Peugeot 3008 Radiator: Specs, Fitment & Common Faults

On the 3008, 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: 9809141780 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 636014 / Valeo 735555

Accuracy note: Covers the Peugeot 3008 (2016-) 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 636014 (650 x 433 x 18 mm, without gasket/seal); Nissens 636042 (648 x 408 x 26 mm, without cap, without expansion tank, with gaskets/seals); Nissens 606342 (650 x 433 x 26 mm, without cap, without expansion tank, with gaskets/seals); Valeo 735555 (650 x 433 x 18 mm, for vehicles without oil cooler); NRF 59302 (650 x 408 x 16 mm); NRF 59355 (648 x 408 x 26 mm); NRF 550261 (647 x 430 x 26 mm, with gaskets/seals); NRF 59302A (650 x 408 x 32 mm)
Core sizes & variants	650 mm wide EMP2 radiator; the 1.2 PureTech takes the 18 mm core and the diesels the 26 mm core.
Genuine (OE) numbers quoted	9809141780
Fitment notes	Same radiator family as the 308 II and C5 Aircross; the Hybrid4 has an additional cooling circuit not covered here.

Accuracy note: genuinely worth knowing: coolant capacity and radiator sizing on the 3008 tend to track engine displacement and power output closely — a part correct for a smaller-engined version of the same model can undersize the cooling for a larger-engined one.

A Genuine, Useful Diagnostic Shortcut for RHD Cars — Peugeot 3008 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 3008 Radiator: The Part That Keeps Everything Else From Cooking

It's an unglamorous part, but on the Peugeot 3008, the cooling system is behind almost every serious non-wear engine failure that could have been prevented. Spotting trouble here early is about as cheap an insurance policy as exists against a genuinely expensive repair bill.

Peugeot 3008 Radiator: Watch: Replacing It

🎬 Watch: Peugeot 308 radiator replacement without removing bumper T7 (sister (peugeot 308))

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Previous-gen 308 T7, not EMP2; nothing found for 3008 II or any EMP2 car

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 3008 Radiator: What It Does

On the Peugeot 3008, heat from the engine coolant is shed to the surrounding air through the radiator, keeping engine temperature in a safe range. On automatic gearboxes, it often doubles up, cooling transmission fluid through a separate internal circuit too — which is why getting the exact part number right matters more here than on a simple heat exchanger.

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Peugeot 3008 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.