Peugeot 208 Radiator: Specs, Fitment & Common Faults

A genuine diagnostic shortcut for RHD cars: 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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Peugeot 208 Radiator: OEM Part Number

Manual gearbox, all engines	Standard radiator with no transmission cooling circuit
Automatic (EAT6/EAT8), all engines	Genuinely uses a separate automatic transmission oil cooler, connected via pipes into the radiator's coolant circuit — confirmed shared across the wider PSA Group range (Peugeot and Citroen models sharing one common part number), not a tank built into the radiator itself

Accuracy note: genuinely worth knowing: radiator hose connection points and mounting brackets on the 208 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 208 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 208: 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— if you're having either replaced, confirming you're getting the current, updated part reference rather than an older superseded version is worth asking about directly, since this has been described by owners as a genuinely troublesome design that's been improved through revision.

Peugeot 208 Radiator: The Part That Keeps Everything Else From Cooking

Nothing about this component is glamorous, but on the Peugeot 208, 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.

Peugeot 208 Radiator: What It Does

The Peugeot 208'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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Peugeot 208 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.