Parts for your 2013 Bmw X3-Strut mounts

2013 BMW X3 (F25) strut mounts — what they do and when to replace them

Strut mounts are fitted to the 2013 BMW X3 and they’re absolutely relevant. BMW’s own technical information (BMW TIS/ISTA repair instructions for the F25 front “spring strut”) describes a MacPherson-type front axle, which uses a strut assembly topped by a support/guide bearing and rubber mount — commonly called the strut mount. The BMW ETK/RealOEM parts catalogue also lists the front “support bearing with rubber mount” for the F25 X3. That means the vehicle runs front strut mounts, the rear is a separate shock and spring setup, so the back end uses shock mounts rather than strut mounts.

Up front, the strut mounts on a 2013 X3 do two big jobs. First, they isolate road harshness and vibration so the cabin stays civilised. Second, they act as the pivot point for steering, thanks to the built-in bearing that lets the strut turn smoothly with the wheels. When the mounts wear, the X3 can feel a bit off — think clunks over speed humps, a knock when turning at low speed, vague steering, or a rubbery creak as the wheel’s wound from lock to lock.

As part of regular servicing, it’s smart to inspect the strut mounts whenever the front end is up on the hoist. Look for cracked or delaminated rubber, rusty or collapsed housings, and any binding in the bearing. In Aussie and Kiwi conditions — with plenty of coarse-chip roads and the odd corrugated track — many workshops see mount wear around 80,000–120,000 km, but it varies with use. If the front dampers (struts) are being replaced, doing the mounts at the same time is good practice. A tired mount can quickly spoil the feel of new shocks, and doing both together saves on labour and a second wheel alignment.

When replacing, use quality OEM-equivalent mounts with the integrated bearing. Follow BMW repair procedures: replace any single-use (self-locking) nuts/bolts, orient the mount correctly (there are alignment marks), torque everything to spec, and finish with a proper four-wheel alignment. After fitment, a quick road test over low-speed bumps and a full steering sweep should be quiet and smooth. Keeping the mounts in good nick preserves steering precision, reduces tyre feathering, and keeps the X3 riding the way BMW intended.

• Typical symptoms: clunks or pops over bumps, notchy steering, uneven tyre wear, wandering on the motorway.
• Service tip: inspect at every front suspension job, replace with the struts or at first sign of play, noise, or cracked rubber.
• Finish with an alignment, poor mount geometry can throw out camber/caster and toe.

Popular questions

How do you tell if the front strut mounts are gone on a 2013 X3?
Common tells are a dull knock over small bumps, a creak or graunch when turning at parking speeds, and steering that won’t self-centre cleanly. A visual check often shows perished rubber or a sagging mount top. Jacking the front and rotating the strut by hand can reveal a gritty, binding bearing.

Do the rear mounts on an X3 count as “strut mounts”?
No — the rear of the F25 uses separate shocks and springs, so they’re shock mounts, not strut mounts. They’re still important and can knock when worn, but the steering-related pivot bearing is only up front with the strut mounts.

Should strut mounts be replaced with the front struts?
It’s recommended. The labour overlaps, and fresh mounts protect new dampers from excess play and noise. Many workshops treat mounts as a “while you’re in there” item, especially beyond about 100,000 km or if there’s any sign of bearing roughness or rubber cracking.