Fiat 500 Brake Discs: Specs, Fitment & Wear Symptoms

A genuinely important point specific to this electric model: regenerative braking means the mechanical discs see less use, which can paradoxically make them more prone to surface corrosion between uses.

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 Useful Piece of Context Worth Knowing About Fiat's Braking History

Conventional Fiat models, including the older petrol 500 and Panda, have a well-documented history of brake corrosion issues traced specifically to the caliper's reaction frame — the bracket the pads slide within — being made from a low corrosion-resistant grade of cast iron. This is worth knowing as context on Fiat's broader braking system history, though it's worth confirming with a specialist whether this specific design and its associated corrosion pattern applies to this electric model's braking hardware, since the underlying platform and components differ considerably from the older petrol range.

A genuinely important point worth knowing specific to this electric model: because regenerative braking handles the majority of everyday slowing, the mechanical brakes and discs see considerably less use than on an equivalent petrol car — and less use generally means less opportunity for the natural braking friction to polish away surface corrosion that would otherwise develop. Worth being aware that infrequent mechanical brake use, while good for pad longevity, can paradoxically make discs more prone to surface corrosion if the car sits for extended periods without genuinely hard braking to clean the surfaces.

It's also worth knowing that brake disc corrosion generally worsens on any car that sits unused for extended periods, since regular driving and braking naturally polishes surface corrosion away before it becomes established — worth bearing this in mind regardless of which specific braking system your car has.

Fiat 500 Brake Discs: The Part That Pads Depend On

On the Fiat 500, discs and pads work as a pair, and neglecting one tends to accelerate wear on the other — which is exactly why worn discs so often get discovered during what was meant to be a routine pad change.

Before you buy: disc size and design can vary by trim. Always confirm against your VIN before ordering.

Fiat 500 Brake Discs: Watch: Replacing It

🎬 Watch: How to Replace Front Brake Pads & Rotors on a Fiat 500 (2012-2019) (older gen)

Watch on YouTube ↗

Petrol/hybrid 500, not the 2020 electric 500e; no 500e front-brake video found

OEM Part Number: 155253667 (genuine front disc — confirm via VIN) — aftermarket front discs Brembo 09.5843.11 / Bosch 0 986 479 B43

Accuracy note: Covers the Fiat 500 (500e 2020 on) as listed in the UK aftermarket catalogues. Front brake discs are sold by diameter and thickness, and most models have two or three disc sizes depending on engine, brake size and trim — a 278 mm disc will not fit a car built with 300 mm brakes, so the caliper carrier and the disc must match. The references below are UK aftermarket catalogue listings for this generation, labelled by brand with diameter x thickness in mm; genuine numbers are shown only where a listing quotes one. Measure the old disc or check the brake size against your VIN before ordering, replace discs in pairs with new pads, and scrap any disc at or below its minimum thickness.

Front brake discs (aftermarket)	Brembo 09.5843.11 (257 x 22 mm, vented, 4 holes, coated, Prime line); Bosch 0 986 479 B43 (257.2 x 22 mm, vented, 4 holes, coated, ECE-R90); ATE 24.0122-0197.1 (257.5 x 22 mm, vented, 4 holes, coated); Zimmermann 230.2365.20 (258 x 22 mm, vented, 4 holes, coated, Coat Z); febi bilstein 22927 (257 x 22 mm, vented, 4 holes, coated); febi bilstein 43960 (281 x 26 mm, vented, 4 holes, coated); Valeo 186590 (257 x 22 mm, vented, 4 holes)
Disc sizes & variants	Two front sizes, 257 x 22 mm and 281 x 26 mm, both vented with four holes on a 98 mm bolt circle. The 257 mm disc is the fitment on the 95 hp version and the 281 mm disc on the 118 hp versions, including the 3+1. No solid front disc is listed.
Genuine (OE) numbers quoted	155253667 (genuine front disc number for this model — confirm via VIN, as several disc sizes exist)
Fitment notes	Minimum thickness is 20.2 mm for the 257 x 22 mm disc and 24.2 mm for the 281 x 26 mm disc. None of the front discs is drilled. Check the fitted size, as the two diameters share the same stud pattern.

Given the naming overlap with the older US electric 500, it's worth double-checking any listing explicitly confirms European FA1-chassis fitment, or cross-checking against your car's VIN, before ordering.

Fiat 500 Brake Discs: What They Do

Brake discs provide the surface the brake pads clamp against to slow the car, converting momentum into heat through friction. Regenerative braking handles much of everyday slowing on the electric 500, but the mechanical discs still need to be in good condition for hard braking and low-speed manoeuvring.

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Fiat 500 Brake Discs: Wear Symptoms, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Brake Discs Guide for warning signs to watch for, confirming fitment against your VIN, and choosing a reliable aftermarket disc.

More Fiat Brake Discs

The same part, covered across other Fiat models.