Citroen C5 Aircross Brake Discs: Specs, Fitment & Wear Symptoms

On the C5 Aircross, a genuine Citroën Technical Bulletin fixes a specific rear brake sticking fault — plus a real consumer-rights point about aftermarket parts and warranties.

Illustration for editorial purposes

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OEM Part Number: confirm via VIN — front discs (aftermarket) Brembo 09.B929.11 / Bosch 0 986 479 A89

Accuracy note: Covers the Citroen C5 Aircross (2018-) 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.B929.11 (330 x 30 mm, vented, 5 holes, coated, high-carbon); Bosch 0 986 479 A89 (304 x 28 mm, vented, 5 holes, coated, high-carbon, ECE-R90); TRW DF6419 (304 x 28 mm, vented, 5 holes, painted); ATE 24.0128-0269.1 (304 x 28 mm, vented, 5 holes, coated, high-carbon); Zimmermann 440.3128.52 (304 x 28 mm, vented, drilled, 5 holes, coated, Sport); febi bilstein 43865 (304 x 28 mm, vented, 5 holes, coated); Brembo 09.C133.1X (303.5 x 28 mm, vented, drilled, coated, high-carbon, Xtra line)
Disc sizes & variants	The common front disc is 304 x 28 mm, vented, five holes, 48 mm height. Larger 330 x 30 mm (Brembo 09.B929.11) and 340 x 30 mm (Ridex 82B0976) discs are listed for the higher-output engines and plug-in hybrid versions. All are vented; no solid front disc is offered.
Genuine (OE) numbers quoted	None quoted in catalogue listings — order genuine discs against your VIN
Fitment notes	Minimum thickness is 26 mm for the 304 x 28 mm disc and 28 mm for the 330 x 30 mm disc. Measure the fitted disc before ordering, as the 304, 330 and 340 mm sizes are all five-stud and the listings are not tied to engine codes.

Confirmed: A Genuine Citroën Technical Bulletin Covers a Specific Sticking Fault — Citroen C5 Aircross 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, 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.

Citroen C5 Aircross Brake Discs: Watch: Replacing It

🎬 Watch: CITROEN C5 X7 Front brake pads + rotors change (ENGLISH) (older gen)

Watch on YouTube ↗

WEAK: this is the older C5 saloon/estate (X7), a different model, not C5 Aircross; no Aircross or Peugeot 3008/5008 front-brake video found

Citroen C5 Aircross Brake Discs reference plate

Citroen C5 Aircross Brake Discs: The Part That Pads Depend On

On the Citroen C5 Aircross, it's a paired system: let either one wear too far and the other suffers for it, which is why so many "just a pad change" jobs end up including discs once a mechanic actually looks.

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.

Citroen C5 Aircross 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. Larger, sportier trims of the C5 Aircross typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.

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Citroen C5 Aircross 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 Citroen Brake Discs

The same part, covered across other Citroen models.