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

OEM Part Numbers

Accuracy note: we weren't able to verify a confident Peugeot 208 radiator part number at the time of writing. Please confirm the correct part via a Peugeot dealer or parts specialist using your VIN.

A Genuine, Useful Diagnostic Shortcut for RHD Cars

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— if you're having either replaced, confirming you're getting the current, updated part reference rather than an older superseded version is worth asking about directly, since this has been described by owners as a genuinely troublesome design that's been improved through revision.

The Part That Keeps Everything Else From Cooking

Nothing about this component is glamorous, but 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.

What It Does

The 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.

Fitment & Compatibility

Radiators differ between manual and automatic versions of the 208 due to the transmission cooling circuit, and again across different generations. A radiator designed for a manual gearbox car will not correctly cool an automatic's transmission fluid even if it physically fits the mounting points. Always confirm the exact part number for your specific engine and transmission combination. Whether you're sourcing a replacement radiator for your Peugeot 208 from a dealer, specialist, or online marketplace, always check compatibility against your registration or VIN before buying.

Common Faults

Symptoms of Failure

Engine temperature gauge creeping up — often the earliest sign, especially noticeable in slow traffic or on long motorway runs.
Sweet-smelling smoke from the engine bay — a strong indicator of a coolant leak, usually from a cracked radiator tank or failed seal.
Visible coolant puddles under the front of the car — points to a leak that needs tracing back to its source before it causes overheating.
Milky discolouration in the coolant reservoir — can indicate a more serious internal issue where coolant and oil are mixing, requiring urgent inspection.

DIY Replacement Difficulty

This is a moderate-to-difficult DIY job, typically involving draining the cooling system, removing the front bumper or grille on some model years for access, and correctly bleeding air from the system afterward. Getting the bleed process wrong can cause airlocks that mimic a still-faulty radiator, so this is one job where following the exact procedure matters. Expect 2–3 hours for an experienced home mechanic, or roughly 1–1.5 hours of labour at a garage.

OEM vs. Aftermarket

OEM radiators are generally the safer choice given how directly this part affects engine longevity, though reputable aftermarket brands with genuine OEM-equivalent specifications are a reasonable, cheaper alternative. Budget unbranded radiators are where most repeat-failure complaints cluster — this is not a part worth cutting corners on.

More Peugeot Radiator Guides

The same part, covered across other Peugeot models.