Ford S-Max Radiator: Specs, Fitment & Common Faults

Like the Galaxy, the S-Max's larger engines mostly avoid the 1.0 EcoBoost's documented cooling issue — but ageing plastic components are still worth checking.

Illustration for editorial purposes

Find Ford S-Max Radiator Here!

Opens live listings in a new tab.

OEM Part Number: DG938005AC (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 620152 / Valeo 701295

Accuracy note: Covers the Ford S-Max (2015-) 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)	Ava FD2689 (672 x 470 x 24 mm, mechanically jointed aluminium core, plastic tanks, fits 1.5 EcoBoost 160/165 PS and 2.0 TDCi 180 PS); Nissens 620152 (670 x 449 x 16 mm, soldered aluminium, plastic tanks, same engine family across Galaxy III and Mondeo V including 2.0 TDCi 120/150/180 PS); Valeo 701295; Denso DRM10121; NRF 59284; Van Wezel 18012714; Hella 8MK 366 307-801; Magneti Marelli 350213215800
Core sizes & variants	Early 2.0 TDCi and 1.5 EcoBoost cars take the 16-24 mm deep core; the 2.0 EcoBlue from 2018 takes the 26 mm deep Nissens 607230. All use 34 mm hose connections.
Genuine (OE) numbers quoted	1768469, 2066575, DG938005AC, DG938005AD (TDCi/EcoBoost); none quoted for the EcoBlue unit
Fitment notes	Nissens 620152 and 607230 are supplied with gaskets and seals. The S-MAX shares its radiators with the Galaxy III and Mondeo V, so quoting the engine code (T7/T8 TDCi or EcoBlue) is the quickest way to pick the right one.

Accuracy note: genuinely worth knowing: Ford sometimes fits a heavier-duty radiator as standard on S-Max trims with towing packs or higher-accessory-load options — worth confirming your exact spec rather than assuming the base-model rating applies.

The S-Max's Larger Engines Mostly Sidestep the 1.0 EcoBoost's Specific Cooling Issue

Like its Galaxy sibling, the S-Max has mainly been sold with larger 1.5 and 2.0-litre EcoBoost engines, or with a diesel — so the well-documented degas bottle (coolant reservoir) cracking issue affecting the smaller 1.0 EcoBoost across much of Ford's range generally doesn't apply here. Plastic cooling system components can still age and develop leaks over time regardless of engine size, so a thermostat housing or water pump leak is still worth checking on any higher-mileage S-Max.

Ford S-Max Radiator: The Part That Keeps Everything Else From Cooking

This isn't a part anyone gets excited about, but on the Ford S-Max, overlooked cooling problems are responsible for most serious engine failures that aren't simple wear-and-tear. Catching the early symptoms is about the cheapest insurance available against a major bill later.

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.

Ford S-Max Radiator: Watch: Replacing It

🎬 Watch: Ford Mondeo Mk5 2l Diesel Radiator Fit (sister (ford mondeo mk5))

Watch on YouTube ↗

Same CD4 platform as the 2015- S-Max; the only S-Max hits were older-gen cooling service and a Russian heater-matrix video.

Ford S-Max Radiator: What It Does

Keeping the Ford S-Max's engine temperature within safe limits comes down to the radiator's job of transferring heat from the coolant into the surrounding air. Automatic-gearbox versions often build in a second circuit for transmission fluid cooling too, which is exactly why fitting the wrong part number can cause two problems, not one.

Find Ford S-Max Radiator Here!

Opens live listings in a new tab.

Ford S-Max 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 Ford Radiator

The same part, covered across other Ford models.