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

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Mitsubishi ASX Radiator: OEM Part Number

Manual gearbox, all engines	Standard radiator with no transmission cooling circuit
Automatic/CVT, all engines	A dedicated transmission fluid cooler is fitted — either built into the radiator's tank or as a separate unit connected into the coolant circuit depending on exact model and generation — confirmed as a genuinely different radiator/cooling setup from the manual version, not interchangeable without the correct cooling circuit

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.

Mitsubishi ASX Radiator: The Part That Keeps Everything Else From Cooking

There's nothing exciting about this component, yet on the Mitsubishi ASX, most catastrophic engine failures that aren't simply down to wear trace back to a cooling problem someone ignored too long. Catching it early is cheap; catching it late usually isn't.

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.

Mitsubishi ASX Radiator: What It Does

The Mitsubishi ASX radiator's core job is moving heat out of the engine coolant and into the passing air, holding engine temperature within safe limits. Automatic versions frequently add a second internal circuit for transmission fluid cooling, which is exactly why the correct part number carries extra weight on this component.

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A Genuinely Useful, Specific Diagnostic Clue Worth Knowing — Mitsubishi ASX Radiator

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.

Mitsubishi ASX Radiator: 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.