Gino---
The cabin filter is not standard in any F-150 from the factory....it is a Dealer Installed Option (DIO). Once installed, the filter needs to be changed every 15,000 miles or 1 year (more often if in dusty conditions).
The reason I installed mine is that I rarely drive with my windows down and wanted to keep the cabin cleaner. Well, it is MUCH cleaner now. The cabin filter is not very useful if the windows are down most of the time.
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2000 F-150 XLT, 4x2, 5.4L Supercab, Styleside, Black with silver two-tone, 3.55, class III towing package with heavy duty cooling package, 4 wheel disk ABS, overhead console, sliding rear window, keyless entry, dark graphite interior, in dash CD, Pendaliner bedliner, K&N air filter, rubberized undercoating, cabin filtration system, Bugflector II, 5W-30 Mobil 1, engine build 10/4/99
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