Citroen C3 Brake Discs: Specs, Fitment & Wear Symptoms

Confirmed: a genuine Citroën Technical Bulletin fixes a specific rear brake sticking fault — plus an honest caveat, and a real consumer-rights point about aftermarket parts and warranties.

Illustration for editorial purposes

OEM Part Number: 4246X8

Accuracy note: C3 has used several disc sizes across generations and engines — always confirm your exact generation and engine before ordering.

Current/recent generations, front discs	266mm or 283mm diameter, vented, depending on engine — 26mm thickness, 24mm minimum for the larger size
Current/recent generations, rear discs	247mm or 249mm diameter, solid, 9mm thickness, 7.4-8mm minimum
Genuine cross-reference, rear disc (C3 I/Pluriel era)	OEM numbers: 4246X8, 4246W9, 424953, 424952

Confirmed: A Genuine Citroën Technical Bulletin Covers a Specific Sticking Fault — Citroen C3 Brake Discs

If you're experiencing a distinct crunch or clunk when pulling away after releasing the handbrake, this is genuinely worth knowing: Citroën has a documented Technical Service Bulletin covering exactly this fault, involving fitting steel brake shields to the rear discs. These shields are specifically designed to prevent mud, grit, and road debris from building up and binding against the disc, which causes the pad to bind slightly in the carrier and produces the characteristic crunch on release. Multiple owners confirm dealers fitting these shields under warranty once the fault was recognised — worth asking your dealer directly whether this fix has been applied to your car if you're experiencing this specific symptom.

An honest caveat worth knowing: the shields address the sticking and crunching symptom specifically, but don't necessarily solve the underlying rear disc corrosion problem — one owner who had the shields fitted still found the discs badly pitted, grooved, and rusted a few months later, describing it as "the worst I have ever seen" despite the shields being in place. If you're dealing with both symptoms, it's worth treating them as two separate issues rather than assuming the shield fix alone resolves everything.

It's also genuinely worth knowing your consumer rights here: fitting quality aftermarket discs and pads (Brembo is specifically and repeatedly recommended by owners as resolving the corrosion problem where standard-fit discs kept rusting) does not invalidate an extended warranty — warranty conditions relate to the car being serviced according to schedule, not to exclusively using manufacturer-branded parts, and a dealer cannot legally enforce a parts-only restriction as a condition of warranty coverage.

The Part That Pads Depend On

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 vary by trim, engine size and whether your car has the standard or "sport" brake package. Always confirm against your VIN before ordering.

What They Do

Brake discs provide the surface the brake pads clamp against to slow the car, converting momentum into heat through friction. Larger, sportier trims of the C3 typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.

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 Citroen Brake Discs

The same part, covered across other Citroen models.

Citroen C3 Brake Discs: Specs, Fitment & Wear Symptoms

OEM Part Number: 4246X8

Confirmed: A Genuine Citroën Technical Bulletin Covers a Specific Sticking Fault — Citroen C3 Brake Discs

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