance and therefore, increase the pumping losses.

Note: recommendations are given according to the French RTA's (Revue Technique Automobile) maintenance plan, matching Smart 453's maintenance plan in this case.

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    • Open the trunk.

    • Put aside the trunk carpets.

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    • Unscrew the 6 T50 screws by hand or using a wrench and a socket.

    • Lift and put aside the engine hood.

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    • Unscrew the 2 Torx T25 screws.

    • Disglog the air filter lig by slightly pushing/pulling it forward then lifting it.

    • Extract the used air filter.

    • Dust off the air box from any debris residing in it.

    • Optionnal but recommended: proceeed to a throttle body, MAP sensor and air manifold thermometer cleaning (see other tutorials).

    • Install the new air filter.

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    • Replace the lid by sliding the two notches.

    • Screw back the two T25 Torx screws while maintaining a slight pression on the lid.

Conclusion

Congratulations ! You replaced your engine air filter

Author

AntonioTwingo

Member since: 24/08/22

6467 Reputation

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