Renault Kadjar Radiator: Specs, Fitment & Common Faults

On the Kadjar, a genuinely well-corroborated diagnosis: "95% chance it's the thermostat housing" — a cheap, common fix worth knowing.

Illustration for editorial purposes

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Renault Kadjar Radiator: OEM Part Number

Manual gearbox, all engines	Standard radiator with no transmission cooling circuit
Automatic/EDC dual-clutch, all engines	A genuinely separate water-oil heat exchanger cools the transmission fluid, distinct from both the radiator itself and the separate engine oil cooler also present on many of these engines — confirmed as three distinct cooling components working together, not one radiator doing all the jobs

Accuracy note: genuinely worth knowing: Renault radiator part numbers for the Kadjar frequently change mid-generation as engines are updated or facelifted, so a part valid for an early build year may not fit a later one even within the same model name.

A Genuinely Well-Corroborated Diagnosis Worth Knowing: The Thermostat Housing — Renault Kadjar Radiator

If your car has the 0.9 or 1.2 TCe engine and you're chasing a slow coolant leak, this is genuinely worth knowing directly: one owner's own assessment after extensive research put it plainly — "95% chance it is thermostat housing." This is a well-documented, common failure point on these engines, and genuinely good news on cost: one documented repair came to around £85-100.

A genuinely useful diagnostic insight worth knowing: a coolant leak that seems to disappear entirely over summer, then returns once temperatures drop in winter, is a real, documented pattern — rubber components expand slightly when warm, which can temporarily seal a very small crack or hole, only for it to re-open as the material contracts in colder weather. If your leak seems to have "fixed itself" only to return months later, this genuinely explains why.

It's also genuinely worth knowing you're not imagining a problem if this feels like a common complaint: multiple owners and independent motoring columns have confirmed that this generation of small turbocharged engines leaks coolant in significant numbers, and if a dealer is dismissive of a genuine, repeated coolant loss without a proper investigation, it's worth pushing back rather than accepting a simple "topped up, no fault found" response.

Renault Kadjar Radiator: The Part That Keeps Everything Else From Cooking

Few parts get less attention than this one, but on the Renault Kadjar, a neglected cooling system is behind the vast majority of avoidable serious engine failures. Noticing the early warning signs costs nothing and can save a genuinely large repair bill down the line.

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.

Renault Kadjar Radiator: What It Does

On the Renault Kadjar, coolant runs through the radiator to shed engine heat into the airflow, keeping temperatures in check. On many automatics, a separate internal circuit inside the same unit also cools the transmission fluid — one more reason a mismatched part number causes more than just a cooling problem.

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Renault Kadjar 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 Renault Radiator

The same part, covered across other Renault models.