Jeep Wrangler: Cooling System / Cooling System — Drain, Flush And Refill

Coolant Checks

Check the engine, battery (if equipped), intercooler (if equipped), and Motor Generator Unit (MGU) (if equipped) coolant (antifreeze) protection every 12 months (before the onset of freezing weather, where applicable)...

Selection Of Coolant

NOTE: Mixing of engine coolant (antifreeze) other than specified Organic Additive Technology (OAT) engine coolant, may result in engine damage and may decrease corrosion protection...

Other information:

Jeep Wrangler 2018-2024 Owners Manual: Coolant Level

The coolant bottle provides a quick visual method for determining that the coolant level is adequate. With the engine OFF and cold, the level of the engine coolant (antifreeze) in the bottle should be between the ranges indicated on the bottle. The radiator normally remains completely full, so there is no need to remove the radiator/ coolant pressure cap unless checking for engine coolant freeze point or replacing coolant...

Jeep Wrangler 2018-2024 Owners Manual: Spare Tires — If Equipped

NOTE: For vehicles equipped with Tire Service Kit instead of a spare tire, please refer to “Tire Service Kit” in “In Case Of Emergency” for further information. CAUTION! Because of the reduced ground clearance, do not take your vehicle through an automatic car wash with a compact or limited use temporary spare installed...