Subaru Crosstrek Radiator: Specs, Fitment & Common Faults

A genuinely useful piece of context worth knowing about Subaru's head gasket history: older EJ25-engined models had a well-documented issue with an extended warranty, plus a useful diagnostic technique for catching a leak a standard test might miss.

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OEM Part Numbers

Manual gearbox, all engines	Standard radiator with no transmission cooling circuit
Lineartronic CVT, standard engines	A genuine factory oil-to-water CVT fluid cooler is fitted as standard, using the same coolant that runs through the engine — confirmed by Subaru as functionally adequate for normal use, though the CVT's known heat-related reliability issues (which led Subaru to extend the powertrain warranty to 10 years/100,000 miles on many 2010-2018 vehicles) mean this cooler's condition and cleanliness genuinely matters
Turbo engines (XT/WRX and similar)	An additional auxiliary transmission cooler is fitted alongside the standard oil-to-water unit specifically because of the extra heat generated by the higher-output engine — not fitted on naturally aspirated variants

Accuracy note: genuinely worth knowing: radiator core size and construction can differ between petrol and diesel Crosstrek engines, and again between manual and automatic gearboxes where the automatic needs an integrated oil cooler circuit — confirm your exact engine code and transmission before ordering.

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.

Subaru Crosstrek Radiator reference plate

A Genuinely Useful Piece of Context Worth Knowing About Subaru's Head Gasket History — Subaru Crosstrek Radiator

If you're comparing against an older, EJ25-engined Subaru such as an older Forester or Outback, this is genuinely worth knowing: this older engine family has a well-documented history of head gasket seepage, with Subaru extending the warranty specifically covering this known issue on certain production dates, and documented cases seeing the gasket replaced completely free of charge. This doesn't directly affect this specific model, but is worth knowing as context on Subaru's broader engine history.

Worth knowing generally about diagnosing a suspected head gasket leak: a standard hydrocarbon or block test can sometimes give a false negative even when a genuine leak is present — using a no-spill coolant funnel fitted to the radiator cap opening while revving the engine and watching for bubbles has been documented catching leaks that a standard test missed.

It's also worth knowing that the complete absence of visible exhaust smoke or a coolant smell doesn't reliably rule out a head gasket leak on Subaru engines generally, since seepage can occur gradually without those more obvious symptoms being present.

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 Subaru Radiator

The same part, covered across other Subaru models.

Subaru Crosstrek Radiator: Specs, Fitment & Common Faults

OEM Part Numbers

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A Genuinely Useful Piece of Context Worth Knowing About Subaru's Head Gasket History — Subaru Crosstrek Radiator