BMW X1 Brake Discs: Specs, Fitment & Wear Symptoms
On the X1, what's commonly called "warped discs" is genuinely almost always uneven pad deposits, since cast iron is genuinely hard to warp.
Illustration for editorial purposes
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OEM Part Number: 34116855000
| Higher-performance variants, front disc | BMW OEM: 34116855000 (also referenced as 34116770729) — 348mm diameter, 30mm thickness |
|---|---|
| sDrive18d/xDrive18d, front discs | 300mm diameter, vented, 20mm thickness, 18.4mm minimum |
| xDrive20d/sDrive20d, front discs | 307mm diameter, vented, 24mm thickness |
| xDrive25d/25i, front discs | 330mm diameter, vented, 24mm thickness, 22.4mm minimum |
| Rear discs, most variants | 280mm diameter, solid, 10mm thickness, 8.4mm minimum |
BMW X1 Brake Discs: The Part That Pads Depend On
On the BMW X1, these two components wear together, and letting one go too long accelerates wear on the other, which is why a simple pad swap so often reveals discs that need replacing at the same time.
BMW X1 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 X1 typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.
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A Genuinely Important, Honest Clarification Worth Knowing — BMW X1 Brake Discs
If a vibration under braking has been diagnosed as warped discs, this is genuinely worth knowing: what's commonly described as "warped discs" is, in reality, almost always caused by uneven deposits of pad material on the disc surface, since cast iron itself is genuinely difficult to warp under normal driving conditions.
It's also genuinely worth knowing a useful fix worth trying: thoroughly cleaning the mating surfaces between the wheel hub and the disc, or better still fitting new hubs entirely, has been documented resolving this kind of persistent vibration.
BMW X1 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 BMW Brake Discs
The same part, covered across other BMW models.