Ford Fiesta Brake Discs: Specs, Fitment & Wear Symptoms
Corrosion, not mileage, is often the real reason Fiesta discs need replacing — here's the pattern independent garages consistently report.
Illustration for editorial purposes
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OEM Part Number: BD1943
| Front discs, standard (most petrol/diesel) | 258mm diameter, vented, 23mm new thickness, 21mm minimum (Brembo 09.A968.21, Bosch BD1943) |
|---|---|
| Front discs, ST models | 278mm diameter, vented, 23mm new thickness, 21mm minimum (Brembo 09.C422.11) |
| Rear discs, standard | 253mm diameter, solid, 10.1mm new thickness, 8.9mm minimum |
| Ford's own minimum thickness specification | Front: 21mm minimum. Rear: 9mm minimum — replace before reaching these figures, not once you hit them. |
Corrosion, Not Just Mileage, Is Often the Real Reason Discs Get Replaced
A genuine, recurring pattern reported by Fiesta owners and independent garages alike: discs on cars covering relatively modest mileage — some reports around 50,000 miles — needed replacing purely due to corrosion rather than reaching the end of their genuine wear life. This tends to affect cars that see a lot of stop-start, low-speed driving or that have spent time in wetter, more heavily salted regions, since rust has more opportunity to take hold when the discs aren't being cleaned by regular, harder braking. One widely repeated rule of thumb among independent garages: expect discs to need replacing roughly every 3-4 sets of pads on a typical Fiesta — corrosion, more than raw mileage, is usually what determines whether that estimate holds or the discs last considerably longer.
Ford Fiesta Brake Discs: The Part That Pads Depend On
On the Ford Fiesta, because discs and pads wear as a pair, neglecting one speeds up wear on the other — which explains why a routine pad change so often turns up discs that are further gone than expected.
Ford Fiesta 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 Fiesta typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.
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Ford Fiesta 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 Ford Brake Discs
The same part, covered across other Ford models.