Fiat 500 Radiator: Specs, Fitment & Common Faults

A genuinely important distinction: this electric model has an entirely different cooling arrangement from the petrol range's well-documented thermostat housing issue — with separate battery and motor cooling loops instead.

Generation covered: this guide is for the fully electric Fiat 500 (2020–present), with particular focus on 2020–2023 registered examples now old enough for parts to be a common search. This is an entirely different car from the previous petrol 500 (2007–2024), sharing no mechanical parts with it despite the similar styling — check your logbook or VIN if you're unsure which one you have.

Illustration for editorial purposes

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A Genuinely Important Distinction Worth Knowing on This Electric Model

This is genuinely worth knowing before applying advice aimed at the older petrol 500 to this car: the conventional Fire and TwinAir petrol engines used in the rest of Fiat's small car range have a well-documented history of coolant leaks from a cracking plastic thermostat housing spigot — but this electric model has an entirely different cooling arrangement, typically including a dedicated loop for the battery pack and another for the motor and power electronics, rather than a single engine cooling system built around a thermostat housing. It's worth confirming with a specialist or dealer exactly which cooling circuits your specific car has and how they're structured, rather than assuming the older petrol model's well-known thermostat housing fault applies here.

Worth knowing about coolant system health on an electric vehicle generally: the battery cooling loop plays a genuinely important role in both performance and battery longevity, since a battery that runs too hot or too cold can see reduced range and, over time, accelerated degradation — worth having this system checked as part of routine servicing rather than assuming an EV genuinely has no cooling-related maintenance needs at all.

It's also worth knowing that coolant loss on any vehicle, electric or otherwise, is worth investigating promptly rather than simply topping up repeatedly, since a slow leak that isn't addressed can eventually affect a system's ability to properly regulate temperature when it's needed most.

Fiat 500 Radiator: The Part That Keeps Everything Else From Cooking

Unglamorous as it is, the Fiat 500'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.

Fiat 500 Radiator: Watch: Replacing It

🎬 Watch: FIAT 500 - How to replace coolant radiator / blower motor - DIY (older gen)

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Petrol 500 (2007-), not the electric 500e platform; no 500e radiator video exists yet

OEM Part Number: 52150725 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 606869 / NRF 550315

Accuracy note: Covers the Fiat 500 (500e 2020- (if absent use 500 2007-)) 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)	NRF 550315 (606 x 394 x 26 mm, aluminium with soldered fins, fits the 70 kW and 87 kW electric motors and the 3+1 body); Nissens 606869; Hella 8MK 366 308-131; Prasco FT034R001; Vemo V24-60-0065.
Core sizes & variants	One radiator serves the whole 500e range, hatchback, 3+1 and Convertible, in both 95 hp and 118 hp outputs, plus the 155 hp Abarth 500e. This is the battery and drive-unit cooling radiator; the petrol 500 (312) uses a different part.
Genuine (OE) numbers quoted	52150725; 46348460 (Fiat); 46354481 (Abarth)
Fitment notes	NRF supplies this with a three-year commercial warranty; connection sizes are not published, so compare hose stubs with the old unit before fitting.

Genuinely worth knowing: radiator specification depends on engine and transmission type — confirm your exact engine code before ordering, and be aware that US-market Fiat 500e listings use a different parts catalogue system to the European FA1-specific range.

Electric 500 owners on forums (discussing the broader 500e platform family) describe two separate cooling circuits — one dedicated to the power electronics (motor, inverter, charger) and a second, independent circuit for the battery, which can be electrically heated or actively chilled by the air conditioning system. While this describes the general architecture rather than confirmed identical detail for the European FA1-chassis car, it's worth being aware there may be more than one "radiator" involved before assuming a single part covers the whole cooling system.

Fiat 500 Radiator: What It Does

On the Fiat 500, 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.

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Fiat 500 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 Fiat Radiator

The same part, covered across other Fiat models.