Peugeot Partner Radiator: Specs, Fitment & Common Faults

On the Partner, which side a coolant leak comes from often tells you whether it's the water pump or thermostat housing — plus why "no puddle" doesn't mean no leak.

Illustration for editorial purposes

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OEM Part Number: 9800482380 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 636029 / Hella 8MK 366 311-651

Accuracy note: Covers the Peugeot Partner (2008-2018) 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 636029 (380 x 544 x 26 mm, soldered aluminium core with plastic tanks, fits 1.2 PureTech/THP 110, engine codes HNZ/EB2DT and HNV/EB2DTM); Valeo 735630 / 701174; NRF 59320 / 550113; Van Wezel 09012706; Hella 8MK 366 311-651; JDEUS M-0210570.
Core sizes & variants	This 380 x 544 mm radiator is confirmed for the 1.2 three-cylinder petrol Partner and Tepee, and the same unit fits the Berlingo B9 1.2, Peugeot 3008/5008 and Citroen C4 and DS models. The 1.6 HDi and BlueHDi Partner, by far the most common, uses a different radiator that is not confirmed here.
Genuine (OE) numbers quoted	9800482380; 1610824180
Fitment notes	Connections are 34.5 mm. For any diesel Partner the radiator should be ordered against the VIN.

Accuracy note: genuinely worth knowing: radiator hose connection points and mounting brackets on the Partner can differ subtly between facelifted and pre-facelift versions of the same generation, even when the core itself is unchanged.

A Genuine, Useful Diagnostic Shortcut for RHD Cars — Peugeot Partner Radiator

If you've found a coolant leak and can see roughly which side of the engine bay it's coming from, this is genuinely useful to know on a right-hand-drive UK car: a leak from the driver's side generally points to the water pump, while a leak from the passenger side generally points to the thermostat housing — both are common, well-documented failure points, and knowing which side narrows down the likely cause considerably before a garage even looks at it.

A genuinely important point worth knowing: these leaks don't always produce a visible puddle on the ground. Several owners report a coolant reservoir that empties gradually over days with no pool ever appearing underneath the car — the leak can be fine enough that it simply mists away once the engine reaches full temperature, evaporating before it ever reaches the ground. Don't take "no puddle underneath the car" as proof there's no leak; a steadily dropping coolant level with genuinely no visible pool anywhere is still worth investigating as a likely thermostat housing or water pump seal issue.

It's also worth knowing that both the water pump and thermostat housing have been revised by Peugeot over time — if you're having either replaced, confirming you're getting the current, updated part reference rather than an older superseded version is worth asking about directly.

Peugeot Partner Radiator: The Part That Keeps Everything Else From Cooking

This isn't a part anyone gets excited about, but on the Peugeot Partner, overlooked cooling problems are responsible for most serious engine failures that aren't simple wear-and-tear. Catching the early symptoms is about the cheapest insurance available against a major bill later.

Peugeot Partner Radiator: Watch: Replacing It

🎬 Watch: #2017 #Peugeot #Partner #vans #leaking #Radiator #replacement and #Citroen #Berlingo #vans

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2017 B9 Partner; alt https://www.youtube.com/watch?v=nkUJ30QHt2g

Peugeot Partner Radiator reference plate

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.

Peugeot Partner Radiator: What It Does

Keeping the Peugeot Partner's engine temperature within safe limits comes down to the radiator's job of transferring heat from the coolant into the surrounding air. Automatic-gearbox versions often build in a second circuit for transmission fluid cooling too, which is exactly why fitting the wrong part number can cause two problems, not one.

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Peugeot Partner 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 Peugeot Radiator

The same part, covered across other Peugeot models.