Ford B-Max Brake Discs: Specs, Fitment & Wear Symptoms

A vibrating steering wheel after a brake job almost certainly isn't genuine disc warping — here's the real, more common cause.

Illustration for editorial purposes

OEM Part Numbers

Accuracy note: genuinely straightforward across the range — B-Max uses just two disc diameters across its entire production run, regardless of engine, unlike many rivals with several different sizes to confuse buyers.

Front discs, all variants	278mm diameter, vented, 23mm thickness
Rear discs, all variants	296mm diameter

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.

Before Assuming Your Discs Have Warped, Read This

A vibrating steering wheel under braking gets blamed on warped discs more often than any other cause — but in the large majority of cases, the discs haven't actually bent from heat at all. What's really happening is Disc Thickness Variation (DTV), uneven pad material deposits building up across the disc surface, often during the bedding-in period after a fresh fit, producing the same pulsing sensation as genuine warping. Bedding in new discs and pads gradually, avoiding hard braking in the first few hundred miles, measurably reduces the risk of this developing in the first place.

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 B-Max typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.

Fitment & Compatibility

Disc size and specification vary by trim and braking package on the B-Max. Always confirm the exact disc size and design fitted to your specific trim before ordering. Whether you're sourcing a replacement brake discs for your Ford B-Max from a dealer, specialist, or online marketplace, always check compatibility against your registration or VIN before buying.

Common Wear Symptoms

Vibration or pulsing through the brake pedal — often a sign of warped discs, usually from excessive heat build-up.
Visible grooves or scoring on the disc surface — indicates the pads have worn down to metal and are cutting into the disc itself.
Squealing that persists even with new pads — can point to a rough or glazed disc surface needing replacement.
Longer stopping distances despite good pads — worn or warped discs reduce effective braking surface contact.

DIY Replacement Difficulty

This is a moderate DIY job for someone comfortable with basic tools and a jack, typically done alongside a pad replacement since the caliper needs removing either way. Rear discs on cars with an electronic parking brake may need a specific tool or diagnostic device to retract the caliper. Expect 45–90 minutes per side including pads.

OEM vs. Aftermarket

Reputable aftermarket brake discs are widely regarded as safe and effective, provided they carry proper certification and match the correct size and design for your trim. As with pads, this is a part worth not cutting corners on — budget unbranded discs are a common source of premature warping and noise complaints.

More Ford Brake Discs Guides

The same part, covered across other Ford models.