Two maintenance parts show up on almost every JK 3.6 job on this site: the coolant and the oil filter. Mopar 68163849AB is the 50/50 premix of the 10-year/150,000-mile OAT coolant that 2013–2018 JK manuals specify under MS.90032. Mopar 68191349AC, also called MO-349, is the cartridge oil filter for the flat-bottom housing, O-ring included.
The coolant matters because the thermostat housing, water pump, and oil-cooler jobs all drain the system. Topping a 2013–2018 JK with the older formula, or mixing leftover 2012 coolant into a later truck, is how a correct parts order still causes trouble. 2012 used the 5-year/100,000-mile formula. Do not treat the two as interchangeable.
The filter is the most common mix-up in the lookup. Early 2012–2013 housings take a nipple-style filter. A converted housing, or any 2014-and-later housing, takes this cartridge. The wrong filter in a converted housing can hold the bypass open. The part page spells out which housing gets 68191349AC.
What this category covers
- OAT coolant premix 68163849AB for 2013–2018 JKs
- Cartridge oil filter 68191349AC and the early-housing exception
- Which cooling and valley-housing jobs drain the system these parts refill
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 |
|---|---|---|
| Coolant, 10-Year/150,000-Mile OAT 50/50 Premix | 68163849AB | 2013–2018 JK and the JL/Gladiator, which call for Mopar 10-year/150,000-mile OAT. 2012 JKs use the... |
| Oil Filter, Cartridge (3.6 Pentastar) | 68191349AC | 2014–2018 JK 3.6 and 2018-and-later JL/Gladiator 3.6, per Mopar dealer listings. 2012–2013 JKs use the... |
When to replace
Change the filter at every oil change, and any time the housing is off. Use a new O-ring. The filter cap is 18 ft-lbs. Over-tightening is how the plastic housings crack. Use 68191349AC only on the flat-bottom housing it fits. Refill coolant with the same OAT formula when you drain for a housing, pump, or cooler job. If you do not know what is in the system, drain and fill rather than mixing an unknown jug with new OAT.
Safety
Coolant is poisonous, and a hot system is pressurized. Open the cap cold. Used oil is a skin irritant. Drain it before you pull the intake for a housing job. Do not mix coolant chemistries to stretch a bottle. If the oil looks milky, do not just change the filter. The cooler seal may be passing coolant into the oil, and that repair is on the engine page.
Related guides
Other systems
- JK Brakes & ABS
- JK Cooling
- JK Engine
- JK Steering & Suspension
- JK Heating & A/C
- JK Electrical
- JK Body & Doors
- JL Brakes & ABS
- JL Cooling
- 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.