Fiat 500 (Petrol) Radiator: Specs, Fitment & Common Faults
On the classic petrol 500, a cracking plastic thermostat housing spigot is genuinely the single most common cause of coolant leaks.
Illustration for editorial purposes
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Fiat 500 (Petrol) Radiator: OEM Part Number
| Manual gearbox, all engines | Standard radiator with no transmission cooling circuit |
|---|---|
| Dualogic (automated manual, where fitted) | Genuinely a robotised manual gearbox with an automated clutch rather than a true torque-converter automatic — it does not require the same dedicated transmission fluid cooling circuit as a genuine automatic, since mechanically it remains a manual gearbox underneath |
| 6-speed automatic (Aisin, where fitted) | A genuine torque-converter automatic that does need dedicated transmission fluid cooling, provided via the coolant circuit — confirmed as a completely different transmission from Dualogic, not just a different name for the same hardware |
Confirmed: The Single Most Common Cause of Coolant Leaks Worth Knowing — Fiat 500 (Petrol) Radiator
This is genuinely worth knowing before chasing coolant leaks in the wrong place: across numerous independently documented cases on related models, the single most common cause is a plastic spigot on the thermostat housing cracking with age. A pink or white crusty residue building up around the housing is the first visible warning sign, appearing well before an active drip.
It's also genuinely worth knowing a serious safety warning: this engine family is very prone to head gasket failure if run with low coolant, and this can happen before the overheat warning light illuminates. A bubbling sound heard from inside the car, particularly around the glovebox, has been reported as an early sign of a leaking thermostat housing.
Fiat 500 (Petrol) Radiator: The Part That Keeps Everything Else From Cooking
Nothing about this component is glamorous, but on the Fiat 500 (Petrol), 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.
Fiat 500 (Petrol) Radiator: What It Does
The Fiat 500 (Petrol)'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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Fiat 500 (Petrol) 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.