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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OEM Part Number: 133376 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 636002 / Valeo 735125

Accuracy note: Covers the Peugeot 208 (2012-2019) 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 636002 (380 x 398 x 23 mm, mechanically jointed aluminium core, plastic tanks, for cars without air conditioning, fits 1.4 VTi 95 PS, 1.6 VTi 120 PS, 1.6 THP 156/165 PS, 1.6 GTi 200/208 PS and 1.6 e-HDi 112 PS); Valeo 735125; Denso DRM07003; Mahle CR 2036 000S; NRF 53837; Van Wezel 40002298; Ava PEA2298; Hella 8MK 366 301-901
Core sizes & variants	The 380 x 398 mm core is the non-air-conditioned version. Cars with air conditioning, which is most UK 208s, take a larger core that was not confirmed, and the 1.2 PureTech and 1.4/1.6 HDi radiators also need a VIN check.
Genuine (OE) numbers quoted	133376; 133398; 1330W9; 1330S4
Fitment notes	Supplied with gaskets and seals, 28 mm connections. The same radiator fits the 207, C3 II and DS3, so check whether the car has air conditioning before ordering.

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.

Peugeot 208 Radiator: Watch: Replacing It

🎬 Watch: 2018 Peugeot 208 Cooling System Re-Fit

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Refits the cooling pack on a 2018 208 after accident repair; other 208 hits are heater matrix or coolant change.

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.