BMW 2 Series Radiator: Specs, Fitment & Common Faults

On the 2 Series, the water pump is genuinely often the first cooling component to fail on related models, typically costing £300-£500 to replace.

Illustration for editorial purposes

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OEM Part Number: 17118652495 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 606514 / Valeo 735467

Accuracy note: Covers the BMW 2 Series (F22 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 606514 (600 x 478 x 32 mm, aluminium core with plastic tanks, 220i and 230i B48/B46 2.0 petrol); Van Wezel 06012733; NRF 550254; AKS Dasis 050131N; Kamoka 7700296; Nissens 606863 (195 x 185 x 27 mm auxiliary radiator, M240i and M2); Denso DRM05077; Hella 8MK 366 309-961
Core sizes & variants	The main radiator for the 2.0 petrol F22 is the 600 x 478 mm core shared with the F30 3 Series and F32 4 Series. The six-cylinder M240i and M2, and the earlier 228i, carry a small secondary radiator in addition to the main one. The diesel 218d and 220d use a different main radiator not covered here.
Genuine (OE) numbers quoted	17118652495; 8652495; 17118652499; 8652499 (main radiator); 17118625447 (M240i/M2 auxiliary); 17117600697 (228i auxiliary)
Fitment notes	The main radiator has 38.5 mm hose connections and is supplied with gaskets and seals; the auxiliary units use 16.5 mm and 16.3 mm connections. BMW fits different radiators by engine, so check the engine code before ordering.

Accuracy note: genuinely worth knowing: automatic gearbox 2 Seriess typically need a radiator with a built-in transmission oil cooler that manual versions don't have — ordering the manual-spec part for an automatic car will fit, but won't cool the gearbox oil properly.

BMW 2 Series Radiator: The Part That Keeps Everything Else From Cooking

Unglamorous as it is, the BMW 2 Series's cooling system sits behind nearly every serious engine failure that isn't just ordinary wear — and one that went unaddressed for too long. Noticing early warning signs here is a small cost against a potentially very large one.

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.

BMW 2 Series Radiator: What It Does

On the BMW 2 Series, engine coolant sheds its heat into the passing air via the radiator, which is what keeps engine temperature in a safe working range. On automatics, it frequently pulls double duty cooling the transmission fluid through its own internal circuit — a detail that makes getting the exact part number right especially important.

BMW 2 Series Radiator: Watch: Replacing It

🎬 Watch: BMW F30 Radiator Replacement DIY (BMW N20 & N26 328i) (sister (bmw f30 3 series))

Watch on YouTube ↗

Same F2x/F3x front end and N20 engine as 228i; no F22-specific video found

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A Genuinely Honest, Real Cost Finding Worth Knowing — BMW 2 Series Radiator

This is genuinely worth knowing about the water pump specifically: it's often the first cooling system component to fail on related BMW models, typically lasting around 60,000 to 80,000 miles, with a replacement typically costing around £300 to £500 in the UK including parts and labour.

A genuinely alarming, honest finding worth knowing: because every part in the cooling system shares the same pressure, one component failing often reveals the next one waiting to happen shortly after, worth having the whole system properly inspected rather than replacing just the one failed part.

It's also genuinely worth knowing that BMW engines are generally designed to run hotter than many other brands, accelerating wear on plastic cooling components, worth considering preventative replacement around the 80,000 mile mark.

BMW 2 Series 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 BMW Radiator

The same part, covered across other BMW models.