Renault Twingo Radiator: Specs, Fitment & Common Faults

On the Twingo, 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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OEM Part Number: 214101206R (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 637659 / Valeo 701194

Accuracy note: Covers the Renault Twingo (Mk3 2014-) as listed in the UK aftermarket catalogues. Radiators are sold by engine, gearbox and air-conditioning fitment, and one model usually has two or three different cores — a thicker core for diesels and automatics, a thinner one for small petrols — with different hose positions, so a radiator for the wrong engine will not connect up. The references below are UK aftermarket listings whose fitment lists name this generation, labelled by brand with the core size in mm; genuine numbers are those quoted against the listing. Check your engine code and whether the car has air conditioning against your VIN, and replace the coolant and bleed the system after fitting.

Radiators (aftermarket)	Nissens 637659 (480 x 397 x 16 mm, soldered aluminium core, plastic tanks, fits 0.9 TCe 90/95/110 H4B and 1.0 SCe 65/70/75); Valeo 701194; Denso DRM23113; Mahle CR 2232 000S; NRF 59274; Van Wezel 43012703; Hella 8MK 366 300-461; Magneti Marelli 350213208000. Nissens 637662 (480 x 397 x 16 mm, soldered aluminium core, plastic tanks, fits 1.0 SCe 65/70/75 only)
Core sizes & variants	Both cores are the same size with 28 mm connections, but they carry different OE numbers; 637659 covers the turbo and the non-turbo engines, while 637662 is for the 1.0 SCe only.
Genuine (OE) numbers quoted	214101206R, 8660006105 (637659); 214105514R, 8660006106 (637662); Smart 4535000103 / 4535000003 shared
Fitment notes	The radiators are shared with the Smart Fortwo and Forfour 453, including the electric versions.

Accuracy note: genuinely worth knowing: radiator core size and construction can differ between petrol and diesel Twingo 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.

A Genuinely Well-Corroborated Diagnosis Worth Knowing: The Thermostat Housing — Renault Twingo 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 Twingo Radiator: The Part That Keeps Everything Else From Cooking

Nothing about this component is glamorous, but on the Renault Twingo, 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.

Renault Twingo Radiator: Watch: Replacing It

🎬 Watch: #29 -Replacing radiator on Twingo Mk1 (older gen)

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Mk1 Twingo; nothing on the rear-engined Mk3 or its Smart Forfour 453 twin.

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 Twingo Radiator: What It Does

The Renault Twingo's 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.

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Renault Twingo 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.