Description
Ford 7.3L Powerstroke OBS Fuel Filter FD-4595 (1995-1998)
The FD-4595 Fuel Filter is the correct cartridge-style replacement for 1995-1998 Ford 7.3L Powerstroke OBS (Old Body Style) trucks. This filter installs in the fuel bowl on top of the engine — the iconic "open the hood, change the filter in 10 minutes" design.
Specifications
| Part Number |
FD-4595 |
| OEM Cross-Reference |
F4TZ-9N184-A, Motorcraft FD-4595 |
| Filter Type |
Cartridge (installs inside fuel bowl, separate cap) |
| Fitment |
1995-1998 F-250, F-350 7.3L Powerstroke; 1995-1998 E-350 7.3L |
| Service Interval |
Every 15,000 miles |
OBS Powerstroke: The DIY-Friendly Generation
The OBS 7.3L is beloved for its simplicity. The fuel filter sits in an easily accessible fuel bowl on top of the engine. No crawling under the truck, no special tools — open the hood, unscrew the cap, swap the filter, done in 10 minutes.
FAQ
Q: My OBS Powerstroke dies randomly — could it be the fuel filter?
A: The #1 cause of random stalling on OBS 7.3Ls is the Cam Position Sensor (CPS), not the fuel filter. But a clogged filter can cause low-power complaints that feel similar. CPS failure = sudden stall, no restart until cool. Clogged filter = low power, possible stall under load.
Q: Do I need to fill the fuel bowl after changing the filter?
A: Yes. After installing the new filter and cap, fill the fuel bowl with clean diesel fuel before starting. This prevents extended cranking. Some owners also cycle the key 3-4 times to activate the fuel pump before starting.
