JL 3.6 cooling parts are not JK parts with a new badge. The thermostat housing is Mopar 4893926AH, thermostat included. The water pump for trucks without eTorque is Mopar 4893941AD, which replaces 4893941AC and AB. The JK housing 5184651AJ and the Dorman 902-852 do not fit the JL. That mix-up is why this page is separate.
The JK plastic housing is a famous leaker, so a JL owner searching for a thermostat housing lands on JK numbers. Confirm the truck before you order. eTorque is a further split on the pump: 4893941AD is the non-eTorque number, and eTorque trucks use the 4893942 series. If you are not sure which one you have, check the VIN before you buy.
Year listings for 4893941AD do not agree with each other. Catalogs cover anywhere from 2018 to 2026 non-eTorque 3.6 JLs, depending on the source. Confirm by VIN. FCA's 2024 parts note tells dealers to inspect before replacing a pump in this family, because some residue at the weep hole is normal. A stain is not automatically a failed pump. Dripping is. The 3.6 still traps air, and JL trucks use the 10-year/150,000-mile OAT coolant, the same family as premix 68163849AB.
What this category covers
- Thermostat housing 4893926AH for the JL 3.6
- Water pump 4893941AD for non-eTorque JL 3.6s, and the 4893942 series used on eTorque
- The JK housing and pump numbers that do not interchange
Parts in this category
Each row links to the child part page for that SKU: the current Mopar number, what it supersedes, aftermarket cross-references, failure symptoms, and whether to rebuild or replace. Every number on those pages cites a source.
| Part | Mopar # | Fits |
|---|---|---|
| Thermostat Housing Assembly (JL 3.6) | 4893926AH | 2018-and-later Wrangler JL with the 3.6 Pentastar, per Mopar parts catalogs. It's a different housing from the... |
| Water Pump (JL 3.6, non-eTorque) | 4893941AD | 2018-and-later JL Wrangler 3.6 without eTorque. Sources disagree on model years: MoparPartsGiant lists the... |
When to replace
Replace the housing as an assembly when it is leaking or the thermostat is the confirmed fault. Do not install a JK housing to save a day of shipping. Inspect the pump before you replace it. Residue at the weep-hole plug can be normal. Dripping is not. Pressure-test when you are unsure. The pump is not a home rebuild. Refill with the OAT coolant the truck already uses and bleed the system. eTorque pump work is a different part and a different procedure.
Safety
Open the cooling system cold. eTorque trucks add a belt-starter and a 48-volt pack to the same engine bay. If you are not sure whether the Jeep is eTorque, identify it before you unplug anything near the pump. Do not probe orange high-voltage cables. A housing swap on a non-eTorque 3.6 is ordinary cooling work. Anything on the 48-volt side is dealer or qualified-tech work.
Related guides
Other systems
- JK Brakes & ABS
- JK Cooling
- JK Engine
- JK Steering & Suspension
- JK Heating & A/C
- JK Electrical
- JK Body & Doors
- JK Fluids & Filters
- JL Brakes & ABS
- JL Engine
- JL Steering & Suspension
- JL Electrical
- JL Fluids & Filters
Part numbers change as Mopar supersedes them. Match the number on your old part, or run the VIN at a Mopar counter, before you order. Back to the parts lookup.