⚠️ Jeep manufacturer position
Wrangler underbody clearance and skid plates often require tank drop for full drain. TechAuthority is mandatory for JL EcoDiesel fuel system work.
Vehicle information
| Make | Jeep |
|---|---|
| Model | Wrangler |
| Market status | Sold new in the US 1986–present |
| Body styles | SUV (2-door, 4-door Unlimited) |
| Generations | JL (2018+); JK (2007–2018); earlier TJ/YJ |
| Engine options | Gasoline: 3.6L V6; 2.0L turbo I4 (2018+); 3.8L/3.6L earlier Diesel: 3.0L EcoDiesel V6 (select JL years) Hybrid: 4xe plug-in hybrid (gasoline ICE tank) |
| Fuel tank capacity | 21.5 gal (81 L) typical JL gasoline; varies by era |
| Fuel system | Gasoline port injection; EcoDiesel common rail; 4xe requires HV safety |
| Access method | Tank drop common on JL | Under-seat access on some earlier models |
| Anti-siphon | Yes |
| Service portal | Stellantis TechAuthority / Mopar |
Misfuel risk High
Off-road and rental Wranglers see frequent driver changes. EcoDiesel JL units are highly sensitive to gasoline contamination.
If the engine was not started
Do not start—especially on EcoDiesel. Drain before priming.
If the engine was started
Expect HPFP/injector inspection on EcoDiesel; gasoline engines may need injector cleaning if diesel was run.
Access procedure
- Relieve fuel system pressure and disconnect the negative battery cable.
- Drain accessible fuel through the pump module opening when OEM allows; otherwise prepare for tank removal.
- Raise the vehicle safely; support the fuel tank with OEM-approved equipment.
- Disconnect filler neck, vent, EVAP, and supply/return lines at the tank.
- Lower the tank and empty remaining fuel into approved containers.
- Flush or replace components per contamination severity and OEM limits.
- Reinstall the tank, reconnect all lines, and torque fasteners to specification.
- Refill, prime, and verify fuel pressure and leak-free operation (Jeep service information).
Notes
- Rubicon skid plates add labor to tank drop—budget time per OEM labor guide.
Related models
- Gladiator
- Bronco (competitor)
Frequently asked questions
What years did Wrangler offer EcoDiesel in the US?
Jeep sold the 3.0L EcoDiesel on select JL Wrangler model years in the US—not all trims. Verify fuel door labeling.
Does the Wrangler 4xe use gas?
Yes. The 4xe has a gasoline tank for its turbo four-cylinder engine plus a traction battery—follow HV disable before fuel repairs.
Is filler-neck siphoning OK on a Wrangler?
Not as a USIFDA certified standalone method. Use TechAuthority tank/module procedures.
Need professional misfuel recovery?
Find a certified operator or read consumer guidance for your next steps.
Find an operator Consumer guidance