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

OEM Part Number: 34116855000

Accuracy note: confirmed for F48 generation (2015-2022) — front disc size varies genuinely by engine power (300mm, 307mm, or 330mm), so confirm your exact spec before ordering.

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

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.

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.

Fitment & Compatibility

Disc size and specification vary by trim and braking package on the X1. 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 BMW X1 from a dealer, specialist, or online marketplace, always check compatibility against your registration or VIN before buying.

A Genuinely Important, Honest Clarification Worth Knowing

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.

A genuinely alarming, honest account worth knowing: documented cases describe fast-fit chains replacing "warping" discs under warranty multiple times within less than a year, with owners suspecting the cheapest available parts were being used.

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.

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, how straightforward this job is to DIY, and choosing a reliable aftermarket disc.

More BMW Brake Discs

The same part, covered across other BMW models.