Parts for your 2014 Subaru Impreza-Centre bearing

2014 Subaru Impreza centre-bearing — what it is, why it matters, and when to replace it

For the 2014 Subaru Impreza (GJ/GP series), a centre-bearing is absolutely relevant. Technical sources including the Subaru Impreza (GJ/GP) Service Manual (Driveline & Axle — Propeller Shaft System) and the Subaru Electronic Parts Catalogue specify a two-piece propeller shaft with a centre support bearing and bracket mounted to the body tunnel. OEM parts listings show the centre-bearing supplied as part of the complete propeller/drive shaft assembly, rather than a separate service item, which is typical of Subaru’s Symmetrical AWD layout for this model year.

On this Impreza, the centre-bearing’s job is to support the two-piece prop shaft that sends drive to the rear differential, keeping the shaft running true and dampening vibration. When it’s healthy, the driveline feels smooth and quiet. When it’s tired, owners often report a droning or humming between suburban and highway speeds, a shudder on take-off, or a thump when getting on and off the throttle. Visual clues include a perished rubber isolator around the bearing or a sagging bracket.

Servicing-wise, there’s not much to “maintain” on the bearing itself — it’s a sealed unit carried in a rubber mount. Good practice is to check it during routine servicing:

• Look for cracked or separated rubber around the support bearing.
• Check bracket bolts for tightness and signs of movement or fretting.
• Road-test for mid-speed vibration that changes with vehicle speed, not engine rpm.

If replacement is needed, Subaru generally supplies the prop shaft as a complete assembly with the centre-bearing integrated. Many workshops in Australia and New Zealand follow that route because the OE bearing and unis aren’t designed to be serviced separately. Aftermarket driveline specialists can sometimes rebuild the shaft with a new carrier/centre-bearing, but correct phasing and balance are critical. For DIY or shop fitment, the essentials are straightforward: mark flange positions before removal, don’t separate the shaft halves or disturb the phasing, support the exhaust/heat shields as needed, use new self-locking fasteners, and tighten to the service manual’s torque specs. A quick alignment check and a test drive to confirm vibration-free running round out the job.

Keeping ride height and driveline angles close to stock, replacing tired engine/gearbox mounts, and avoiding impact damage to the underbody all help protect the centre-bearing over the long haul.

FAQs

Does a 2014 Subaru Impreza have a centre-bearing?
Yes. The 2014 Impreza’s AWD system uses a two-piece propeller shaft with a centre support bearing mounted to the tunnel. Subaru’s GJ/GP Service Manual and parts catalogue list the centre-bearing as part of the complete prop shaft assembly.

What are the signs a centre-bearing is failing on a 2014 Impreza?
Common signs include a low droning or humming that tracks with road speed, a shudder on take-off, and a thump on load changes. Underneath, the rubber around the bearing may be cracked or sagging, and there may be witness marks where the bracket has moved.

Can the centre-bearing be replaced on its own, or is a full driveshaft needed?
From the factory it’s supplied with the prop shaft, so many workshops replace the complete assembly. Some driveline specialists can press in a new centre-bearing and re-balance the shaft. If going that route, correct phasing and balancing are vital to avoid new vibrations.