Renault Clio Radiator: Specs, Fitment & Common Faults

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

Illustration for editorial purposes

OEM Part Numbers

Accuracy note: we weren't able to verify a confident Renault Clio radiator part number at the time of writing. Please confirm the correct part via a Renault dealer or parts specialist using your VIN.

A Genuinely Well-Corroborated Diagnosis Worth Knowing: The Thermostat Housing

If your Clio 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 considerably cheaper fix than the anxiety of an unexplained coolant leak might suggest.

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, rather than suggesting anything was wrong with how it was previously assessed.

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, particularly if you're being diligent about flagging it before it becomes a genuine overheating risk.

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.

Fitment & Compatibility

Radiators differ between manual and automatic versions of the Clio due to the transmission cooling circuit, and again across different generations. A radiator designed for a manual gearbox car will not correctly cool an automatic's transmission fluid even if it physically fits the mounting points. Always confirm the exact part number for your specific engine and transmission combination. Whether you're sourcing a replacement radiator for your Renault Clio from a dealer, specialist, or online marketplace, always check compatibility against your registration or VIN before buying.

Common Faults

Symptoms of Failure

Engine temperature gauge creeping up — often the earliest sign, especially noticeable in slow traffic or on long motorway runs.
Sweet-smelling smoke from the engine bay — a strong indicator of a coolant leak, usually from a cracked radiator tank or failed seal.
Visible coolant puddles under the front of the car — points to a leak that needs tracing back to its source before it causes overheating.
Milky discolouration in the coolant reservoir — can indicate a more serious internal issue where coolant and oil are mixing, requiring urgent inspection.

DIY Replacement Difficulty

This is a moderate-to-difficult DIY job, typically involving draining the cooling system, removing the front bumper or grille on some model years for access, and correctly bleeding air from the system afterward. Getting the bleed process wrong can cause airlocks that mimic a still-faulty radiator, so this is one job where following the exact procedure matters. Expect 2–3 hours for an experienced home mechanic, or roughly 1–1.5 hours of labour at a garage.

OEM vs. Aftermarket

OEM radiators are generally the safer choice given how directly this part affects engine longevity, though reputable aftermarket brands with genuine OEM-equivalent specifications are a reasonable, cheaper alternative. Budget unbranded radiators are where most repeat-failure complaints cluster — this is not a part worth cutting corners on.

More Renault Radiator Guides

The same part, covered across other Renault models.