Mazda CX-3 Brake Discs: Specs, Fitment & Wear Symptoms
On the CX-3, real technical bulletins on related models address poor rear disc wear, linked to Mazda's TCS braking balance.
Illustration for editorial purposes
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OEM Part Number: B45G-33-251A (genuine front disc — confirm via VIN) — aftermarket front discs Brembo 09.C652.11 / Bosch 0 986 479 D71
| Front brake discs (aftermarket) | ATE 24.0125-0208.1 (295 x 25 mm, vented, 5 holes, coated, minimum 23 mm); Brembo 09.C652.11 (295 x 25 mm, vented, 5 holes, coated, minimum 23 mm); Bosch 0 986 479 D71 (295 x 25 mm, vented, 5 holes, coated, high-carbon, ECE-R90, minimum 23 mm); TRW DF6731 (295 x 25 mm, vented, 5 holes, painted black, minimum 23 mm); Zimmermann 370.3054.20 (295 x 25 mm, vented, 5 holes, coated, ECE R90, minimum 23 mm); febi bilstein 108514 (295 x 25 mm, vented, 5 holes, coated, minimum 23 mm). |
|---|---|
| Disc sizes & variants | 295 mm x 25 mm vented is the only front size confirmed for the CX-3, shared with the Mazda 3 BM. A 280 mm x 25 mm vented disc (Bosch 0 986 479 C36, Brembo 09.C651.11) is also catalogued for the model without axle position stated. The 265 mm and 281 mm discs are solid rears. |
| Genuine (OE) numbers quoted | B45G-33-251A (genuine front disc number for this model — confirm via VIN, as several disc sizes exist) |
| Fitment notes | The CX-3 uses the same 295 mm front disc as the Mazda 3 BM, with 23 mm minimum thickness, 114.3 mm bolt circle and 68 mm centre bore; confirm the diameter if the car has the smaller 280 mm set-up. |
Confirmed: Real Technical Bulletins Addressing This Exact Issue — Mazda CX-3 Brake Discs
This is genuinely worth knowing if you're seeing premature rear disc corrosion or uneven wear: Mazda has issued confirmed technical service bulletins specifically addressing poor rear brake disc wear on related models. Genuinely worth knowing why this happens: forum discussion points toward the rear brakes being applied harder and sooner than the fronts as a result of how Mazda's traction control system balances braking, combined with genuinely smaller rear pads that some owners believe may be under-specced.
It's also genuinely worth knowing about a real, honest, and rather damning consumer account: one owner, facing premature rear disc corrosion at just two years old, was told directly by Mazda UK that they were "washing their hands of it," declining warranty coverage and calling it fair wear and tear.
Mazda CX-3 Brake Discs: Watch: Replacing It
Only one CX-3 generation exists.
Mazda CX-3 Brake Discs: The Part That Pads Depend On
On the Mazda CX-3, wear on one of this pair accelerates wear on the other, so a pad change booked as routine maintenance often turns up discs that have quietly deteriorated alongside them.
Mazda CX-3 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 CX-3 typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.
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Mazda CX-3 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 Mazda Brake Discs
The same part, covered across other Mazda models.