Mitsubishi ASX Radiator: Specs, Fitment & Common Faults

A genuinely useful, specific diagnostic clue on related models: solid radiator hoses, boiling in the header tank, and temperature dropping with the heater on full together point toward a stuck thermostat.

Illustration for editorial purposes

OEM Part Numbers

Accuracy note: genuinely worth knowing: radiator hose connection points and mounting brackets on the ASX can differ subtly between facelifted and pre-facelift versions of the same generation, even when the core itself is unchanged.

The Part That Keeps Everything Else From Cooking

Nothing about this component is glamorous, but almost every serious engine failure that isn't wear-related traces back to a cooling system problem left unaddressed. Catching the early signs here is genuinely cheap insurance against a much bigger bill.

Before you buy: radiator size and design vary significantly by engine size, transmission type, and whether your car has air conditioning. Always confirm against your VIN before ordering.

What It Does

The radiator transfers heat from the engine coolant to the surrounding air, keeping engine temperature within a safe operating range. On automatic versions, it often also cools transmission fluid through a separate internal circuit — one more reason the correct part number matters so much here.

A Genuinely Useful, Specific Diagnostic Clue Worth Knowing

If you're facing overheating, this specific combination of symptoms, documented on related Mitsubishi models, is genuinely worth knowing about: both radiator hoses feeling solid rather than squishy, combined with visible boiling in the header tank, and the temperature temporarily dropping when the heater is switched on full, strongly points toward a stuck thermostat restricting coolant flow.

A genuinely important warning worth knowing: while an engine will technically still run without a thermostat, it will experience increased wear and coolant can flow through the radiator too quickly to cool properly — worth replacing a faulty thermostat properly rather than removing it as a supposed quick fix.

It's also genuinely worth knowing that if a cooling system has recently had a new radiator fitted, it's worth confirming a proper flush and bleed was actually carried out, since air trapped in the system can cause overheating unrelated to the new part itself.

Faults, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Radiator Guide for the three common failure modes, confirming fitment against your VIN, and OEM vs aftermarket guidance.

More Mitsubishi Radiator

The same part, covered across other Mitsubishi models.