Ford Ka+ Brake Discs: Specs, Fitment & Wear Symptoms
A vibrating steering wheel on the Ka+ is usually blamed on warped discs — but the real, more common cause is something else entirely.
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Ford Ka+ Brake Discs: OEM Part Number
| Front discs, all variants | Ford OEM: G3MJ/1125/BA/ — 258mm diameter, vented, 23mm thickness, 21mm minimum |
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Ford Ka+ Brake Discs: The Part That Pads Depend On
On the Ford Ka+, 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.
"Warped Discs" Is Usually the Wrong Diagnosis
Vibration 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.
Ford Ka+ 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 Ka+ typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.
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Ford Ka+ 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.