The fuel filter is inside the left frame rail and before starting it is necessary to buy new filter designed for specified engine. The fuel injection system filters are made to be high-pressure resistant ones, and as such they are only costlier than those of carbureted systems, which may explode if used under high pressure. Make sure that in the new filter the hairpin clips are replaced as reuse of the clips is discouraged. The front end of the vehicle should be at a higher level than the rear end to avoid siphoning of fuel, if it has the feature of Automatic Ride Control, the air suspension switch should be off before lifting the vehicle. Take off the cap of the gas and with the help of the screw driver check the fittings of the hose at the two ends of the filter for presence of dirt and if found clean them. Loosen the push-connect fittings on the filter it may require disconnection of bolts and a shield in some fewer models. Someone should also observe the arrow on the filter so that the new filter is fitted in the same position. The old filter can be released by turning the clamp-screw anticlockwise in order to receive the new filter, which has to be placed in the bracket according to the arrow with the clamp screw tight in clockwise direction. In some models, the filter may lock to a spring clip or two clips which are available on the head unit. Last of all, attach each of the hoses to the filter and switch on the engine to identify any case of fuel leakage.
