>> How to replace the air filter on your smart fortwo
> Remove the Resonance Reservoir
The replacement of the air filter element involves first removing the resonance chamber.
- Pull up rear carpet and remove engine cover.
- Unclip vacuum hose (item 2) from holders on the bracket (item 3).
- Detach crankcase vent hose (item 4) from resonance reservoir (item 1).
- Loosen screw clamps (item 5) and detach resonance reservoir (item 1) from upper air filter housing (item 6) and from throttle valve actuator (item M16/6).
- Unscrew bolts (item 7) and remove resonance reservoir (item 1).
> Replace the Air Filter Element
To remove and replace the air filter element, remove the upper air filter housing.
- Release retaining clips (item 10).
- Remove upper air filter housing (item 9).
- Remove air filter element. Clean any debris from the lower air filter housing (item 11) with a rag.
- Install new air filter element ensuring element is properly centered within the housing.
- Install all removed parts in reverse order.
>> Additional Information
- The air filter element should be replaced every 2 years or 20,000 miles -- whichever comes first.
- A dirty air filter element can cause poor fuel mileage and allow dirt particles to enter your engine, which can reduce its life.
- Never drive your vehicle with the air filter element removed. Backfiring and harmful dirt ingestion may occur, which can reduce your engine life.
- Genuine smart parts will maximize your vehicle's performance.
- For further assistance, contact your nearest smart center.
- Find a smart center near you by going to www.smartusa.com