Peugeot 108 Radiator: Specs, Fitment & Common Faults

On the 108, 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: confirm via VIN — radiators (aftermarket) Nissens 606697 / Denso DRM50134

Accuracy note: Covers the Peugeot 108 (2014-) 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 606697 (374 x 352 x 27 mm, brazed aluminium with plastic tanks, 1.0 VTi); Denso DRM50134; Ava TO2764; Van Wezel 09012701; Magneti Marelli 350213203200; Diederichs DCM3948; AKS Dasis 210005N
Core sizes & variants	One small 374 x 352 mm core covers the 1.0 three-cylinder in all three badges.
Genuine (OE) numbers quoted	B000765280; 164000Q080
Fitment notes	28 mm inlet and outlet; seals are not listed as included.

Accuracy note: genuinely worth knowing: whether a 108 has air conditioning or a larger optional engine can change radiator sizing on some variants — fitment guides that only ask for model and year can still get this wrong, so cross-check the engine code where possible.

A Genuine, Useful Diagnostic Shortcut for RHD Cars — Peugeot 108 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 108 Radiator: The Part That Keeps Everything Else From Cooking

Few parts get less attention than this one, but on the Peugeot 108, a neglected cooling system is behind the vast majority of avoidable serious engine failures. Noticing the early warning signs costs nothing and can save a genuinely large repair bill down the line.

Peugeot 108 Radiator: Watch: Replacing It

🎬 Watch: CityBug Radiator Replacement,.. And 5 Snapped Bolts. C1/Aygo/107 Losing Coolant (sister (peugeot 107 / citroen c1 mk1))

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Previous-gen triplet; 108-gen layout is very similar.

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 108 Radiator: What It Does

On the Peugeot 108, coolant runs through the radiator to shed engine heat into the airflow, keeping temperatures in check. On many automatics, a separate internal circuit inside the same unit also cools the transmission fluid — one more reason a mismatched part number causes more than just a cooling problem.

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Peugeot 108 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.