Mopar 68163849AB is the 50/50 premixed version of Mopar's 10-year/150,000-mile OAT coolant, the formula 2013–2018 JK manuals call for (MS.90032). Using the right coolant matters on the 3.6, where thermostat housing, water pump and oil cooler jobs all involve draining and refilling.
Fitment
2013–2018 JK and the JL/Gladiator, which call for Mopar 10-year/150,000-mile OAT. 2012 JKs use the 5-year/100,000-mile HOAT formula (68048953AB/AC). Don't mix them. Always confirm the number on your old part or run your VIN at a Mopar parts counter before you order.
Common failure symptoms
- Low coolant warning or level below the cold line
- Coolant color doesn't match the formula your Jeep should have
- Topping off after a thermostat, water pump or oil cooler repair
- Weak heat from air in the system after a refill
Cross-reference
| Brand | Part number | Notes | Source |
|---|---|---|---|
| Mopar (premix) | 68163849AB | 10-year/150k OAT, 50/50. | source |
| Mopar (concentrate) | 68163848AB | Same formula, concentrate. Mix with distilled water. | source |
| Mopar (2012 HOAT) | 68048953AB / AC | 5-year/100k formula for 2012 3.6 JKs. | source |
Rebuild, repair or replace?
Match what's in your Jeep. Premix is easiest for topping off or refilling after a repair, since you don't need to mix at the fender. After a refill, the 3.6 traps air. Raise the front and bleed with a spill-free funnel, or you can chase a P0128 or poor heat that isn't a parts problem.
Where to buy
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FAQ
Can I mix OAT and HOAT?
Don't. Match the formula already in the system, or flush completely.
Which one for a 2012 JK?
The 5-year/100k HOAT formula, 68048953AB/AC.
Does the JL use this coolant?
Yes, 2013-and-later JKs plus JL/JT use the 10-year/150k OAT formula.
Related guides
Sources
Part numbers and fitment were checked against the sources above on October 22, 2026. Mopar supersedes numbers over time. If a newer letter suffix shows up, it generally replaces the one listed here. Back to the parts lookup.