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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OEM Part Number: 214104EA0A (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 637665 / Valeo 735624

Accuracy note: Covers the Renault Kadjar (2015-) 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 637665 (539 x 468 x 16 mm, aluminium core with plastic tanks, fits 1.5 dCi 110 K9K 646-677 and 1.5 Blue dCi 115 K9K 872/873); Valeo 735624 (489 x 540 x 18 mm, aluminium core with plastic tanks, fits 1.2 TCe 130 H5F 408); Nissens 637663 (petrol); Valeo 735625 (diesel); Denso DRM46062 (diesel) and DRM46063 (petrol); Mahle CR 2241 000S (diesel) and CR 2240 000S (petrol); NRF 59254 (diesel) and 59275 (petrol); Van Wezel 13012703 (diesel) and 13012704 (petrol).
Core sizes & variants	The diesel radiator (OE 214104EA0A / 214107399R) is a 16 mm core shared with the Nissan Qashqai J11 1.5 dCi and 2.0 petrol. The 1.2 TCe petrol takes a different 18 mm core (OE 214101527R), shared with the Qashqai J11 1.2 DIG-T.
Genuine (OE) numbers quoted	214104EA0A; 214104EA1A; 214107399R; 214101527R
Fitment notes	Both radiators have 35 mm inlet and outlet connections; Order by engine code, as the petrol and diesel radiators are not interchangeable.

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.

Renault Kadjar Radiator: Watch: Replacing It

🎬 Watch: How to Replace Radiator 2014-2020 Nissan Rogue (sister (nissan x-trail/rogue t32))

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Kadjar sits on the same CMF-C/D platform; Qashqai J11 only had a Russian rad video fXvTgaVS2n4

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.