Parts for your 2018 Mitsubishi Outlander-Radiator

2018 Mitsubishi Outlander Radiator

Technical sources confirm the 2018 Mitsubishi Outlander is fitted with a conventional liquid-cooled engine radiator. The Mitsubishi Motors Owner’s Manual for the 2018 Outlander details coolant checks and overheating procedures, the Mitsubishi Service Manual (Group 14A: Engine Cooling) describes the radiator, thermostat, and electric fan operation, and the Mitsubishi parts catalogue lists a dedicated radiator and fan shroud assembly for both petrol and PHEV variants. So yes—this vehicle absolutely uses a radiator.

In the Outlander, the radiator’s job is to shed heat from the engine coolant so the motor runs at the right temperature, even on hot Aussie or Kiwi summer days, towing up a hill, or crawling in traffic. Coolant flows through the engine, picks up heat, and the radiator and fans dump that heat to the air. Keeping it healthy protects head gaskets, alloy heads, and the automatic transmission cooler if it’s integrated into the same assembly.

As part of routine servicing, it pays to:

• Check coolant level and colour under the bonnet when the engine is cold. Top up only with the correct spec long-life coolant premix—don’t dilute quality with plain water.
• Inspect for dried coolant stains, damp end tanks, soft hoses, and a weeping water pump. Small leaks become big bills.
• Make sure the radiator cap seals properly and the overflow hose isn’t cracked. A tired cap can cause boil-over.
• Gently rinse bugs and debris from the fins. Avoid high-pressure washers up close—they bend fins and reduce airflow.

Coolant should be replaced at the interval in the Owner’s Manual (commonly around 5 years/100,000 km for long-life coolant in local conditions). A proper flush, fresh coolant, and correct bleeding to remove air pockets keep temps stable and the heater working. When a radiator is damaged, corroded, or the plastic end tanks are brittle, replacement is smarter than repeated stop-leak attempts. Choose a quality OEM-equivalent unit, if the vehicle tows or works hard, discuss heavy-duty options with the workshop. It’s also wise to renew the thermostat and cap during major cooling service, and check the condition of the fan(s) and relay operation. After any cooling work, monitor the gauge and heater performance over the next few drives. Look after the radiator and the Outlander will handle long kilometres without breaking a sweat.

What coolant does a 2018 Outlander use and how much does it need?

Mitsubishi specifies a long-life ethylene-glycol premix that meets the manufacturer’s requirements. Most local owners use the genuine blue long-life coolant. Capacity varies by engine and whether it’s a PHEV, expect roughly the mid-single-digit litres for petrol models. Always check the Owner’s Manual or the under-bonnet label and fill to the mark when the engine is cold.

How often should the radiator coolant be changed?

Follow the service schedule in the Owner’s Manual—typically around 5 years or 100,000 km in AU/NZ conditions for long-life coolant. Inspect level and condition at every service, if the coolant looks rusty, contaminated, or the radiator has been opened for repairs, replace sooner.

Is it safe to drive with a radiator leak or if the temperature light flicks on?

No. Stop as soon as it’s safe, switch off, and let it cool. Driving while overheating can warp alloy heads and damage the engine. Arrange a tow or roadside help rather than risking major repairs.