Mazda 6 Brake Discs: Specs, Fitment & Wear Symptoms
On the Mazda 6, 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: G61N-33-251 (genuine front disc — confirm via VIN) — aftermarket front discs Brembo 09.C654.11 / Bosch 0 986 479 B15
| Front brake discs (aftermarket) | Brembo 09.C654.11 (297 x 28 mm, vented, 5 holes, coated, minimum 26 mm); Brembo 09.C654.75 (297 x 28 mm, vented, slotted, 5 holes, coated, minimum 26 mm); ATE 24.0128-0277.1 (297 x 28 mm, vented, 5 holes, coated, minimum 26 mm); Zimmermann 370.3050.20 (297 x 28 mm, vented, 5 holes, coated, minimum 26 mm); Bosch 0 986 479 B15 (297 x 28 mm, vented, 5 holes, oiled finish, ECE-R90, minimum 26 mm); TRW DF8052 (297 x 28 mm, vented, 5 holes); Bosch 0 986 479 H02 (320 x 28 mm, vented, 5 holes, coated, high-carbon, minimum 26 mm); Zimmermann 370.4405.20 (320 x 28 mm, vented, 5 holes, coated, high-carbon, minimum 26 mm). |
|---|---|
| Disc sizes & variants | 297 mm x 28 mm vented is the standard front disc across the 2.0 and 2.5 petrol and 2.2 diesel range. A 320 mm x 28 mm vented, high-carbon disc (Bosch H02, Zimmermann 370.4405.20) covers the uprated-brake cars, typically the higher-output 2.5 and 2.2 diesel with the larger wheels. The 278 mm discs are solid rears. |
| Genuine (OE) numbers quoted | G61N-33-251 (genuine front disc number for this model — confirm via VIN, as several disc sizes exist) |
| Fitment notes | Most GJ saloons take the 297 mm disc with 26 mm minimum thickness; check the fitted diameter because the 320 mm option shares the same 28 mm thickness and bolt pattern. Five-stud, 114.3 mm bolt circle, 68 mm centre bore. |
Confirmed: Real Technical Bulletins Addressing This Exact Issue — Mazda 6 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 6 Brake Discs: Watch: Replacing It
GJ generation by date.
Mazda 6 Brake Discs: The Part That Pads Depend On
On the Mazda 6, 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 6 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 6 typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.
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Mazda 6 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.