Suzuki Wagon R Manual page 2724

3) Check that filter is not excessively dirty, damaged or oily,
clean filter with compressed air from air outlet side of filter.
4) Install air cleaner filter and clamp upper case securely.
Air Cleaner Filter Replacement (Z13DT
Engine)
Replace air cleaner filter with new one according to steps 1), 2)
and 4) of inspection procedure.
Fuel Lines and Connections Inspection
Visually inspect fuel lines and connections for evidence of fuel
leakage, hose cracking and damage. Make sure all clamps are
secure.
Repair leaky joints, if any.
Replace hoses that are suspected of being cracked.
Fuel Filter Replacement (Z13DT Engine)
WARNING:
This work must be performed in a well ventilated area
and away from any open flames (such as gas hot water
heaters).
Replace fuel filter element in fuel filter assembly (1) with new one
referring to "Fuel Filter" in Section 6C3.
Water Draining of Fuel Filter (Z13DT Engine)
Bleed fuel filter of water referring to "Water Draining of Fuel Filter"
in Section 6C3.
MAINTENANCE AND LUBRICATION 0B-17