Overview
The Crown Automotive 5003861AA is a fuel sending unit package that includes a pump, sending unit and filter. It fits the 1991–1995 Jeep Wrangler (YJ), and it is made for the 2.5L 4-cylinder and 4.0L 6-cylinder engines.
The sending unit reports fuel level from inside the tank to the fuel gauge, so the engine and Wrangler year need to match before ordering.
Key features
- Includes pump, sending unit and filter
- Named for 2.5L 4-cylinder and 4.0L 6-cylinder engines
- It fits 1991–1995 Jeep Wrangler (YJ) in Base, Islander, Renegade, Rio Grande, S, SE and Sahara trims.
- Crown Automotive part number 5003861AA
Fuel level sender basics
The sending unit is the float-and-arm assembly that reads fuel level and sends a signal to the dash gauge. Its arm can wear, the float can crack and the contacts can corrode, so a faulty unit often shows up as a gauge that reads empty too early, reads full or does not move. Testing the gauge circuit before replacing the sender avoids unneeded work.
A pump and filter assembly is commonly replaced at the same time as the sender, because both sit in the tank opening and are reached by the same access work. While the unit is out, inspect the tank for sediment and debris, and check the fuel lines and seal surfaces for wear.
Fuel system work carries fire risk. Relieve fuel pressure, disconnect the battery and work in a ventilated area away from sparks. Keep the tank opening clean so dirt does not fall into the tank during fitting.
- Test the gauge circuit before replacing the sender
- Inspect the tank for sediment
- Replace the strainer or filter with the pump
- Use a new tank seal on reassembly
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | 5003861AA |
| UPC | 848399031287 |
| Included | Pump, sending unit and filter |
| Engines | 2.5L 4-cylinder and 4.0L 6-cylinder |
Vehicle fitment
Fits the 1991–1995 Wrangler YJ in Base, Islander, Renegade, Rio Grande, S, SE and Sahara trims.
Other Wrangler years and Jeep models are outside this coverage. Match your vehicle’s year, model and trim before buying.
Installation notes
Confirm the engine is a 2.5L 4-cylinder or 4.0L 6-cylinder before fitting this pump and sending unit assembly.
What’s included
Pump, sending unit and filter.
