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Air filter change Ford Focus 2001 - 2005 Diesel 1.8 TDDi

OnDemand step-by-step maintenance & repair BETA

Ford Focus 2001 - 2005  | 1.8 TDDi Air filter change

  • time 5 to 45 minutes
  • difficulty 1
Caution: Never drive the vehicle with the air cleaner filter element removed. Excessive engine wear could result, and backfiring could even cause a fire under the bonnet.
1 The air filter element is located in the air cleaner assembly on the left-hand side of the engine compartment.
2 Remove the four screws securing the cover to the air cleaner housing (see illustration) .
Air filter cover screws
3 The cover can now be lifted, and the filter element removed (see illustration) . If preferred, the cover can be removed completely – this will allow a more thorough cleaning of the filter housing.
Lift the cover and remove the element, noting how it is installed
4 Loosen the clip and disconnect the air inlet duct from the mass airflow sensor on the air cleaner.
5 Disconnect the wiring from the airflow sensor.
6 Disconnect the breather hose leading to the cylinder head cover.
7 Withdraw the cover and remove the filter element, noting its direction of fitting.
8 If carrying out a routine service, the element must be renewed regardless of its apparent condition.
9 If you are checking the element for any other reason, inspect its lower surface; if it is oily or very dirty, renew the element. If it is only moderately dusty, it can be re-used by blowing it clean from the upper to the lower surface with compressed air. Because it is a pleated-paper type filter, it cannot be washed or re-oiled. If it cannot be cleaned satisfactorily with compressed air, discard and renew it.
Warning: Wear eye protection when using compressed air.
10 Where the air cleaner cover was removed, wipe out the inside of the housing. Check that no foreign matter is visible, either in the air intake or in the air mass meter.
11 Where applicable, before fitting the new filter, check and if necessary renew the PCV filter located in the base of the air cleaner.
12 Refitting is the reverse of the removal procedure, noting the following points:
  1. Make sure that the filter is fitted the correct way up (observe any direction-of-fitting markings).
  2. Ensure that the element and cover are securely seated, so that unfiltered air cannot enter the engine.
  3. Where removed, secure the cover with the screws, and ensure that the air inlet duct securing clip is fully tightened.
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