Description Fleetguard AF4276 is a metal panel engine air filter with cellulose media for air intake systems. It is used as the primary air filter in Toyota Hilux and Fortuner models from 2015 onward with 2.4L 2GD-FTV or 2.8L 1GD-FTV diesel engines (GUN122R, GUN123R, GUN125R, GUN126R, GUN136R, GUN156R), replacing Toyota element 17801-0L040 and 17801-0L050. Cross-references include Mann-Filter C 33 017 and Ryco A1876.